different between synapsid vs gorgonopsid

English

From translingual Synapsida, from syn- + Ancient Greek ???? (hapsís, “arch”).

synapsid (comparative more synapsid, superlative most synapsid)

Pertaining to the class Synapsida, of animals which have an opening low in the skull roof behind each eye, leaving a bony arch beneath each.
- 1999, Matt Ridley, Genome, Harper Perennial 2000, p. 26:
  We are synapsid tetrapods, a group of reptiles that almost went extinct 200 million years ago in competition with the better-designed dinosaurs.

synapsid (plural synapsids)

gorgonopsid (plural gorgonopsids)

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