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Synapsid vs Therapsid - What's the difference?

synapsid | therapsid |

As nouns the difference between synapsid and therapsid

is that synapsid is any animal (including all mammals) of the class synapsida while therapsid is (biology) any extinct reptile of the order (taxlink) ; thought to be direct ancestors of the mammals.

As an adjective synapsid

is 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.

synapsid

English

Adjective

(en adjective)
  • 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.

    • Noun

    (en noun)
  • Any animal (including all mammals) of the class Synapsida.

    • therapsid

    English

    Noun

    (en noun)
  • (biology) Any extinct reptile of the order (taxlink) ; thought to be direct ancestors of the mammals