What is Ellimmichthyiformes?
[[File:Gfp-diplomystus-dentatus.jpg|thumb|''[[Diplomystus]]'' fossil]] '''Ellimmichthyiformes''' is an extinct [[Order (biology)|order]] of prehistoric [[bony fish]] that lived during the [[Lower Cretaceous]] to the [[Oligocene]]. It is related to the order [[Clupeiformes]]. They are also known as '''double-armored herrings'''. This lineage was ultimately demolished by the [[K/T extinction event|Cretaceous–Paleogene extinction event]]. The last genus, ''[[Guiclupea]]'', was a [[freshwater fish]]. It was also the youngest of them all. == Description == The ellimmichthyiforms were small and most [[genera]] did not exceed 10 cm. One of the most famous and well-known [[genera]] was ''[[Diplomystus]]''. Some of the representatives had strange shapes. For example, ''[[Rhombichthys]]'' had a deep body. == Families and genera == * Suborder †'''Armigatoidei''' ** Family †[[Armigatidae]] *** Genus †''[[Armigatus]]'' *** Genus †''[[Diplomystus]]'' *** Genus †''[[Guiclupea]]'' *** Genus †''[[Horseshoeichthys]]'' * Suborder †'''Ellimmichthyoidei''' ** Family †[[Paraclupeidae]] *** Genus †''[[Caboellimma]]'' *** Genus †''[[Codoichthys]]'' *** Genus †''[[Ellimma]]'' *** Genus †''[[Ellimmichthys]]'' *** Genus †''[[Eoellimmichthys]]'' *** Genus †''[[Foreyclupea]]'' *** Genus †''[[Ezkutuberezi]]'' *** Genus †''[[Kwangoclupea]]'' *** Genus †''[[Paraclupea]]'' *** Genus †''[[Ranulfoichthys]]'' *** Genus †''[[Rhombichthys]]'' *** Genus †''[[Scutatoclupea]]'' *** Genus †''[[Scutatuspinosus]]'' *** Genus †''[[Thorectichthys]]'' *** Genus †''[[Tunisiaclupea]]'' *** Genus †''[[Tycheroichthys]]'' * Suborder †'''Sorbinichthyoidei''' ** Family †[[Sorbinichthyidae]] *** Genus †''[[Sorbinichthys]]'' ** Family †[[Gasteroclupeidae]] *** Genus †''[[Gasteroclupea]]'' == Notable genera == === ''Diplomystus'' === [[File:Rhombichthys intocabilis.jpg|left|thumb|''[[Rhombichthys|Rhombichthys intoccabilis]]'']] ''[[Diplomystus]]'' is possibly the most famous [[genus]] of the Ellimmichthyiformes. It was a [[freshwater fish]]. It had seven [[specie