different between ichthyosaur vs archosaur

English

From translingual Ichthyosaurus

ichthyosaur (plural ichthyosaurs)

Any of several fishlike marine reptiles of the extinct order Ichthyosauria of the early Triassic to the late Cretaceous period, that had a body somewhat like a porpoise. [from c. 1830]

From New Latin Archosauria (“taxonomic division of extinct reptiles”), from ????? (árkh?n, “leader”) + ????? (saúra, “lizard”)

archosaur (plural archosaurs)

A reptile of the taxon Archosauria, which includes the extinct dinosaurs, plesiosaurs, pterosaurs and ichthyosaurs and modern crocodiles and birds.

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