Gnathostomulida
Los Gnathostomulida son un embrancament de vèrms marins intersticials. Un centenat d'espècias es conuegut.
Son incluses dins lo superembrancament dels Gnathifera.

Classificacion

Classa Bursovaginoidea Sterrer, 1972
Òdre Conophoralia Sterrer, 1972
Familha Austrognathiidae Sterrer, 1972
Austrognatharia Sterrer, 1971
Austrognathia Sterrer, 1965
Triplignathia Sterrer, 1991
 Òdre Scleroperalia Sterrer, 1972
Familha Agnathiellidae Sterrer, 1972
Agnathiella Sterrer, 1971
Paragnathiella Sterrer, 1997
Familha Clausognathiidae Sterrer, 1972
Clausognathia Sterrer, 1992
Familha Gnathostomariidae Sterrer, 1972
Gnathostomaria Ax, 1956
Familha Gnathostomulidae Sterrer, 1972
Chirognathia Sterrer & Sørensen 2006
Corculognathia Ehlers & Ehlers, 1973
Gnathostomula Ax, 1956
Ratugnathia Sterrer, 1991
Semaeognathia Riedl 1970
Familha Mesognathariidae Sterrer, 1972
Labidognathia Riedl 1970
Mesognatharia Sterrer, 1966
Tenuignathia Sterrer, 1976
Familha Onychognathiidae Sterrer, 1972
Goannagnathia Sterrer, 2001
Nanognathia Sterrer, 1972
Onychognathia Riedl, 1971
Valvognathia Kristensen & Norrevang, 1978
Vampyrognathia Sterrer, 1998
Familha Paucidentulidae Sterrer, 1972
Paucidentula Sterrer, 1998
Familha Problognathiidae Sterrer & Farris, 1975
Problognathia Sterrer & Farris, 1975
Familha Rastrognathiidae Kristensen & Norrevang, 1977
Rastrognathia Kristensen & Norrevang, 1977
 Classa Filospermoidea Sterrer, 1972
Òdre Filospermoida Sterrer, 1972
Familha Haplognathiidae Sterrer, 1972
Haplognathia Sterrer, 1970
Familha Pterognathiidae Sterrer, 1972
Cosmognathia Sterrer, 1991
Pterognathia Sterrer, 1966

Filogenia

Ligams extèrnes
 ITIS Gnathostomulida  Sterrer, 1972

Referéncias
 Ax : Die Gnathostomulida, eine rätselhafte Wurmgruppe aus dem Meeressand. Abhandlungen der Akademie der Wissenschaften und Literatur Mainz, mathematisch-naturwissenschaftliche Klasse, 8:l-32, 1956
 Ax : The position of the Gnathostomulida and Platyhelminthes in the phylogenetic system of the Bilateria. In: S. Conway Morris, J. D. George, R. Gibson & H. M. Platt : The Origins and Relationships of Lower Invertebrates, 168-180, Oxford, Clarendon Press, 1986
 Riedl : Gnathostomulida from America. Science 163:445-442, 1969
 Sterrer : Gnathostomulida: Problems and procedures. Smithsonian Contributions to Zoology, 76:9-15, 1971
 Sterrer : Systematics and evolution within the Gnathostomulida. Systematic Zoology, 21(2):151-173, 1972

Gnathostomulida