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diapsid
[ dahy-ap-sid ]
adjective
- (of reptiles) having two openings in the skull behind each eye, characteristic of the subclasses Lepidosauria and Archosauria, including all living reptiles except turtles.
noun
- a diapsid reptile.
diapsid
/ dī-ăp′sĭd /
- Any of various amniotes having a skull with two pairs of temporal openings. Diapsids evolved in the Permian Period and grew longer and better-developed hindlimbs than forelimbs (unlike therapsids). Diapsids evolved into the archosaurs (including the dinosaurs and their descendants the birds) and all modern reptiles except, in some classifications, the turtles.
- Compare anapsid
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Example Sentences
Their remains fall into two great groups, which are known as the Diapsid and the Synapsid reptiles.
From Project Gutenberg
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