Danh sách loài trong họ Desmidiaceae
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Actinotaenium 
 Actinotaenium ((Naegeli) Teiling)
 Actinotaenium clevei ((Lund.) Teil.)
 Actinotaenium clevei var. clevei ((Lundell) Teiling)
 Actinotaenium clevei var. gelidum ((Wittr.) Roy and Biss.)
 Actinotaenium cruciferum ((Brebisson) West and West)
 Actinotaenium cruciferum var. cruciferum ((Brebisson) West and West)
 Actinotaenium cruciferum var. latius (Teiling)
 Actinotaenium cruciferum var. minus (Teiling)
 Actinotaenium cucurbita ((Brebisson) Teil.)
 Actinotaenium cucurbita var. cucurbita ((Brebisson) Teil.)
 Actinotaenium cucurbita var. latius ((W. West) Teil.)
 Actinotaenium cucurbita var. attenuata ((G. S. West) Teiling)
 Actinotaenium cucurbitinum ((Biss.) Teil.)
 Actinotaenium cucurbitinum var. cucurbitinum ((Biss.) Teil.)
 Actinotaenium cucurbitinum var. minus ((West and West) Teil.)
 Actinotaenium cucurbitinum var. minutum ((Prescott) Teiling)
 Actinotaenium curtum ((Brebisson Ex Ralfs) Teil.)
 Actinotaenium curtum var. minus ((Brebisson Ex Ralfs) Teil.)
 Actinotaenium diplosporum ((Lund.) Teil.)
 Actinotaenium diplosporum var. diplosporum ((Lind.) Teil.)
 Actinotaenium diplosporum var. americanum ((West and West) Teil.)
 Actinotaenium inconspicuum ((W. West) Teil.)
 Actinotaenium rufescens ((Brebisson) West and West)
 Actinotaenium taylori ((Brebisson) West and West)
 Actinotaenium viride ((Brebisson) West and West)
 Actinotaenium canadense (Bourrelly)
 Actinotaenium cotatum ((Wolle) Bourrelly)
 Actinotaenium subglobosum ((Nordst.) Teiling)
 Actinotaenium regelianum ((Naegeli) Schllenberg)
 Actinotaenium crassiusculum ((Be Bary) Teiling)
 Actinotaenium capax ((Joshua) Teiling)
 Actinotaenium capax var. capax ((Joshua) Teiling)
 Actinotaenium capax var. minus ((Schmidle) Teiling)
 Actinotaenium elongatum ((Racib.) Teiling)
 Actinotaenium subtile ((West and West) Teiling)
 Actinotaenium trachypolum ((West and West) Teiling)
 Actinotaenium trachypolum var. trachypolum ((West and West) Teiling)
 Actinotaenium trachypolum var. messikommeri (Teiling)

Arthrodesmus 
 Arthrodesmus (Ehrenberg)
 * Arthrodesmus extensus ((Borge) Hirano)
 * Arthrodesmus extensus var. extensus ((Borge) Hirano)
 * Arthrodesmus extensus var. croasdaleae (Bicudo)
 * Arthrodesmus crassus (West and West)
 * Arthrodesmus mucronulatus (Nordst.)
 * Arthrodesmus octocornis (Ehrenberg)
 * Arthrodesmus octocornis var. octocornis (Ehrenberg)
 * Arthrodesmus octocornis var. mamillatus (Scott and Gronblad)
 * Arthrodesmus octocornis var. tenuis (Irenee-marie)
 * Arthrodesmus tenuissimus (Archer)
 * Arthrodesmus trispinatus (West and West)
 * Arthrodesmus sachlanii (Scott and Prescott)
 * Arthrodesmus subulatus (Kuetzing)
 * Arthrodesmus validus ()
 * Arthrodesmus validus var. validus ()
 * Arthrodesmus validus var. incrassatus (Scott and Gronblad)
 * Arthrodesmus ralfsii (Turpin)
 * Arthrodesmus ralfsii var. ralfsii (Turpin)
 * Arthrodesmus ralfsii var. latiuscula (West and West)
 * Arthrodesmus phimus (Turner)
 * Arthrodesmus phimus var. phimus (Turner)
 * Arthrodesmus phimus var. occidentalis (West and West)
 * Arthrodesmus bifidus (Brebisson)
 * Arthrodesmus bifidus var. bifidus (Brebisson)
 * Arthrodesmus bifidus var. cruciatum (Skuja)
 * Arthrodesmus bifidus var. missionwellensis (Sieminska)
 * Arthrodesmus bulnheimii (Raciborski)
 * Arthrodesmus bulnheimii var. bulnheimii (Raciborski)
 * Arthrodesmus bulnheimii var. subincus (West and West)
 * Arthrodesmus incus ((Brebisson) Hassall)
 * Arthrodesmus incus var. incus ((Brebisson) Hassall)
 * Arthrodesmus incus var. indentatus (West and West)
 * Arthrodesmus incus var. malaccensis (Bernard)
 * Arthrodesmus incus var. validus (West and West)
 * Arthrodesmus incus var. vulgaris (Eichler and Raciborski)
 * Arthrodesmus mooari (Jackson)
 * Arthrodesmus tortus (Groenblad)
 * Arthrodesmus triangularis (Lagerheim)
 * Arthrodesmus triangularis var. triangularis (Lagerheim)
 * Arthrodesmus triangularis var. suntriangularis ((Bborge) West and West)

Bambusina 
 Bambusina (Kuetzing Ex Kuetzing, 1849)
 Bambusina brebissonii (Kuetz.)
 Bambusina borreri ((Ralfs) Cleve)
 Bambusina moniliformis (Ehrenberg)
 Bambusina moniliformis var. moniliformis (Ehrenberg)
 Bambusina moniliformis var. gracilescens (Norstedtg)
 Bambusina delicatissima (Wolle)

Closterium 
 Closterium (J. Ralfs, 1848)
 * Closterium setaceum var. vittatum (Gronbl.)
 * Closterium dianae var. brevius (Woloszynska)
 * Closterium kuetzingii var. vittatum (Nordst)
 * Closterium parvulum var. maius (G. S. West)
 * Closterium tumidum var. nylandicum (Gronbl.)
 * Closterium arcuarium (Hughes)
 * Closterium malinvernianiforme (Gronbl.)
 * Closterium gracile (Breb)
 * Closterium gracile var. gracile (Breb)
 * Closterium gracile var. elongatum (West and West)
 * Closterium gracile var. tenue ((Lemm.) West and West)
 * Closterium acutum (Breb)
 * Closterium acutum var. acutum ((Lyngb.) Breb.)
 * Closterium acutum var. linea ((Perty) West and West)
 * Closterium acutum var. variabile ((Lemm.) Krieg.)
 * Closterium setaceum (Ehrenberg)
 * Closterium setaceum var. setaceum (Ehrenberg)
 * Closterium setaceum var. sigmoideum (Irenne-marie)
 * Closterium didymotocum ()
 * Closterium strigosum (Brebisson)
 * Closterium strigosum var. strigosum (Brebisson)
 * Closterium strigosum var. elegans ((G. West) Krieg.)
 * Closterium acerosum ()
 * Closterium acerosum var. acerosum ((Shrank) Ehrbg.)
 * Closterium acerosum var. angolense (West and West)
 * Closterium acerosum var. elongatum (Breb)
 * Closterium acerosum var. minus (Hantz.)
 * Closterium lunula ((O. F. Mueller) J. Ralfs)
 * Closterium lunula var. lunula ((O. F. Mueller) J. Ralfs)
 * Closterium lunula var. gracilis (Messik.)
 * Closterium lunula var. maximum (Borge)
 * Closterium lunula var. minor (West and West)
 * Closterium lunula var. coloratum (Taft)
 * Closterium littorale (Gay.)
 * Closterium aciculare (T. West)
 * Closterium aciculare var. aciculare (T. West)
 * Closterium aciculare var. brevis (Elenkin)
 * Closterium angustatum (Kuetz.)
 * Closterium angustatum var. angustatum (Kuetz.)
 * Closterium angustatum var. boergesenii (Gutw.)
 * Closterium angustatum var. annulatum (Hugues)
 * Closterium angustatum var. gracile (Kossinskaja)
 * Closterium archerianum (Cleve)
 * Closterium archerianum var. archerianum (Cleve)
 * Closterium archerianum var. major (Irenee-marie)
 * Closterium attenuatum (Ehrbg.)
 * Closterium baillyanum (Brebisson)
 * Closterium baillyanum var. baillyanum (Brebisson)
 * Closterium baillyanum var. parvulum (Groenblad.)
 * Closterium braunii (Reinsch)
 * Closterium calosporum (Wittrock)
 * Closterium calosporum var. caloporuum (Wittrock)
 * Closterium calosporum var. brasiliense (Boergesen)
 * Closterium cornu (Ehrbg.)
 * Closterium cornu var. cornu (Ehrbg.)
 * Closterium cornu var. arcum (Turpin)
 * Closterium costatum (Corda)
 * Closterium costatum var. costatum (Corda)
 * Closterium costatum var. dilatatum ((West and West) Krieg)
 * Closterium costatum var. westii (Cushman)
 * Closterium costatum var. scotii (Prescott)
 * Closterium costatum var. subcostatum ((Nordst.) Krieger)
 * Closterium cynthia (Denot)
 * Closterium cynthia var. cynthia (Denot)
 * Closterium cynthia var. jenneri ((Ralfs) Krieger)
 * Closterium delpontii ((Klebs) Wolle)
 * Closterium dianae (Woloszynska)
 * Closterium dianae var. dianae (Woloszynska)
 * Closterium dianae var. arcuatum (Woloszynska)
 * Closterium dianae var. excavatum ((Borge) Ruzicki)
 * Closterium eboracense ((Ehrbg.) Turner)
 * Closterium ehrenbergii (Meneghini)
 * Closterium ehrenbergii var. ehrenbergii (Meneghini)
 * Closterium ehrenbergii var. malinvernianum ((Brebisson) West and West)
 * Closterium idiosporum (West and West)
 * Closterium incurvum (Breb)
 * Closterium intermedium (Ralfs)
 * Closterium intermedium var. intermedium (Ralfs)
 * Closterium intermedium var. hibernicum (West)
 * Closterium jenneri (Ralfs)
 * Closterium jenneri var. jenneri (Ralfs)
 * Closterium jenneri var. robustum (Ralfs)
 * Closterium juncidium (Ralfs)
 * Closterium juncidium var. juncidium (Ralfs)
 * Closterium juncidium var. brevius ((Ralfs) Roy)
 * Closterium juncidium var. elongatum (Roy and Biss.)
 * Closterium kuetzingii (Brebisson)
 * Closterium kuetzingii var. kuetzingii (Brebisson)
 * Closterium kuetzingii var. sigmoides (Irenee-marie)
 * Closterium lagoense (Nordstsdt)
 * Closterium lanceolatum (Kuetz)
 * Closterium lanceolatum var. lanceolatum (Kuetz)
 * Closterium lanceolatum var. parvum (West and West)
 * Closterium leibleinii (Kuetzing)
 * Closterium leibleinii var. leibleinii (Kuetzing)
 * Closterium leibleinii var. recurvatum (West and West)
 * Closterium libellula (Focke)
 * Closterium libellula var. libellula (Focke)
 * Closterium libellula var. intermedium ((Roy and Biss.) G. West)
 * Closterium libellula var. interruptum ((West and West) Donat)
 * Closterium lineatum (Ehrenberg)
 * Closterium lineatum var. lineatum (Ehrenberg)
 * Closterium lineatum var. costatum (Wolle)
 * Closterium lineatum var. latius ((Elenkin and Lobik))
 * Closterium macilentum (Breb)
 * Closterium moniliferum ((Bory) Ehrbg.)
 * Closterium moniliferum var. miniliferum ((Bory) Ehrbg.)
 * Closterium moniliferum var. subrectum ((Groenbl.) Poljansky)
 * Closterium moniliferum var. concavum (Klebs)
 * Closterium navicula ((Breb) Luetkem.)
 * Closterium navicula var. navicula ((Breb) Luetkem.)
 * Closterium navicula var. crassum ((West and West) Groenbl.)
 * Closterium navicula var. inflatum (West and West) Groenbl.)
 * Closterium parvulum (Naeg.)
 * Closterium parvulum var. parvulum (Naeg.)
 * Closterium parvulum var. angustum (West and West)
 * Closterium parvulum var. taylori (Jackson)
 * Closterium parvulum var. obtusum (Croasdale)
 * Closterium porrectum (Nordst.)
 * Closterium praelongum (Breb)
 * Closterium praelongum var. praelongum (Breb)
 * Closterium praelongum var. brevius (Nordst.)
 * Closterium praelongum var. crassius (Schm.)
 * Closterium praelongum var. brevior (West)
 * Closterium praelongum var. elongatum (Jackson)
 * Closterium pritchardianum (Archer)
 * Closterium pronum (Breb)
 * Closterium pseudodianae (Roy)
 * Closterium ralfsii (Brebisson)
 * Closterium ralfsii var. ralfsii (Brebisson)
 * Closterium ralfsii var. hybridum (Rabenhorst)
 * Closterium ralfsii var. montanum (Raciborski)
 * Closterium ralfsii var. immane (Cushman)
 * Closterium ralfsii var. gracilius ((Mask.) Krieger)
 * Closterium ralfsii var. kriegeri (Hughes)
 * Closterium ralfsii var. novae-angliae (Krieger)
 * Closterium regulare (Brebisson)
 * Closterium rostratum (Ehrenberg)
 * Closterium striolatum (Ehrenberg)
 * Closterium striolatum var. striolatum (Ehrenberg)
 * Closterium striolatum var. subtruncatum ((West and West) Krieg.)
 * Closterium striolatum var. erectum (Klebs)
 * Closterium striolatum var. intermedium (Ehrenberg)
 * Closterium sublatum ((Kuetz.) Breb.)
 * Closterium toxon (Turpin)
 * Closterium tumidum (Johnson)
 * Closterium tumidum var. tumidum (Johnson)
 * Closterium tumidum var. sphaerosporum (G. West)
 * Closterium turgidum (Ehrenberg)
 * Closterium turgidum var. turgidum (Ehrenberg)
 * Closterium turgidum var. giganteum (Nordst. In Wittr. and Nordst.)
 * Closterium ulna (Focke)
 * Closterium ulna var. ulna (Focke)
 * Closterium ulna var. recurvatum ((Roll) Krieger)
 * Closterium venus (Kuetz.)
 * Closterium venus var. venus (Kuetz.)
 * Closterium venus var. westii ((West) Krieg.)
 * Closterium venus var. minus (Roll.)
 * Closterium venus var. appollonionis (Croasdale)
 * Closterium venus var. crassum (Corasdale)
 * Closterium venus var. incurvum ((Brebisson) West and West)
 * Closterium abruptum (Turpin)
 * Closterium abruptum var. abruptum (Turpin)
 * Closterium abruptum var. brevis (West and West)
 * Closterium abruptum var. canadense (Bourrelly)
 * Closterium brunelii (Bourrelly)
 * Closterium cuspidatum (Bailey)
 * Closterium laterale (Nordstedt)
 * Closterium malmei (Borge)
 * Closterium pusillum (Hantzsch)
 * Closterium seracerosum ()
 * Closterium peracerosum (Gay)
 * Closterium peracerosum var. peracerosum (Gay)
 * Closterium peracerosum var. elegans (G. S. West)
 * Closterium flaccidum (Delponte)
 * Closterium limneticum (Lemmermann)
 * Closterium limneticum var. limnecticum (Lemmermann)
 * Closterium limneticum var. fallax (Ruzicka)
 * Closterium nematodes (Joshua)
 * Closterium spetsbergense (Borge)
 * Closterium spetsbergense var. spetsbergense (Borge)
 * Closterium spetsbergense var. longius (Poljansky)
 * Closterium spetsbergense var. subspetsbergense ((Wor.) Kossinskaja)
 * Closterium subangulatum (Gutwinski)
 * Closterium sublaterale (Ruzicka)
 * Closterium tumidulum (Gay)
 * Closterium eriense (Taft)
 * Closterium brebissonii (Delpont)

Cosmarium 
 Cosmarium (Ralfs, 1848)
 * Cosmarium undulatum (Ralfs, 1848)
 * Cosmarium monomazum (Lund.)
 * Cosmarium botrytis (Meneghini)
 * Cosmarium botrytis var. botrytis (Meneghini)
 * Cosmarium botrytis var. tumidum (Wolle)
 * Cosmarium botrytis var. subtumidum (Wittrock)
 * Cosmarium botrytis var. gemmiferum (Meneghini)
 * Cosmarium abbreviatum (Reciborski)
 * Cosmarium abbreviatum var. abbreviatum (Reciborski)
 * Cosmarium abbreviatum var. planctonicum (West and West)
 * Cosmarium alpestre (Roy and Biss.)
 * Cosmarium amoenum (Brebisson)
 * Cosmarium anceps (Lind.)
 * Cosmarium angulatum ((Perty) Rabh.)
 * Cosmarium angulatum var. angulatum ((Perty) Rahb.)
 * Cosmarium angulatum var. major (Grunow)
 * Cosmarium angulosum (Brebisson)
 * Cosmarium annulatum ((Naegeli) De Bary)
 * Cosmarium annulatum var. annulatum ((Naegeli) De Bary)
 * Cosmarium annulatum var. elegans (Nordst.)
 * Cosmarium arctorum (Nordst.)
 * Cosmarium askenasyi (Schm.)
 * Cosmarium askenasyi var. askenasyi (Schm.)
 * Cosmarium askenasyi var. americana (Carter)
 * Cosmarium asphaerosporum (Nordstedt)
 * Cosmarium asphaerosporum var. asphaerosporum (Nordstedt)
 * Cosmarium asphaerosporum var. strigosum (Nordstedt)
 * Cosmarium auriculatum (Reinsch)
 * Cosmarium balteum (West and West)
 * Cosmarium binum (Nordstedt)
 * Cosmarium bioculatum (Brebisson)
 * Cosmarium blytti (Wille)
 * Cosmarium blytti var. blytti (Wille)
 * Cosmarium blytti var. novaesylvae (West and West)
 * Cosmarium boeckii (Wille)
 * Cosmarium brebissoni (Menegh.)
 * Cosmarium caelatum (Ralfs)
 * Cosmarium capitulum (Roy and Biss.)
 * Cosmarium circulare (Reinsch)
 * Cosmarium circulare var. circulare (Reinsch)
 * Cosmarium circulare var. majus (Hansg.)
 * Cosmarium commissurale (Brebisson)
 * Cosmarium commissurale var. commossurale (Nordstedt)
 * Cosmarium commissurale var. crassum (Nordstedt)
 * Cosmarium connatum (Brebisson)
 * Cosmarium conspersum (Ralfs)
 * Cosmarium conspersum var. conspersum (Ralfs)
 * Cosmarium conspersum var. latum ((Brebisson) West and West)
 * Cosmarium contractum (Kirchner)
 * Cosmarium contractum var. contractum (Kirchner)
 * Cosmarium contractum var. ellipsoideum ((Elfv.) West and West)
 * Cosmarium contractum var. papillatum (G. M. Smith)
 * Cosmarium contractum var. incrassatum (Scott and Prescott)
 * Cosmarium costatum (Nordst.)
 * Cosmarium crenatum (Ralfs)
 * Cosmarium crenatum var. crenatum (Ralfs)
 * Cosmarium crenatum var. bicrenatum (Nordst.)
 * Cosmarium crenatum var. boldtiana ((Gutw.) West and West)
 * Cosmarium cucumis (Corda Ex Ralfs)
 * Cosmarium cyclicum (Lund.)
 * Cosmarium cyclicum var. cyclicum (Lund.)
 * Cosmarium cyclicum var. nordstedtianum ((Reinsch) West and West)
 * Cosmarium cylindricum (Ralfs)
 * Cosmarium debaryi (Archer)
 * Cosmarium dentatum (Wolle)
 * Cosmarium dentiferum (Corda)
 * Cosmarium depressum ((Naeg.) Lund.)
 * Cosmarium depressum var. depressum ((Naeg.) Lund.)
 * Cosmarium depressum var. achondrum ((Boldt) W. West and G. S. West)
 * Cosmarium depressum var. planctonicum (Reverd.)
 * Cosmarium depressum var. sublaeve (Lutkemuller)
 * Cosmarium difficile (Lutkemuller)
 * Cosmarium difficile var. difficile (Lutkemuller)
 * Cosmarium difficile var. rotundum (Scott and Gronblad)
 * Cosmarium elegantissimum (Lund)
 * Cosmarium elegantissimum var. elegantissimum (Lund)
 * Cosmarium elegantissimum var. minor (Turpin)
 * Cosmarium elegantissimum var. attenuatum (Bicudo)
 * Cosmarium elegantissimum var. simplicus ((Lund.) W. West and G. S. West)
 * Cosmarium eloiseanum (Wolle)
 * Cosmarium entochondrum (West and West)
 * Cosmarium exiguum (Archer)
 * Cosmarium formosulum (Hoff.)
 * Cosmarium formosulum var. formosulum (Hoff.)
 * Cosmarium formosulum var. nathorstii ((Boldt.) West and West)
 * Cosmarium furcatospermum (West and West)
 * Cosmarium galeritum (Nordstedt)
 * Cosmarium globosum (Bulnh.)
 * Cosmarium globosum var. globosum (Bulnh.)
 * Cosmarium globosum var. boldtii (Krieg. and Gerl.)
 * Cosmarium granatum (Brebisson)
 * Cosmarium granatum var. granatum (Brebisson)
 * Cosmarium granatum var. elongatum (Nordstedt)
 * Cosmarium granatum var. subgranatum (Nordstedt)
 * Cosmarium granulatum (Turpin)
 * Cosmarium hammeri (Reinsch)
 * Cosmarium hammeri var. hammeri (Reinsch)
 * Cosmarium hammeri var. homalodermum ((Nordstedt) West and West)
 * Cosmarium hammeri var. protuberans (West and West)
 * Cosmarium holmiense (Lundell)
 * Cosmarium holmiense var. holmiense (Lundell)
 * Cosmarium holmiense var. integrum (Lundell)
 * Cosmarium humile ((Gay) Nordstedt)
 * Cosmarium humile var. humile ((Gay) Nordstedt)
 * Cosmarium humile var. striatum ((Boldt) Schm.)
 * Cosmarium impressulum (Elfving)
 * Cosmarium impressulum var. impressulum (Elfving)
 * Cosmarium impressulum var. crenulatum ((Naeg.) Krieg. and Gerl.)
 * Cosmarium inconspicuum (West and West)
 * Cosmarium isthmium (Turpin)
 * Cosmarium kjellmani (Wille)
 * Cosmarium kjellmani var. kjellmani (Wille)
 * Cosmarium kjellmani var. grande (Wille)
 * Cosmarium laeve (Rabenhorst)
 * Cosmarium laeve var. laeve (Rabenhorst)
 * Cosmarium laeve var. westii (Krieg. and Gerl.)
 * Cosmarium laeve var. rodundatum (Messikommer)
 * Cosmarium laeve var. octangularis ((Wille) W. and G. S. West)
 * Cosmarium laeve var. distentum (G. S. West)
 * Cosmarium lundellii (Delp.)
 * Cosmarium lundellii var. lundellii (Delp.)
 * Cosmarium lundellii var. ellipticum (West and West)
 * Cosmarium margaritatum ((Lund) Roy and Bisset)
 * Cosmarium margaritiferum (Menegh.)
 * Cosmarium meneghinii (Brebisson)
 * Cosmarium meneghinii var. meneghinii (Brebisson)
 * Cosmarium meneghinii var. latiuscula (Jacobs)
 * Cosmarium microsphinctum (Nordstedt)
 * Cosmarium minimum (West and West)
 * Cosmarium modestum (West and West)
 * Cosmarium moniliforme ((Turpin) Ralfs)
 * Cosmarium moniliforme var. moniliforme ((Turpin) Ralfs)
 * Cosmarium moniliforme var. subpyriforme (W. and G. S. West)
 * Cosmarium monochrondrum (Nordst.)
 * Cosmarium monochrondrum var. monochrondrum (Nordst.)
 * Cosmarium monochrondrum var. rotundatum (Krieg. and Gerl.)
 * Cosmarium nasutum (Nordst.)
 * Cosmarium nasutum var. nasutum (Nordst.)
 * Cosmarium nasutum var. granulatum (Nordst.)
 * Cosmarium nitidulum (De Not)
 * Cosmarium nitidulum var. nitidulum (De Not)
 * Cosmarium nitidulum var. pseudovalidum (Taft)
 * Cosmarium norimbergense (Reinsch)
 * Cosmarium notabile (De Bary)
 * Cosmarium novaesemliae (Wille)
 * Cosmarium novaesemliae var. novaesemliae (Wille)
 * Cosmarium novaesemliae var. sibiricum (Boldt.)
 * Cosmarium obliquum (Nordst.)
 * Cosmarium obsoletum ((Hantz.) Reinsch)
 * Cosmarium obtusatum (Schidle)
 * Cosmarium ochthodes (Nordstedt)
 * Cosmarium ochthodes var. ochthodes (Nordstedt)
 * Cosmarium ochthodes var. amoebum (Turpin)
 * Cosmarium orbiculatum (Ralfs)
 * Cosmarium orbiculatum var. orbiculatum (Ralfs)
 * Cosmarium orbiculatum var. major (West and West)
 * Cosmarium ornatum (Ralfs)
 * Cosmarium orthostichum (Lundell)
 * Cosmarium orthostichum var. orthostichum (Lundell)
 * Cosmarium orthostichum var. pumilum (Lundell)
 * Cosmarium ovale (Ralfs)
 * Cosmarium ovale var. ovale (Ralfs)
 * Cosmarium ovale var. prescottii (Irenee-marie)
 * Cosmarium pachydermum (Lundell)
 * Cosmarium pachydermum var. pachydermum (Lundell)
 * Cosmarium pachydermum var. aethiopicum (West and West)
 * Cosmarium pachydermum var. minus (Nordstedt)
 * Cosmarium pachydermum var. complanatum (Scott and Gronblad)
 * Cosmarium perforatum (Lundell)
 * Cosmarium pericymatium (Nordstedt)
 * Cosmarium pokornyanum ((Grunow) Werst and West)
 * Cosmarium portianum (Archer)
 * Cosmarium portianum var. portianum (Archer)
 * Cosmarium portianum var. nephroideum (Wittrock)
 * Cosmarium praegrande (Lundell)
 * Cosmarium protractum ((Naeg.) De Bary)
 * Cosmarium pseudamoenum (Wille)
 * Cosmarium pseudamoenum var. pseudamoenum (Wille)
 * Cosmarium pseudamoenum var. basilare (Nordstedt)
 * Cosmarium pseudarctoum (Nordstedt)
 * Cosmarium pseudatlantoideum (Turpin)
 * Cosmarium pseudobroomei (Wolle)
 * Cosmarium pseudoconnatum (Nordstedt)
 * Cosmarium pseudoconnatum var. pseudoconnatum (Nordstedt)
 * Cosmarium pseudoconnatum var. major (Wille)
 * Cosmarium pseudoexiguum (Racib.)
 * Cosmarium pseudoholmii (Borge)
 * Cosmarium pseudonitidulum (Nordstedt)
 * Cosmarium pseudonitidulum var. pseudonitidulum (Nordstedt)
 * Cosmarium pseudonitidulum var. validum (West and West)
 * Cosmarium pseudoprotuberans (Kirchn.)
 * Cosmarium pseudopyramidatum (Lund.)
 * Cosmarium pseudopyramidatum var. pseudopyramidatum (Lund.)
 * Cosmarium pseudopyramidatum var. stenonotum (Nordst.)
 * Cosmarium pseudotaxichondrum (Nordst.)
 * Cosmarium pseudotaxichondrum var. pseudotaxichondrum (Nordst.)
 * Cosmarium pseudotaxichondrum var. floridense (West and West)
 * Cosmarium pseudotaxichondrum var. foggii (Taylor)
 * Cosmarium punctulatum (Brebisson)
 * Cosmarium punctulatum var. punctulatum (Brebisson)
 * Cosmarium punctulatum var. subpunctulatum ((Nordstedt) Borges)
 * Cosmarium pusillum ((Brebisson) Archer)
 * Cosmarium pygmaeum (Archer)
 * Cosmarium pyramidatum (Brebisson)
 * Cosmarium pyramidatum var. pyramidatum (Brebisson)
 * Cosmarium pyramidatum var. canadense (Bourrelly)
 * Cosmarium pyramidatum var. borgei (Krieger and Gerloff)
 * Cosmarium pyramidatum var. stenonotum ((Nordstedt) Klebs)
 * Cosmarium pyramidatum var. stephani (Irenee-marie)
 * Cosmarium quadratum (Ralfs)
 * Cosmarium quadratulum ((Gay) De Toni)
 * Cosmarium quadrifarium (Lundell)
 * Cosmarium quadrifarium var. quadrifarium (Lundell)
 * Cosmarium quadrifarium var. hexasticha ((Lundell) Nordstedt)
 * Cosmarium quadrifarium var. polysticha (West and West)
 * Cosmarium quadrum (Lundell)
 * Cosmarium quadrum var. quadrum (Lundell)
 * Cosmarium quadrum var. minus (Nordstedt)
 * Cosmarium quinarium (Lundell)
 * Cosmarium radiosum (Wolle)
 * Cosmarium ralfsii (Brebisson)
 * Cosmarium ralfsii var. ralfsii (Brebisson)
 * Cosmarium ralfsii var. montanum (Raciborski)
 * Cosmarium rectangulare (Grunow)
 * Cosmarium rectangulare var. rectangulare (Grunow)
 * Cosmarium rectangulare var. cambrense ((Turner) West and West)
 * Cosmarium rectangulare var. hexagonum ((Elfv.) West and West)
 * Cosmarium regnellii (Wille)
 * Cosmarium regnellii var. regnellii (Wille)
 * Cosmarium regnellii var. catenatum ((Krieger) Krieger and Gerloff)
 * Cosmarium regnellii var. minimum (Ehrenberg)
 * Cosmarium regnesi (Reinsch)
 * Cosmarium reniforme ((Ralfs) Archer)
 * Cosmarium reniforme var. reniforme ((Ralfs) Archer)
 * Cosmarium reniforme var. compressum (Nordst.)
 * Cosmarium reniforme var. seminudum (Taft)
 * Cosmarium sexangulare (Lundell)
 * Cosmarium sexangulare var. sexangulare (Lundell)
 * Cosmarium sexangulare var. minus (Roy and Biss.)
 * Cosmarium sexnotatum (Gutw.)
 * Cosmarium simplicius ((West and West) Groenbl.)
 * Cosmarium speciosum (Lund.)
 * Cosmarium speciosum var. speciosum (Lund.)
 * Cosmarium speciosum var. biforme (Nordstedt)
 * Cosmarium speciosum var. rostafinskii ((Gutw.) West and West)
 * Cosmarium speciosum var. simplex (Nordstedt)
 * Cosmarium sphaeroideum (Turpin)
 * Cosmarium sphagnicolum (West and West)
 * Cosmarium sphagnicolum var. sphagnicolum (West and West)
 * Cosmarium sphagnicolum var. armatum (Krieger and Gerloff)
 * Cosmarium sphalerostichum (Nordstedt)
 * Cosmarium sportella (Brebisson)
 * Cosmarium subarctoum ((Legerh.) Racib.)
 * Cosmarium subaversum (Borge)
 * Cosmarium subbalteum (Schm.)
 * Cosmarium subbalteum var. subbalteum (Schm.)
 * Cosmarium subbalteum var. minor (Carter)
 * Cosmarium subcostatum (Nordstedt)
 * Cosmarium subcostatum var. subcostatum (Nordstedt)
 * Cosmarium subcostatum var. beckii ((Gutw.) West and West)
 * Cosmarium subcostatum var. minor (Turpin)
 * Cosmarium subcrenatum (Hantz.)
 * Cosmarium subcucumis (Schmidle)
 * Cosmarium subdanicum (Turpin)
 * Cosmarium subdrepressum (West and West)
 * Cosmarium subimpressulum (Borge)
 * Cosmarium subprotumidum (Nordstedt)
 * Cosmarium subretusiforme (West and West)
 * Cosmarium subspeciosum (Nordstedt)
 * Cosmarium subspeciosum var. subspeciosum (Nordstedt)
 * Cosmarium subspeciosum var. validius (Nordstedt)
 * Cosmarium subtumidum (Nordstedt)
 * Cosmarium subtumidum var. subtumidum (Nordstedt)
 * Cosmarium subtumidum var. klebsii ((Gutw.) W. and G. S. West)
 * Cosmarium succisum (G. West)
 * Cosmarium supraspeciosum (Wolle)
 * Cosmarium tatricum (Racib.)
 * Cosmarium taxichondriforme (Ehrenberg)
 * Cosmarium taxichondrum (Lund.)
 * Cosmarium tenue (Archer)
 * Cosmarium tetragonum ((Naeg.) Archer)
 * Cosmarium tetragonum var. tetragonum ((Naeg.) Archer)
 * Cosmarium tetragonum var. davidsonii ((Roy and Biss.) West and West)
 * Cosmarium tetraophthalmum (Brebisson)
 * Cosmarium tinctum (Ralfs)
 * Cosmarium trachypleurum (Lund.)
 * Cosmarium trilobulatum (Reinsch)
 * Cosmarium triplicatum (Wolle)
 * Cosmarium truncatellum ((Perty) Rabh.)
 * Cosmarium tumidum (Lund.)
 * Cosmarium turpinii (Brebisson)
 * Cosmarium turpinii var. turpinii (Brebisson)
 * Cosmarium turpinii var. eximium (West and West)
 * Cosmarium turpinii var. podolicum (Gutw.)
 * Cosmarium tyrolicum ((Nordst.) Krieg. and Gerloff)
 * Cosmarium umbilicatum (Luetkem.)
 * Cosmarium undulatum var. minutum (Wittrock)
 * Cosmarium variolatum (Lund.)
 * Cosmarium variolatum var. variolatum (Lund.)
 * Cosmarium variolatum var. cataractarum (Racib.)
 * Cosmarium venustum ((Brebisson) Archer)
 * Cosmarium venustum var. venustum ((Brebisson) Archer)
 * Cosmarium venustum var. excavatum ((Eichl. and Gutw.) West and West)
 * Cosmarium wittrockii (Lund.)
 * Cosmarium abruptum (Lundell)
 * Cosmarium abruptum var. abruptum (Lundell)
 * Cosmarium abruptum var. granulatum (Turpin)
 * Cosmarium clepsydra (Nordstedt)
 * Cosmarium clepsydra var. clepsydra (Nordstedt)
 * Cosmarium clepsydra var. namum ()
 * Cosmarium denticulatum (Borge)
 * Cosmarium denticulatum var. denticulatum (Borge)
 * Cosmarium denticulatum var. ovule (Groenblad)
 * Cosmarium thwaitesii (Ralfs)
 * Cosmarium hornavanense (Ruzicka)
 * Cosmarium hornavanense var. hornavanense (Ruzicka)
 * Cosmarium hornavanense var. dubovianum ((Lutkm.) Ruzicka)
 * Cosmarium nordstedtii (Delfs)
 * Cosmarium panamense (Prescott)
 * Cosmarium pseudophyramidatum (Lundell)
 * Cosmarium pseudophyramidatum var. pseudophyramidatum (Lundell)
 * Cosmarium pseudophyramidatum var. lentiferum (Taylor)
 * Cosmarium ungerianum ((Naegeli) De Bary)
 * Cosmarium angulare (Johnson)
 * Cosmarium angulare var. angulare (Johnson)
 * Cosmarium angulare var. canadense (Irenee-marie)
 * Cosmarium bimmillatum ()
 * Cosmarium bimmillatum var. bimmillatum ()
 * Cosmarium bimmillatum var. evolutum (Bicudo)
 * Cosmarium batrytis (Borg)
 * Cosmarium candianum (Delponte)
 * Cosmarium candianum var. candianum (Delponte)
 * Cosmarium candianum var. latius (Croasdale)
 * Cosmarium decedens ((Reinsch) Raciborski)
 * Cosmarium mamilliferum (Nordst.)
 * Cosmarium marginatatum ()
 * Cosmarium marginatatum var. marginatatum ()
 * Cosmarium marginatatum var. minor ((Boldt) West and West)
 * Cosmarium miedrzyrzecense (Ehrenberg)
 * Cosmarium ocellatum ()
 * Cosmarium ocellatum var. ocellatum ()
 * Cosmarium ocellatum var. incrassatum (West and West)
 * Cosmarium phaseolus (Brebisson In Ralfs)
 * Cosmarium phaseolus var. phaseolus (Brebisson In Ralfs)
 * Cosmarium phaseolus var. achondrum (Boldt)
 * Cosmarium phaseolus var. elevatum (Nordstedt)
 * Cosmarium polonicum (Raciborski)
 * Cosmarium pseudoretusum ()
 * Cosmarium pseudoretusum var. pseudoretusum ()
 * Cosmarium pseudoretusum var. inaequalipellicum ((West and West) Krieger and Gerloff)
 * Cosmarium quadrilobum (Prescott and West)
 * Cosmarium repandum ()
 * Cosmarium scorbiculosum (Borge)
 * Cosmarium seelyanum (Wolle)
 * Cosmarium spinosporum (Lagerh.)
 * Cosmarium spinuliferum ()
 * Cosmarium spinuliferum var. spinuliferum ()
 * Cosmarium spinuliferum var. irregulare (Scott and Gronblad)
 * Cosmarium stichochondrum (Lagerh.)
 * Cosmarium subpulchellum (West and West)
 * Cosmarium transitorium ((Heimerl) Ducellier)
 * Cosmarium vexatum (West)
 * Cosmarium braunii ()
 * Cosmarium braunii var. braunii ()
 * Cosmarium braunii var. major (Riensch)
 * Cosmarium connatus (Kirchner)
 * Cosmarium connatus var. connatus (Kirchner)
 * Cosmarium connatus var. minor (Nordstedt)
 * Cosmarium orbiculum (Ralfs)
 * Cosmarium schleiphackeanum (Grunow)
 * Cosmarium porrectum (Nordst.)
 * Cosmarium logoense ((Nordst.) Nordst.)
 * Cosmarium lobatum (Borgesen)
 * Cosmarium lobatum var. lobatum (Borgesen)
 * Cosmarium lobatum var. ellipticum (Fr. and Rich.)
 * Cosmarium aspherosporum (Nordstedt)
 * Cosmarium aspherosporum var. aspherosporum (Nordstedt)
 * Cosmarium aspherosporum var. montanense (Sieminska)
 * Cosmarium cymatopleurum (West)
 * Cosmarium cymatopleurum var. cymatopleurum (West)
 * Cosmarium cymatopleurum var. concavum (Sieminska)
 * Cosmarium intermedium (Delponte)
 * Cosmarium pulchellum ()
 * Cosmarium margaritaceum ((Lund.) Roy and Bisset)
 * Cosmarium margaritaceum var. margaritaceum (Messikommer)
 * Cosmarium margaritaceum var. minor ((Boldt) West and West)
 * Cosmarium margaritaceum var. pseudoconspersum (Dick)
 * Cosmarium margaritaceum var. subrotundata (West and West)
 * Cosmarium nymannianum (Groenblad)
 * Cosmarium obtusum (Schmidle)
 * Cosmarium plicatum (Reinsch)
 * Cosmarium pseudoornatum (Ehrenberg)
 * Cosmarium quasillus (Lundell)
 * Cosmarium subadoxum (Groenblad)
 * Cosmarium subadoxum var. subadoxum (Groenblad)
 * Cosmarium subadoxum var. dentatum (Sieminska)
 * Cosmarium subochthodes (Schmidle)
 * Cosmarium subnudiceps (W. and G. S. West)
 * Cosmarium subnudiceps var. subnudiceps (W. and G. S. West)
 * Cosmarium subnudiceps var. granulatum (Taft)
 * Cosmarium subnudiceps var. subraciborskii (Taft)
 * Cosmarium geometricum (W. and G. S. West)
 * Cosmarium geometricum var. geometricum (W. and G. S. West)
 * Cosmarium geometricum var. suecicum (Borge)
 * Cosmarium fontigenum (Nordstedt)
 * Cosmarium franzstonii (Taft)
 * Cosmarium eriense (Taft)
 * Cosmarium favum (W. and G. S. West)
 * Cosmarium aphanichondrum (Nordstedt)
 * Cosmarium bipunctatum (Boergesen)
 * Cosmarium bireme (Nordstedt)
 * Cosmarium biretum (De Brebisson)
 * Cosmarium biretum var. biretum (De Brebisson)
 * Cosmarium biretum var. minus ()
 * Cosmarium biretum var. trigibberum ()
 * Cosmarium angulosum var. angulosum (Brebisson)
 * Cosmarium angulosum var. concinnum ((Rabh.) West and West)
 * Cosmarium bioculatum var. bioculatum (Brebisson)
 * Cosmarium bioculatum var. depressum ((Schaarschm.) Schmidle)
 * Cosmarium bioculatum var. excavatum (Gutw.)
 * Cosmarium blytti var. bipunctatum ((Brebisson) West and West)
 * Cosmarium blytti var. hoffii (Borg.)
 * Cosmarium connatum var. connatum (Brebisson)
 * Cosmarium connatum var. minus (Wolle)
 * Cosmarium contractum var. minutum (Scott and Prescott)
 * Cosmarium galeritum var. galeritum (Nordstedt)
 * Cosmarium galeritum var. subtumidum (Borge)
 * Cosmarium granatum var. concavum (Lagerh.)
 * Cosmarium nitidulum var. javanicum (Krieg)
 * Cosmarium anisochondrum (Nordst.)
 * Cosmarium anisochondrum var. anisochondrum (Nordst.)
 * Cosmarium anisochondrum var. geminatum (Messik.)
 * Cosmarium majae (Strom)
 * Cosmarium regnesi var. regnesi (Reinsch)
 * Cosmarium regnesi var. montanum (Schmidle)
 * Cosmarium undulatum var. undulatum (Ralfs, 1848)

Desmidium 
 Desmidium (C. Agardh)
 Desmidium aequale (West and West)
 Desmidium aptogonum (Woloszynska)
 Desmidium aptogonum var. aptogonum ((Ehrenberg) Brebisson)
 Desmidium aptogonum var. acutius (Nordstedt)
 Desmidium baileyi ((Ralfs) Nordstedt)
 Desmidium baileyi var. baileyi ((Ralfs) Nordstedt)
 Desmidium baileyi var. indicum (Turner)
 Desmidium coarctatum (Nordstetd)
 Desmidium coarctatum var. coarctatum (Nordstetd)
 Desmidium coarctatum var. cambricum (G. West)
 Desmidium cylindricum (Grev.)
 Desmidium gracileps ((Nordstetd) Lagerh.)
 Desmidium longatum (Wolle)
 Desmidium pseudostreptonema (West and West)
 Desmidium quadratum (Nordstetd)
 Desmidium swartzii (Ca. A. Agardh Ex Ralfs)
 Desmidium gymnozygoforme (Prescott and Scott)
 Desmidium asymmetricum (Gronbl.)
 Desmidium grevillii ((Kuetzing) De Bary)
 Desmidium occidentale (West and West)

Euastrum 
 Euastrum (Ehrenberg)
 Euastrum ampullaceum (Ralfs)
 Euastrum abruptum (Nordstedt)
 Euastrum abruptum var. abruptum (Nordstedt)
 Euastrum abruptum var. rectangulare (Prescott)
 Euastrum abruptum var. subglaziovii (Krieger)
 Euastrum abruptum var. minor (West and West)
 Euastrum abruptum var. lagoense (West and West)
 Euastrum affine (Ralfs)
 Euastrum affine var. affine (Ralfs)
 Euastrum affine var. equilaterale (Prescott and Scott)
 Euastrum ansatum (Ehrenberg)
 Euastrum ansatum var. ansatum (Ehrenberg)
 Euastrum ansatum var. dideltiforme (Ducell.)
 Euastrum ansatum var. javanicum ((Gutw.) Krieger)
 Euastrum ansatum var. lithuanicum ()
 Euastrum ansatum var. pyxidatum (Delponte)
 Euastrum ansatum var. concavum (Krieger)
 Euastrum ansatum var. triporum (Krieger)
 Euastrum bidentatum (Naegeli)
 Euastrum bidentatum var. bidentatum (Naegeli)
 Euastrum bidentatum var. speciosum ((Boldt) Schmidle)
 Euastrum binale ((Turpin) Ehrenberg)
 Euastrum binale var. binale ((Turpin) Ehrenberg)
 Euastrum binale var. hians (Turpin)
 Euastrum binale var. sectum (Turner)
 Euastrum binale var. gutwinskii ((Schmidle) Krieger)
 Euastrum crassangulatum (Borgs.)
 Euastrum crassicolle (Lundell)
 Euastrum crassum ((Brebisson) Kuetz.)
 Euastrum crassum var. crassum ((Brebisson) Kuetz.)
 Euastrum crassum var. michiganense (Prescott)
 Euastrum crassum var. scrobiculatum (Lundell)
 Euastrum crassum var. microcephalum (Krieger)
 Euastrum crassum var. tumidum ()
 Euastrum denticulatum ((Kirchn.) Gay)
 Euastrum denticulatum var. denticulatum ((Kirch.) Gay)
 Euastrum denticulatum var. dangeardii (Le Porte)
 Euastrum didelta (Ralfs)
 Euastrum didelta var. didelta (Ralfs)
 Euastrum didelta var. everettenseiforme (Ducellier)
 Euastrum didelta var. truncatum (Krieger)
 Euastrum divaricatum (Lundell)
 Euastrum dubium (Naegeli)
 Euastrum dubium var. dubium (Naegeli)
 Euastrum dubium var. scorbiculatum (Luetkemueller)
 Euastrum dubium var. ornatum (Woloszynska)
 Euastrum elegans ((Brebisson) Kuetz.)
 Euastrum elegans var. elegans ((Brebisson) Kuetz.)
 Euastrum elegans var. novaesemliae (Wille)
 Euastrum elegans var. ornatum (Turpin)
 Euastrum elegans var. pseudoelegans ((Turner) West and West)
 Euastrum elegans var. compactum ((Wolle) Krieger)
 Euastrum elobatum ((Lundell) Roy and Biss.)
 Euastrum elobatum var. elobatum ((Lundell) Roy and Biss.)
 Euastrum elobatum var. subelobatum ((W. West) Kossinsk.)
 Euastrum erosum (Lundell)
 Euastrum evolutum ((Nordstedt) West and West)
 Euastrum evolutum var. evolutum ((Nordstedt) West and West)
 Euastrum evolutum var. guianense ((Racib.) West and West)
 Euastrum evolutum var. graziovii ((Borges) West and West)
 Euastrum evolutum var. integris (West and West)
 Euastrum evolutum var. poriferum (Prescott and Scott)
 Euastrum gemmatum (Brebisson)
 Euastrum gemmatum var. gemmatum (Brebisson)
 Euastrum gemmatum var. alatum (Kossinskaja)
 Euastrum humerosum (Ralfs)
 Euastrum humerosum var. humerosum (Ralfs)
 Euastrum humerosum var. evolutum (Krieger)
 Euastrum inerme ((Ralfs) Lundell)
 Euastrum insulare ((Wittr.) Roy)
 Euastrum insulare var. insulare ((Wittr.) Roy)
 Euastrum insulare var. lacustre ((Messik.) Krieger)
 Euastrum insulare var. silesiacum ()
 Euastrum insulare var. basichondrum (Messikommer)
 Euastrum intermedium (Cleve)
 Euastrum intermedium var. intermedium (Cleve)
 Euastrum intermedium var. longicolle (Borge)
 Euastrum intermedium var. scrobiculatum (Schmidle)
 Euastrum montanum (West and West)
 Euastrum obesum (Josh.)
 Euastrum oblongum ((Grev.) Ralfs)
 Euastrum oblongum var. oblongum ((Grev.) Ralfs)
 Euastrum oblongum var. cephalophorum (Turpin)
 Euastrum occidentale (West and West)
 Euastrum pectinatum (Brebisson)
 Euastrum pectinatum var. pectinatum (Brebisson)
 Euastrum pectinatum var. inevolutum (West and West)
 Euastrum pectinatum var. brachylobum (Wittr.)
 Euastrum pectinatum var. reductum (Taylor)
 Euastrum pectinatum var. rostratum (Taylor)
 Euastrum pinnatum (Ralfs)
 Euastrum pinnatum var. pinnatum (Ralfs)
 Euastrum pinnatum var. taylori (Krieger)
 Euastrum pinnatum var. capitatum (Krieger)
 Euastrum pinnatum var. reductum (Krieger)
 Euastrum pinnatum var. subpinnatum ((Schmidle) West and West)
 Euastrum pinnatum var. turbinatum (Jackson)
 Euastrum pulchellum (Brebisson)
 Euastrum sinuosum (Lenorm.)
 Euastrum sinuosum var. sinuosum (Lenorm.)
 Euastrum sinuosum var. reductum (West and West)
 Euastrum sinuosum var. dideltoides ()
 Euastrum sinuosum var. parallelum (Krieger)
 Euastrum sinuosum var. subjenneri (West and West)
 Euastrum sinuosum var. ceylanicum (West and West)
 Euastrum sinuosum var. scrobiculatum (Nordstedt)
 Euastrum sinuosum var. aboense ((Elfv.) Cedergren)
 Euastrum sublobatum (Brebisson)
 Euastrum sublobatum var. sublobatum (Brebisson)
 Euastrum sublobatum var. kriegeri ()
 Euastrum trigibberum (West and West)
 Euastrum turneri (Turpin)
 Euastrum validum (West and West)
 Euastrum validum var. validum (West and West)
 Euastrum validum var. glabrum (Krieger)
 Euastrum ventricosum (Lundell)
 Euastrum ventricosum var. ventricosum (Lundell)
 Euastrum ventricosum var. glabrum (Prescott and Scott)
 Euastrum ventricosum var. rectangulare (Prescott and Scott)
 Euastrum ventricosum var. sopchoppiense (Scott and Prescott)
 Euastrum verrucosum (Ehrenberg)
 Euastrum verrucosum var. verrucosum (Ehrenberg)
 Euastrum verrucosum var. alatum (Wolle)
 Euastrum verrucosum var. coarctatum (Delp.)
 Euastrum verrucosum var. planctonicum (West and West)
 Euastrum verrucosum var. reductum (Nordstedt)
 Euastrum verrucosum var. schoenavii (Kaiser)
 Euastrum verrucosum var. rhomboideum ()
 Euastrum verrucosum var. subalatum (Huber-pestalozzi)
 Euastrum attenuatum ()
 Euastrum attenuatum var. attenuatum ()
 Euastrum attenuatum var. lithuanicum ()
 Euastrum attenuatum var. puchellum ((Prescott and Scott) Bourrelly)
 Euastrum attenuatum var. splendns ((Fritsch and Rich) Groenblat)
 Euastrum incavatum ()
 Euastrum incavatum var. incavatum ()
 Euastrum incavatum var. floridense (Scott and Gronblad)
 Euastrum insigne ()
 Euastrum insigne var. insigne ()
 Euastrum insigne var. lobulatum (Prescott and Scott)
 Euastrum insigne var. lacustre ((Messik) Krieger)
 Euastrum insigne var. silesiacum ()
 Euastrum johnsonii ()
 Euastrum johnsonii var. johnsonii ()
 Euastrum johnsonii var. nudum (Prescott)
 Euastrum oculatum ()
 Euastrum oculatum var. oculatum ()
 Euastrum oculatum var. tonsum (West and West)
 Euastrum quadrilobum (Scott and Gronblad)
 Euastrum sibiricum ()
 Euastrum sibiricum var. sibiricum ()
 Euastrum sibiricum var. exsectum ((Gronblad) Krieger)
 Euastrum sibiricum var. reductum (Prescott and Scott)
 Euastrum spinulosum (Delponte)
 Euastrum subhexalobum (West and West)
 Euastrum subhexalobum var. subhexalobum (West and West)
 Euastrum subhexalobum var. scrobiculatum (Gronblad)
 Euastrum wollei (Lagerh.)
 Euastrum wollei var. wollei (Lagerh.)
 Euastrum wollei var. pearlingtonense (Prescott and Scott)
 Euastrum wollei var. cuspidatum (Wolle)
 Euastrum unicocca (Sm.)
 Euastrum ciastonii (Raciborski)
 Euastrum ciastonii var. ciastonii (Raciborski)
 Euastrum ciastonii var. apertisinuatum (Scott and Prescott)
 Euastrum lapponicum (Schmidle)
 Euastrum magnificum (Wolle)
 Euastrum monotanum ()
 Euastrum lutkemulleri (Ducellier)
 Euastrum rostratum (Ralfs)
 Euastrum obeseum (Prescott and Scott)
 Euastrum obeseum var. obeseum (Prescott and Scott)
 Euastrum obeseum var. crassum (Prescott and Scott)
 Euastrum everettense (Wolle)
 Euastrum everettense var. everettense (Prescott and Scott)
 Euastrum gayanum (De Toni)
 Euastrum prescottii (Jackson)
 Euastrum luetkemuelleri (Ducellier)
 Euastrum luetkemuelleri var. luetkemuelleri (Ducellier)
 Euastrum luetkemuelleri var. carniolicum ((Luetkem.) Krieger)
 Euastrum quebecense (Irenee-marie)
 Euastrum ohioense (Taft)

Groenbladia 
 Groenbladia (E. Teiling, 1952)
 Groenbladia taylori (E. Teiling, 1952)
 Groenbladia neglecta ((Raciborski) Teiling)
 Groenbladia neglecta var. neglecta ((Raciborski) Teiling)
 Groenbladia neglecta var. elongata (Scott and Gronblad)

Hyalotheca 
 Hyalotheca (Ehrenberg)
 Hyalotheca mucosa ((Dillw.) Ehrenberg)
 Hyalotheca dissiliens ((Smith) Brebisson)
 Hyalotheca dissiliens var. dissiliens ((Smith) Brebisson)
 Hyalotheca dissiliens var. hians (Wolle)
 Hyalotheca dissiliens var. tatrica (Racib.)
 Hyalotheca dissiliens var. minor (Delponte)
 Hyalotheca undulata (Nordstetd)
 Hyalotheca dubia ()
 Hyalotheca neglecta (Racib.)
 Hyalotheca indica (Turner)
 Hyalotheca laevicincta (Taylor)

Micrasterias 
 Micrasterias (C. A. Agardh Ex Ralfs, 1848)
 * Micrasterias americana ((Ehrenberg) Ralfs)
 * Micrasterias americana var. americana ((Ehrenberg) Ralfs)
 * Micrasterias americana var. boldtii (Gutw. Ralfs)
 * Micrasterias decemdentata ()
 * Micrasterias denticulata (Brebisson)
 * Micrasterias denticulata var. denticulata (Brebisson)
 * Micrasterias denticulata var. angulosa ((Hantz.) West and West)
 * Micrasterias denticulata var. taylori (Krieger)
 * Micrasterias fimbriata (Ralfs)
 * Micrasterias fimbriata var. fimbriata (Ralfs)
 * Micrasterias fimbriata var. spinosa (Bisset)
 * Micrasterias radiata (Hass.)
 * Micrasterias radiata var. radiata (Hass.)
 * Micrasterias radiata var. gracillima (G. M. Smith)
 * Micrasterias radiata var. simplex (Wolle)
 * Micrasterias radiata var. dichotoma ((Wolle) Cushman)
 * Micrasterias radiata var. elegantior ((G. S. West) Croasdale)
 * Micrasterias radiata var. swainei ((Hast.) West and West)
 * Micrasterias rotata ((Greville) Ralfs)
 * Micrasterias rotata var. rotata ((Greville) Ralfs)
 * Micrasterias rotata var. evoluta (Turner)
 * Micrasterias rotata var. nuda (Wolle)
 * Micrasterias sol ((Ehrenberg) Kuetzing)
 * Micrasterias sol var. sol ((Ehrenberg) Kuetzing)
 * Micrasterias sol var. ornata (Nordst.)
 * Micrasterias sol var. murrayi ((W. West and G. S. West) Allorge)
 * Micrasterias thomasiana (Archer)
 * Micrasterias thomasiana var. thomasiana (Archer)
 * Micrasterias thomasiana var. notata ((Nordst.) Groenbl.)
 * Micrasterias thomasiana var. pulcherrima (G. S. West)
 * Micrasterias abrupta (West and West)
 * Micrasterias apiculata ((Ehrenberg) Menegh.)
 * Micrasterias apiculata var. apiculata ((Ehrenberg) Menegh.)
 * Micrasterias apiculata var. fimbriata ((Ralfs) Nordst.)
 * Micrasterias conferta (Lundell)
 * Micrasterias conferta var. conferta (Lundell)
 * Micrasterias conferta var. hamata (Wolle)
 * Micrasterias cruxmelitensis ((Ehrenberg) Hass.)
 * Micrasterias cruxmelitensis var. cruxmelitensis ((Ehrenberg) Hass.)
 * Micrasterias cruxmelitensis var. simplex (Borge)
 * Micrasterias depauperata (Nordst.)
 * Micrasterias depauperata var. depauperata (Nordst.)
 * Micrasterias depauperata var. kitchelii ((Wolle) West and West)
 * Micrasterias depauperata var. wollei (Cushman)
 * Micrasterias laticeps (Nordst.)
 * Micrasterias laticeps var. laticeps (Nordst.)
 * Micrasterias laticeps var. crassa (Prescott)
 * Micrasterias mahabuleshwarensis (Hobson)
 * Micrasterias mahabuleshwarensis var. mahabuleshwarensis (Hobson)
 * Micrasterias mahabuleshwarensis var. serrulata ((Wolle) G. Smith)
 * Micrasterias mahabuleshwarensis var. rigens ((Bailey) Krieger)
 * Micrasterias mahabuleshwarensis var. dichotoma (G. M. Smithieger)
 * Micrasterias muricata ((Bail.) Ralfs)
 * Micrasterias oscitans (Ralfs)
 * Micrasterias oscitans var. oscitans (Ralfs)
 * Micrasterias oscitans var. mucronata ((Dixon) Wille)
 * Micrasterias papillifera (Brebisson)
 * Micrasterias papillifera var. papillifera (Brebisson)
 * Micrasterias papillifera var. glabra ((Nordst.) Dick.)
 * Micrasterias papillifera var. murrayi ((West and West) Kossinsk.)
 * Micrasterias papillifera var. speciosa ((Wolle) Krieger)
 * Micrasterias pinnatifida ((Kuetzing) Ralfs)
 * Micrasterias pinnatifida var. pinnatifida ((Kuetzing) Ralfs)
 * Micrasterias pinnatifida var. pseudoscitans (Groenblad)
 * Micrasterias truncata ((Brebisson) West and West)
 * Micrasterias truncata var. truncata ((Brebisson) West and West)
 * Micrasterias truncata var. crenata ((Brebisson) Reinsch)
 * Micrasterias truncata var. quadrata (Bulnh Reinsch)
 * Micrasterias truncata var. semiradiata ((Nageli) Cleveeinsch)
 * Micrasterias truncata var. pusilla (G. S. West Reinsch)
 * Micrasterias truncata var. convexa (Prescott)
 * Micrasterias truncata var. mauriciana (Irenee-marie)
 * Micrasterias truncata var. neodamensis ((Braun) Dick)
 * Micrasterias truncata var. uralensis (Krieger)
 * Micrasterias radiosa (Ralfs)
 * Micrasterias radiosa var. radiosa (Ralfs)
 * Micrasterias radiosa var. extensa (Prescott and Scott)
 * Micrasterias radiosa var. ornata ()
 * Micrasterias foliacea (Bailey)
 * Micrasterias foliacea var. foliacea (Bailey)
 * Micrasterias foliacea var. ornata (Nordstedt)
 * Micrasterias furcata ((Agardh) Ralfs)
 * Micrasterias johnsonii (Turpin)
 * Micrasterias johnsonii var. johnsonii (Turpin)
 * Micrasterias johnsonii var. ranoides ((Salisb.) Krieger)
 * Micrasterias pseudofurcata (Wolle)
 * Micrasterias pseudofurcata var. pseudofurcata (Wolle)
 * Micrasterias pseudofurcata var. minor (Wolle)
 * Micrasterias arcuata ((Bailey) Nordst.)
 * Micrasterias arcuata var. arcuata ((Bailey) Nordst.)
 * Micrasterias arcuata var. robusta (Borge)
 * Micrasterias jenneri (Ralfs)
 * Micrasterias jenneri var. jenneri (Ralfs)
 * Micrasterias jenneri var. simplex (West)
 * Micrasterias piquata (Salisbury)
 * Micrasterias tetraptera (West and West)
 * Micrasterias tetraptera var. tetraptera (West and West)
 * Micrasterias tetraptera var. angulosa ()
 * Micrasterias torreyi (Bailey and Ralfs)
 * Micrasterias triangularis (Wolle)
 * Micrasterias verrucosa (Bisset In Roy and Bisset)
 * Micrasterias brachyptera (Lundell)
 * Micrasterias radians (Turner)
 * Micrasterias pygmaeum ((Brebisson) West and West)
 * Micrasterias pygmaeum var. pygmaeum ((Brebisson) West and West)
 * Micrasterias pygmaeum var. monile ((Turner) West and West)

Penium 
 Penium (Brebisson Ex Ralfs. 1848)
 Penium cylindrus ((Ehrenberg) Brebisson)
 Penium cylindrus var. cylindrus ((Ehrenberg) Brebisson)
 Penium cylindrus var. subtruncatum (Schmidle)
 Penium exiguum ()
 Penium libellula ()
 Penium spinospermum ()
 Penium spirostriolatum (Barker)
 Penium margaritaceum ((Ehrenberg) Brebisson)
 Penium margaritaceum var. margaritaceum ((Ehrenberg) Brebisson)
 Penium margaritaceum var. elongatum (Klebs)
 Penium minutum ()
 Penium didymocarpum (Lundell)
 Penium polymorphum (Perty)
 Penium phymatosporum (Nordst.)
 Penium spinulosum ((Wolle) Gerrath)
 Penium silvaenigrae (Rabanus)
 Penium silvaenigrae var. silvaenigrae (Rabanus)
 Penium silvaenigrae var. parallelum (Krieger)
 Penium oblongum (De Bary)
 Penium rupestre (Kuetzing)
 Penium costatum (Hodgetts)

Pleurotaenium 
 Pleurotaenium (Naegeli, 1849)
 Pleurotaenium trabecula ((Ehrenberg) Naegeli)
 Pleurotaenium trabecula var. trabecula ((Ehrenberg) Naegeli)
 Pleurotaenium trabecula var. crassum (Wittr.)
 Pleurotaenium trabecula var. elongatum (Cedergren)
 Pleurotaenium trabecula var. rectum ((Brebisson) West and West)
 Pleurotaenium trabecula var. maxima ((Reinsch) Roll.)
 Pleurotaenium trabecula var. truncatum ((Brebisson) Naegeli)
 Pleurotaenium ehrenbergii ((Brebisson) De Bary)
 Pleurotaenium ehrenbergii var. ehrenbergii ((Brebisson) De Bary)
 Pleurotaenium ehrenbergii var. attenuatum (Krieger)
 Pleurotaenium ehrenbergii var. undulatum (Schaarschmidt)
 Pleurotaenium gloriosum ()
 Pleurotaenium maximum ((Reinsch) Lundell)
 Pleurotaenium minutum ((Ralfs) Delp)
 Pleurotaenium minutum var. minutum ((Ralfs) Delp)
 Pleurotaenium minutum var. excavatum (Scott and Groenblad)
 Pleurotaenium minutum var. elongatum ((West and West) Cedergren)
 Pleurotaenium minutum var. gracile ((Wille) Krieger)
 Pleurotaenium nodosum ((Bailey) Lundell)
 Pleurotaenium nodosum var. nodosum ((Bailey) Lundell)
 Pleurotaenium nodosum var. borgei (Groenblad)
 Pleurotaenium subcoronulatum (Turner)
 Pleurotaenium subcoronulatum var. subcoronulatum (Turner)
 Pleurotaenium subcoronulatum var. dentum (West and West)
 Pleurotaenium tridentulum ()
 Pleurotaenium trochiscum (West and West)
 Pleurotaenium coronatum ((Brebisson) Rabenhorst)
 Pleurotaenium constrictum ((Bailey) Wood)
 Pleurotaenium baculoides ((Roy and Biss) Playfair)
 Pleurotaenium eugeneum ((Turner) West and West)
 Pleurotaenium eugeneum var. eugeneum ((Turner) West and West)
 Pleurotaenium eugeneum var. capense (Hodgetts)
 Pleurotaenium inconspicuum (West)
 Pleurotaenium indicum ((Grunow) Lundell)
 Pleurotaenium nodolosum ((Brebisson) Debary)

Phymatodocis 
 Phymatodocis (Nordstedt, 1877)
 Phymatodocis alternans ()
 Phymatodocis nordstedtiana ()

Sphaerozosma 
 Sphaerozosma (Corda Ex Ralfs, 1848)
 Sphaerozosma laeve ((Nordst.) Thom.)
 Sphaerozosma laeve var. laeve ((Nordst.) Thom.)
 Sphaerozosma laeve var. latum ((W. West) Tiel.)
 Sphaerozosma filiformis ((Ehrenberg) Bourrelly)
 Sphaerozosma vertebratum ((Brebisson) Ralfs)
 Sphaerozosma vertebratum var. vertebratum ((Brebisson) Ralfs)
 Sphaerozosma vertebratum var. minor (Turpin)
 Sphaerozosma wallichii (Jacobs)
 Sphaerozosma aubertianum (Turpin)
 Sphaerozosma aubertianum var. aubertianum (Turpin)
 Sphaerozosma aubertianum var. archeri ((Gutw.) West and West)
 Sphaerozosma exiguum (Turner)
 Sphaerozosma punctulatum (West and West)
 Sphaerozosma granulatum (Roy and Bissett)

Spinoclosterium 
 Spinoclosterium (C. Bernard, 1909)
 Spinoclosterium curvatum (C. Bernard, 1909)
 Spinoclosterium cuspidatum ((Bailey) Hirano)

Spinocosmarium 
 Spinocosmarium (Prescott and Scott, 1942)
 Spinocosmarium quadridens ((Wood) Prescott)

Spondylosium 
 Spondylosium (Brebisson Ex Ralfs, 1848)
 Spondylosium maniliforme (Gronblad)
 Spondylosium maniliforme var. maniliforme (Gronblad)
 Spondylosium maniliforme var. reniforme (Gronblad)
 Spondylosium planum ((Wolle) West and West)
 Spondylosium pulchrum ((Bailey) Archer)
 Spondylosium pygmaeum ((Brebisson) West and West)
 Spondylosium luetkemulleri (Groen.)
 Spondylosium nitens ((Wall.) Archer)
 Spondylosium nitens var. nitens ((Wall.) Archer)
 Spondylosium nitens var. triangulare (Turner)
 Spondylosium papillosum (West and West)
 Spondylosium puchellum (Archer)
 Spondylosium granulatum (Roy and Bisset)
 Spondylosium rectangulare ((Wolle) West and West)

Staurodesmus 
 Staurodesmus (Teiling, 1948)
 * Staurodesmus aristiferus ((Ralfs) Thom.)
 * Staurodesmus aristiferus var. aristiferus ((Ralfs) Thom.)
 * Staurodesmus aristiferus var. protuberans ((West and West) Teil.)
 * Staurodesmus aversus ((Lundell) Lillier)
 * Staurodesmus clepsydra ((Nordstedt) Teiling)
 * Staurodesmus connatus ((Lundell) Thom.)
 * Staurodesmus connatus var. connatus ((Lundell) Thom.)
 * Staurodesmus connatus var. validus (Turpin)
 * Staurodesmus convergens ((Ehrenberg) Teil.)
 * Staurodesmus convergens var. wollei (Irenee-marie)
 * Staurodesmus corniculatum ((Lundell) Teil.)
 * Staurastrum corniculatum (Lundell)
 * Staurodesmus crassus ((West and West) Florin)
 * Staurodesmus cuspidatus ((Brebisson) Teil.)
 * Staurodesmus cuspidatus var. cuspidatus ((Brebisson) Teil.)
 * Staurodesmus cuspidatus var. curvatum ((W. West) Tiel.)
 * Staurodesmus dejectus ((Brebisson) Teil.)
 * Staurodesmus dejectus var. dejectus ((Brebisson) Teil.)
 * Staurodesmus dejectus var. apiculatum ((Brebisson) Teil.)
 * Staurodesmus extensus ((Borge) Teil.)
 * Staurodesmus extensus var. extensus ((Borge) Teil.)
 * Staurodesmus extensus var. joshuae ((Gutw.) Teil.)
 * Staurodesmus glaber ((Ehrenberg) Teil.)
 * Staurodesmus glaber var. glaber ((Ehrenberg) Teil.)
 * Staurodesmus glaber var. ralfsii ((West and West) Teil.)
 * Staurodesmus grandis ((Brebisson) West and West)
 * Staurodesmus incus ((Brebisson) Teil.)
 * Staurodesmus incus var. incus ((Brebisson) Teil.)
 * Staurodesmus incus var. minor ((Brebisson) Hassall)
 * Staurodesmus incus var. ralfsii ((West and West) Teil.)
 * Staurodesmus indentatus ((West and West) Teiling)
 * Staurodesmus insignis ((Lundell) Teil)
 * Staurodesmus jaculiferus ((W. West) Teil.)
 * Staurodesmus lanceolatus ((Archer) Croasd.)
 * Staurodesmus mamillatus ((Nordst.) Teil.)
 * Staurodesmus megacanthus ((Lundell) Thunm.)
 * Staurodesmus megacanthus var. megacanthus ((Lundell) Thunm.)
 * Staurodesmus megacanthus var. scotius ((West and West) Lill.)
 * Staurodesmus mucronatus ((Ralfs) Croasd.)
 * Staurodesmus mucronatus var. mucronatus ((Ralfs) Croasd.)
 * Staurodesmus mucronatus var. subtriangularis ((West and West) Croasd.)
 * Staurodesmus omearii ((Archer) Teil.)
 * Staurodesmus pachyrhynchus ((Nordst.) Teil.)
 * Staurodesmus phimus ((Turner) Thom.)
 * Staurodesmus subpygmaeus ((W. West) Croasd.)
 * Staurodesmus subtriangularis ((Borge) Teil.)
 * Staurodesmus subulatus ((Kuetzing) Croasd.)
 * Staurodesmus subulatus var. subulatus ((Kuetzing) Croasd.)
 * Staurodesmus subulatus var. nordstedtii ((G. M. Smith) Teil.)
 * Staurodesmus triangularis ((Lagerheim) Teiling)
 * Staurodesmus triangularis var. triangularis ((Lagerheim) Teiling)
 * Staurodesmus triangularis var. rotundatus (Turpin)
 * Staurodesmus triangularis var. subparrallelus ((G. M. Smith) Teiling)
 * Staurodesmus constrictus ((G. M. Smith) Teiling)
 * Staurodesmus majusculus ((Wolle) Bourrelly)
 * Staurodesmus sellatus ()
 * Staurodesmus subvalidus ((Groenblad) Bourrelly)

Staurastrum 
 Staurastrum (Meyen Ex J. Ralfs, 1848)
 * Staurastrum connatum (Roy and Biss.)
 * Staurastrum apiculatum (Brebisson)
 * Staurastrum avicula (Brebisson)
 * Staurastrum chaetoceros ((Schroed.) Smith)
 * Staurastrum chaetoceros var. chaetoceros ((Schroed.) Smith)
 * Staurastrum chaetoceros var. triradiata (Jackson)
 * Staurastrum gracile (Ralfs)
 * Staurastrum gracile var. gracile (Ralfs)
 * Staurastrum gracile var. coronulatum (Boldt)
 * Staurastrum gracile var. nanum (Wille)
 * Staurastrum gracile var. elongatum (West and West)
 * Staurastrum arachne (Ralfs)
 * Staurastrum arachne var. arachne (Ralfs)
 * Staurastrum arachne var. arachnoides (Turpin)
 * Staurastrum arachne var. curvatum (Turpin)
 * Staurastrum arctiscon ((Ehrenberg) Lund.)
 * Staurastrum arctiscon var. arctiscon ((Ehrenberg) Lund.)
 * Staurastrum arctiscon var. glabrum (Turpin)
 * Staurastrum arctiscon var. truncatum (Irenee-marie)
 * Staurastrum aspinosum ()
 * Staurastrum aspinosum var. aspinosum ()
 * Staurastrum aspinosum var. verrucosum (G. M. Smith)
 * Staurastrum bieneanum (Rabh.)
 * Staurastrum bieneanum var. bieneanum (Rabh.)
 * Staurastrum bieneanum var. ellipticum (Wille)
 * Staurastrum botrophilum (Wolle)
 * Staurastrum brachiatum (Ralfs)
 * Staurastrum brasiliense (Nordst.)
 * Staurastrum brasiliense var. brasiliense (Nordst.)
 * Staurastrum brasiliense var. lundellii (West and West)
 * Staurastrum breviaculeatum ()
 * Staurastrum capitulum ()
 * Staurastrum cerastes (Lundell)
 * Staurastrum cerastes var. cerastes (Lundell)
 * Staurastrum cerastes var. triradiatum (G. M. Smith)
 * Staurastrum chaetoceras ((Shrod.) G. M. Smith)
 * Staurastrum cingulum ((W. West and G. S. West) G. M. Smith)
 * Staurastrum cingulum var. cingulum ((W. West and G. S. West) G. M. Smith)
 * Staurastrum cingulum var. obesum (G. M. Smith)
 * Staurastrum cingulum var. tortum (G. M. Smith)
 * Staurastrum comptum ()
 * Staurastrum cyrtocerum (Brebisson)
 * Staurastrum dejectum (Brebisson)
 * Staurastrum dejectum var. dejectum (Brebisson)
 * Staurastrum dejectum var. tellami (Turpin)
 * Staurastrum dejectum var. apiculatum ((Brebisson) Lundell)
 * Staurastrum dejectum var. patens (Nordstedt)
 * Staurastrum dejectum var. robustum ((Messik.) Jackson)
 * Staurastrum dilatatum (Ehrenberg)
 * Staurastrum dilatatum var. dilatatum (Ehrenberg)
 * Staurastrum dilatatum var. fusiforme (Jackson)
 * Staurastrum echinatum ()
 * Staurastrum elongatum (Barker)
 * Staurastrum floriferum ()
 * Staurastrum forticulatum (Lundell)
 * Staurastrum furcigerum (Brebisson)
 * Staurastrum furcigerum var. furcigerum (Brebisson)
 * Staurastrum furcigerum var. armigera ((Brebisson) Nordstedt)
 * Staurastrum furcigerum var. eustephanum ((Ehrenberg) Nordstedt)
 * Staurastrum glabrum ()
 * Staurastrum gladiosum (Turner)
 * Staurastrum gladiosum var. gladiosum (Turner)
 * Staurastrum gladiosum var. ornata (Laport)
 * Staurastrum hexacerum ((Ehrenberg) Wittr.)
 * Staurastrum hexacerum var. hexacerum ((Ehrenberg) Wittr.)
 * Staurastrum hexacerum var. aversum (West and West)
 * Staurastrum hirsutum ((Ehrenberg) Brebisson)
 * Staurastrum leptocladum (Nordstedt)
 * Staurastrum leptocladum var. leptocladum (Nordstedt)
 * Staurastrum leptocladum var. insigne (West and West)
 * Staurastrum leptocladum var. cornutum (Wille)
 * Staurastrum leptocladum var. denticulatum (G. M. Smith)
 * Staurastrum leptocladum var. sinuatum (Wolle)
 * Staurastrum leptocladum var. subinsigne ()
 * Staurastrum limneticum (Schmidle)
 * Staurastrum limneticum var. limneticum (Schmidle)
 * Staurastrum limneticum var. cornutum (G. M. Smith)
 * Staurastrum limneticum var. burmense (Turpin)
 * Staurastrum limneticum var. tetragona (G. M. Smith)
 * Staurastrum manfeldtii (Delp.)
 * Staurastrum manfeldtii var. manfeldtii (Delp.)
 * Staurastrum manfeldtii var. annulatum (West and West)
 * Staurastrum manfeldtii var. fluminense (Schumacher)
 * Staurastrum margaritaceum ((Ehrenberg) Menegh.)
 * Staurastrum margaritaceum var. margaritaceum ((Ehrenberg) Menegh.)
 * Staurastrum margaritaceum var. alpinum (Schm.)
 * Staurastrum margaritaceum var. robustum (West and West)
 * Staurastrum megacanthum (Lundell)
 * Staurastrum meriani (Reinsch)
 * Staurastrum minnesotense (Wolle)
 * Staurastrum minnesotense var. minnesotense (Wolle)
 * Staurastrum minnesotense var. depauperatum (Irenee-marie)
 * Staurastrum monticulosum (Brebisson)
 * Staurastrum muticum (Brebisson)
 * Staurastrum muticum var. muticum (Brebisson)
 * Staurastrum muticum var. minor (Wolle)
 * Staurastrum ophiura (Lundell)
 * Staurastrum ophiura var. ophiura (Lundell)
 * Staurastrum ophiura var. cambricum (West and West)
 * Staurastrum ophiura var. pentacerum (Wolle)
 * Staurastrum ophiura var. tetracerum (Wolle)
 * Staurastrum orbiculare (Ralfs)
 * Staurastrum orbiculare var. orbiculare (Ralfs)
 * Staurastrum orbiculare var. depressum (Roy and Biss.)
 * Staurastrum orbiculare var. extensum (Nordst.)
 * Staurastrum orbiculare var. hibernicum (West and West)
 * Staurastrum orbiculare var. ralfsii (West and West)
 * Staurastrum orbiculare var. protractum (Playfair)
 * Staurastrum ornithopodum ()
 * Staurastrum paradoxum (Meyer)
 * Staurastrum paradoxum var. paradoxum (Meyer)
 * Staurastrum paradoxum var. evolutum (West and West)
 * Staurastrum paradoxum var. longipes (Nordstedt)
 * Staurastrum paradoxum var. nodulosum (Turpin)
 * Staurastrum paradoxum var. parvum (Turpin)
 * Staurastrum pentacerum ((Wille) G. M. Smith)
 * Staurastrum pentacerum var. pentacerum ((Wille) G. M. Smith)
 * Staurastrum pentacerum var. major (G. M. Smith)
 * Staurastrum pentacerum var. obesum (G. M. Smith)
 * Staurastrum pentacerum var. tetracerum ((Wolle) G. M. Smith)
 * Staurastrum protectum (West and West)
 * Staurastrum protectum var. protectum (West and West)
 * Staurastrum protectum var. planctonicum (G. M. Smith)
 * Staurastrum punctulatum (Brebisson)
 * Staurastrum punctulatum var. punctulatum (Brebisson)
 * Staurastrum punctulatum var. kjellmani (Wille)
 * Staurastrum quadricuspinatum ()
 * Staurastrum ravenellii ()
 * Staurastrum rugosum (Irenee-marie)
 * Staurastrum rugosum var. rugosum (Irenee-marie)
 * Staurastrum rugosum var. coronulatum ((Wade) Jackson)
 * Staurastrum setigerum (Cleve)
 * Staurastrum setigerum var. setigerum (Cleve)
 * Staurastrum setigerum var. brevispinum (G. M. Smith)
 * Staurastrum setigerum var. pectinatum (Turpin)
 * Staurastrum setigerum var. alaskanum (Croasdale)
 * Staurastrum setigerum var. occidentale (West and West)
 * Staurastrum spiculiferum ()
 * Staurastrum sponglosum ()
 * Staurastrum subcruciatum (Cooke and Wills)
 * Staurastrum tetracerum (Ralfs)
 * Staurastrum tetracerum var. tetracerum (Ralfs)
 * Staurastrum tetracerum var. trigona (Lundell)
 * Staurastrum tetracerum var. validum (West and West)
 * Staurastrum tohopekaligense (Wolle)
 * Staurastrum tohopekaligense var. tohopekaligense (Wolle)
 * Staurastrum tohopekaligense var. trifurcata (Turpin)
 * Staurastrum trifidum (Turpin)
 * Staurastrum trifidum var. trifidum (Turpin)
 * Staurastrum trifidum var. inflexum (Turpin)
 * Staurastrum turgescens (De Not)
 * Staurastrum vestitum (Ralfs)
 * Staurastrum vestitum var. vestitum (Ralfs)
 * Staurastrum vestitum var. subanatinum ((Turpin) Ralfs)
 * Staurastrum alternans (Brebisson)
 * Staurastrum americanum ((W. West and G. S. West) G. M. Smith)
 * Staurastrum americanum var. americanum ((W. West and G. S. West) G. M. Smith)
 * Staurastrum americanum var. triradiatum (G. M. Smith)
 * Staurastrum americanum var. longiradiatum (G. M. Smith)
 * Staurastrum acarides (Nordst.)
 * Staurastrum aculeatum ((Ehrenberg) Menegh.)
 * Staurastrum anatinum (Cooke and Wills)
 * Staurastrum anatinum var. anatinum (Cooke and Wills)
 * Staurastrum anatinum var. biradiatum (Turpin)
 * Staurastrum anatinum var. denticulatum (G. M. Smith)
 * Staurastrum anatinum var. grande (West and West)
 * Staurastrum anatinum var. lagerheimii ((Schmidle) West and West)
 * Staurastrum anatinum var. curtum (G. M. Smith)
 * Staurastrum anatinum var. longibrachiatum (Turpin)
 * Staurastrum anatinum var. truncatum (West)
 * Staurastrum arcuatum (Nordstedt)
 * Staurastrum arcuatum var. arcuatum (Nordstedt)
 * Staurastrum arcuatum var. aciculiferum (West and West)
 * Staurastrum arcuatum var. guitanense (West)
 * Staurastrum arnellii (Boldt)
 * Staurastrum bicorne (Hauptfl.)
 * Staurastrum brachycerum (Brebisson)
 * Staurastrum brebissonii (Archer)
 * Staurastrum brebissonii var. brebissonii (Archer)
 * Staurastrum brebissonii var. brevispinum (Turpin)
 * Staurastrum brebissonii var. paucispinum (G. M. Smith)
 * Staurastrum brebissonii var. truncatum (Groenblad)
 * Staurastrum claviferum (Turpin)
 * Staurastrum clevei ((Wittr.) Roy and Biss.)
 * Staurastrum coarctatum (Brebisson)
 * Staurastrum coarctatum var. coarctatum (Brebisson)
 * Staurastrum coarctatum var. subcurtum (Nordstedt)
 * Staurastrum controversum (Brebisson)
 * Staurastrum crenulatum ((Naegeli) Delp.)
 * Staurastrum crenulatum var. crenulatum ((Naegeli) Delp.)
 * Staurastrum crenulatum var. timidulum (Insam and Krieger)
 * Staurastrum cuneatum (Wolle)
 * Staurastrum denticulatum ((Naegeli) Archer)
 * Staurastrum dispar (Brebisson)
 * Staurastrum disputatum (West and West)
 * Staurastrum distentum (Wolle)
 * Staurastrum duacense (West and West)
 * Staurastrum dubium (Turpin)
 * Staurastrum eboracense (Turner)
 * Staurastrum fissum (Turner)
 * Staurastrum furcatum ((Ehrenberg) Brebisson)
 * Staurastrum gemelliparum (Nordst.)
 * Staurastrum grallatorium (Nordst.)
 * Staurastrum grallatorium var. grallatorium (Nordst.)
 * Staurastrum grallatorium var. forcipigerum (Lagerheim)
 * Staurastrum granulosum ((Ehrenberg) Ralfs)
 * Staurastrum hystrix (Ralfs)
 * Staurastrum inconspicuum (Nordstedt)
 * Staurastrum inconspicuum var. inconspicuum (Nordstedt)
 * Staurastrum inconspicuum var. crassum (Gay)
 * Staurastrum inflexum (Brebisson)
 * Staurastrum iotanum (Wolle)
 * Staurastrum iotanum var. iotanum (Wolle)
 * Staurastrum iotanum var. tortum (Teiling)
 * Staurastrum johnsonii (West and West)
 * Staurastrum leptacanthum (Nordst.)
 * Staurastrum longiradiatum (West and West)
 * Staurastrum longispinum ((Bailey) Archer)
 * Staurastrum maamense (Archer)
 * Staurastrum maamense var. maamense (Archer)
 * Staurastrum maamense var. atypicum (Magnotta)
 * Staurastrum lunatum (Ralfs)
 * Staurastrum lunatum var. lunatum (Ralfs)
 * Staurastrum lunatum var. planctonicum (West and West)
 * Staurastrum muricatum (Brebisson)
 * Staurastrum natator (Turpin)
 * Staurastrum natator var. natator (Turpin)
 * Staurastrum natator var. rhomboideum (Carter)
 * Staurastrum natator var. crassum ()
 * Staurastrum neglectum (G. West)
 * Staurastrum picum (West and West)
 * Staurastrum pilosum ((Naegeli) Archer)
 * Staurastrum planctonicum (Teiling)
 * Staurastrum planctonicum var. planctonicum (Teiling)
 * Staurastrum planctonicum var. ornatum ((Groenblad) Teiling)
 * Staurastrum polymorphum (Brebisson)
 * Staurastrum polymorphum var. polymorphum (Brebisson)
 * Staurastrum polymorphum var. munitum (Turpin)
 * Staurastrum polytrichum ((Perty) Rabenhorst)
 * Staurastrum polytrichum var. polytrichum ((Perty) Rabenhorst)
 * Staurastrum polytrichum var. biseriatum (Kaiser)
 * Staurastrum polytrichum var. ornatum (Taft)
 * Staurastrum proboscidium ((Brebisson) Archer)
 * Staurastrum pseudopelagicum (West and West)
 * Staurastrum pseudopelagicum var. pseudopelagicum (West and West)
 * Staurastrum pseudopelagicum var. minor (G. M. Smith)
 * Staurastrum pseudosebaldi (Wille)
 * Staurastrum pseudosebaldi var. pseudosebaldi (Wille)
 * Staurastrum pseudosebaldi var. simplicius (Turpin)
 * Staurastrum pseudotetracerum ((Nordst.) West and West)
 * Staurastrum pungens (Brebisson)
 * Staurastrum pyramidatum (Turpin)
 * Staurastrum pyramidatum var. pyramidatum (Turpin)
 * Staurastrum pyramidatum var. transitorium (Heimerl.)
 * Staurastrum quadrangulare (Brebisson)
 * Staurastrum quadrangulare var. quadrangulare (Brebisson)
 * Staurastrum quadrangulare var. armatum (Turpin)
 * Staurastrum quadrispinatum (Turner)
 * Staurastrum scabrum (Brebisson)
 * Staurastrum sebaldi (Reinsch)
 * Staurastrum sebaldi var. sebaldi (Reinsch)
 * Staurastrum sebaldi var. ornatum (Nordst.)
 * Staurastrum sexcostatum (Brebisson)
 * Staurastrum sexcostatum var. sexcostatum (BrΘb.)
 * Staurastrum sexcostatum var. productum (Turpin)
 * Staurastrum simonyi (Heimerl.)
 * Staurastrum spongiosum (Brebisson)
 * Staurastrum striolatum ((Naegeli) Archer)
 * Staurastrum subgracillimum (West and West)
 * Staurastrum subscabrum (Nordst.)
 * Staurastrum teliferum (Ralfs)
 * Staurastrum vesiculatum (Wolle)
 * Staurastrum ankyroides (Wolle)
 * Staurastrum bullardii (G. M. Smith)
 * Staurastrum freemanii (West and West)
 * Staurastrum inconspicum (Nordstedt)
 * Staurastrum jaculiferum (West)
 * Staurastrum jaculiferum var. jaculiferum (West)
 * Staurastrum jaculiferum var. excavatum (West and West)
 * Staurastrum lacustre (Smith)
 * Staurastrum longibrachiatum ((Borge) Gutwinski)
 * Staurastrum longibrachiatum var. longibrachiatum (West and West)
 * Staurastrum longibrachiatum var. mistassiniense (Irenee-marie)
 * Staurastrum longimum (Turpin)
 * Staurastrum longimum var. longimum (Turpin)
 * Staurastrum longimum var. spiniferum (Scott and Groenblad)
 * Staurastrum longipes ((Nordstedt) Teiling)
 * Staurastrum odonatum (Wolle)
 * Staurastrum pachyrhynchum (Nordstedt)
 * Staurastrum pachyrhynchum var. pachyrhynchum (Nordstedt)
 * Staurastrum pachyrhynchum var. convergens (Raciborski)
 * Staurastrum producta (Grunow)
 * Staurastrum pseudoitanum (Gronblad)
 * Staurastrum rotula (Nordstedt)
 * Staurastrum sexangulare (Lundell)
 * Staurastrum sexangulare var. sexangulare (Lundell)
 * Staurastrum sexangulare var. minima (Nordstedt)
 * Staurastrum subcuciatum (Cooke and Wills)
 * Staurastrum sublaevispinum (West)
 * Staurastrum sublongipes (G. M. Smith)
 * Staurastrum subnudibrachiatum (Turpin)
 * Staurastrum wildemanii (Gutwinski)
 * Staurastrum depressiceps ()
 * Staurastrum depressiceps var. depressiceps ()
 * Staurastrum depressiceps var. planiceps ()
 * Staurastrum punctatum ()
 * Staurastrum punctatum var. punctatum ()
 * Staurastrum punctatum var. pygmaeum ((Brebisson) West and West)
 * Staurastrum retangulare ()
 * Staurastrum retangulare var. retangulare ()
 * Staurastrum retangulare var. quadricornutum (Prescott and Scott)
 * Staurastrum retusum (Turpin)
 * Staurastrum trihedrale (Wolle)
 * Staurastrum pinnatum ()
 * Staurastrum pinnatum var. pinnatum ()
 * Staurastrum pinnatum var. reductum (Krieger)
 * Staurastrum affine (West and West)
 * Staurastrum aristiferum (Ralfs)
 * Staurastrum aristiferum var. aristiferum (Ralfs)
 * Staurastrum aristiferum var. prescottii (Irenee-marie)
 * Staurastrum boldtianum (Groenblad)
 * Staurastrum boreale (West and West)
 * Staurastrum varians (Raciborski)
 * Staurastrum unicorne (Turner)
 * Staurastrum cristatum ((Naegeli) Archer)
 * Staurastrum cristatum var. cristatum ((Naegeli) Archer)
 * Staurastrum cristatum var. japonicum (Hirano)
 * Staurastrum curvatum (West)
 * Staurastrum curvatum var. curvatum (West)
 * Staurastrum curvatum var. brevispinum (Nygaard)
 * Staurastrum curvirostrum (Turner)
 * Staurastrum dakotii (Taft)
 * Staurastrum tumidum (Brebisson)
 * Staurastrum dickiei (Ralfs)
 * Staurastrum dickiei var. dickiei (Ralfs)
 * Staurastrum dickiei var. circulare (Turner)
 * Staurastrum dickiei var. latum (Hirano)
 * Staurastrum dickiei var. maximum (West)
 * Staurastrum dickiei var. rhomboideum (West and West)
 * Staurastrum thunmarkii (Teiling)
 * Staurastrum dybowskii (Woloszynska)
 * Staurastrum erasum (Brebisson)
 * Staurastrum forficulatum (Lundell)
 * Staurastrum forficulatum var. forficulatum (Lundell)
 * Staurastrum forficulatum var. cornutiforme (Wade)
 * Staurastrum forficulatum var. heteracanthum (Groenblad)
 * Staurastrum forficulatum var. subheteroplophorum (Groenblad)
 * Staurastrum galeatum (Turner)
 * Staurastrum gmelliparum (Nordstedt)
 * Staurastrum grande (Bulnheim)
 * Staurastrum grande var. grande (Bulnheim)
 * Staurastrum grande var. parvum (West)
 * Staurastrum groenbladii (Skuja)
 * Staurastrum gurgeliense (Schmidle)
 * Staurastrum hantzschii (Reinsch)
 * Staurastrum heimerlianum (Luetkemueller)
 * Staurastrum irregulare (West)
 * Staurastrum laeve (Ralfs)
 * Staurastrum laeve var. laeve (Ralfs)
 * Staurastrum laeve var. latidivergens (Scott and Groenblad)
 * Staurastrum lapponicum ((Schmidle) Groenblad)
 * Staurastrum lapponicum var. lapponicum ((Schmidle) Groenblad)
 * Staurastrum lapponicum var. depressum (Jackson)
 * Staurastrum pterosporum (Lundell)
 * Staurastrum longiradiata (West)
 * Staurastrum louisianicum (Scott and Groenblad)
 * Staurastrum mamillatum (Nordstedt)
 * Staurastrum messikommeri (Lundberg)
 * Staurastrum messikommeri var. messikommeri (Lundberg)
 * Staurastrum messikommeri var. urnaeforme (Lundberg)
 * Staurastrum micron (West and West)
 * Staurastrum micron var. micron (West and West)
 * Staurastrum micron var. biradiata (Irenee-marie)
 * Staurastrum mucronatum (Ralfs)
 * Staurastrum mucronatum var. mucronatum (Ralfs)
 * Staurastrum mucronatum var. subtriangularis (West and West)
 * Staurastrum omearii (Archer)
 * Staurastrum pingue (Teiling)
 * Staurastrum pingue var. pingue (Teiling)
 * Staurastrum pingue var. tridentata (Nygaard)
 * Staurastrum senarium ((Ehrenberg) Ralfs)
 * Staurastrum polinicum (Raciborske)
 * Staurastrum polinicum var. polinicum (Raciborske)
 * Staurastrum polinicum var. coronulatum (Prescott)
 * Staurastrum pygmaeum (Brebisson)
 * Staurastrum pygmaeum var. pygmaeum (Brebisson)
 * Staurastrum pygmaeum var. major (Wille)
 * Staurastrum peleii (Taft)
 * Staurastrum ornatum (Turner)
 * Staurastrum ornatum var. ornatum (Turner)
 * Staurastrum ornatum var. asperum ((Perty) Schmidle)
 * Staurastrum brevispinum ()
 * Staurastrum brevispinum var. brevispinum ()
 * Staurastrum brevispinum var. canadense (Taft)
 * Staurastrum bicoronatum (Johnson)
 * Staurastrum bicoronatum var. bicoronatum (Johnson)
 * Staurastrum bicoronatum var. tridentatum (Taft)

Tetmemorus 
 Tetmemorus (Ralfs, 1848)
 * Tetmemorus brebissonii ((Menegh.) Ralfs)
 * Tetmemorus brebissonii var. brebissonii ((Menegh.) Ralfs)
 * Tetmemorus brebissonii var. minor (De Bary)
 * Tetmemorus granulatus ((Brebisson) Ralfs)
 * Tetmemorus granulatus var. granulatus ((Brebisson) Ralfs)
 * Tetmemorus granulatus var. attenuatus (Turpin)
 * Tetmemorus laevis ((Kuetzing) Ralfs)
 * Tetmemorus laevis var. laevis ((Keutzing) Ralfs)
 * Tetmemorus laevis var. borgei (Forster)
 * Tetmemorus minutus ()

Triploceras 
 Triploceras (Bailey, 1851)
 Triploceras gracile (Bailey)
 Triploceras gracile var. gracile (Bailey)
 Triploceras gracile var. bidentatum (Nordst.)
 Triploceras verticillatum (Bailey)

Xanthidium 
 Xanthidium (Ehrenberg)
 * Xanthidium antilopaeum ((Brebisson) Kuetzing)
 * Xanthidium antilopaeum var. antilopaeum ((Brebisson) Kuetzing)
 * Xanthidium antilopaeum var. depauperatum ()
 * Xanthidium antilopaeum var. hebridarum (West and West)
 * Xanthidium antilopaeum var. minneapoliense (Wolle)
 * Xanthidium antilopaeum var. polymazum (Nordstedt)
 * Xanthidium antilopaeum var. laeve (Groenblad)
 * Xanthidium antilopaeum var. lemneticum (Nordstedt)
 * Xanthidium antilopaeum var. floridense (Scott and Gronblad)
 * Xanthidium antilopaeum var. crameri (Groenblad)
 * Xanthidium antilopaeum var. planum (Roll.)
 * Xanthidium fasciculatum ((Ehrenberg) Ralfs)
 * Xanthidium fasciculatum var. fasciculatum ((Ehrenberg) Ralfs)
 * Xanthidium fasciculatum var. hexagonum (Wolle)
 * Xanthidium fasciculatum var. oronense (West and West)
 * Xanthidium armatum ((Brebisson) Rabh.)
 * Xanthidium armatum var. armatum ((Brebisson) Rabh.)
 * Xanthidium armatum var. cervicorne (Turpin)
 * Xanthidium armatum var. fissum (Nordstedt)
 * Xanthidium armatum var. mediolaeve (G. M. Smith)
 * Xanthidium cristatum (Brebisson)
 * Xanthidium cristatum var. cristatum (Brebisson)
 * Xanthidium cristatum var. uncinatum (Brebisson)
 * Xanthidium cristatum var. leiodermum ((Roy and Biss.) Turner)
 * Xanthidium cristatum var. hipparguii (Irenee-marie)
 * Xanthidium cristatum var. papilliferum (Irenee-marie)
 * Xanthidium subhastiferum (Turpin)
 * Xanthidium subhastiferum var. subhautiferum (Turpin)
 * Xanthidium subhastiferum var. towerii ((Brebisson) West and West)
 * Xanthidium pensylvanicum ()
 * Xanthidium concinnum (Archer)
 * Xanthidium concinnum var. concinnum (Archer)
 * Xanthidium concinnum var. boldtiana (Turpin)
 * Xanthidium pseudobengalicum (West)
 * Xanthidium brebissonii (Ralfs)
 * Xanthidium controversum (Turpin)
 * Xanthidium perissacanthum (Scott and Prescott)
 * Xanthidium tetracentrotum ()
 * Xanthidium tetracentrotum var. tetracentrotum ()
 * Xanthidium tetracentrotum var. hexagonum (G. M. Smith)
 * Xanthidium hastiferum (Turner)
 * Xanthidium hastiferum var. hastiferum (Turner)
 * Xanthidium hastiferum var. javanicum ((Nordst.) Turner)
 * Xanthidium hastiferum var. johnsonii (West and West)

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