单词	euryapsid
释义	euryapsid /ˌjʊərɪˈapsɪd / noun A Mesozoic marine reptile of a group characterized by a single upper temporal opening in the skull, including the nothosaurs, plesiosaurs, and ichthyosaurs. Sometimes placed in a subclass Euryapsida, though this taxon is no longer widely recognized. Turtles were seen as close relatives of sauropterygians (or even members of Sauropterygia) in the analyses including euryapsids; without euryapsids, those matrices support nondiapsid affinities for turtles.... These forms share the possession of a single upper temporal fenestra (the ‘euryapsid’ condition), and they were frequently classified together as members of Euryapsida. Turtles are outside Diapsida when euryapsids are not included, but diapsids when they are. Origin From Greek eurus 'wide' + apsis, apsid- 'arch'.
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