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Nikkasaurus
''Nikkasaurus'' is an extinct genus of therapsid.
They were small animals, with skulls about 5 cm long. Their eyes had large orbits and sclerotic rings. The head was tilted back, as with all therapsids.
The skull looks superficially similar to those of the Pelycosaurs, in particular Varanopidae.
''Nikkasaurus'' was probably mainly insectivorous, and possibly nocturnal.
The only known species is ''N. tatarinovi'', described by MF Ivahnenko in 2000, from the Middle Permian Mezen River Basin. The family Nikkasauridae also includes the ''Reiszia'' genus with two species (''R. gubini'' and ''R. tippula'') described by Ivahnenko in 2000 from the same sediment.
''Nikkasaurus'' is possibly a relic of a more ancient stage of therapsid development.
==See also==
* List of synapsids
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Nikkasaurus」の詳細全文を読む
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