synapsid

Synonyms:

synapsid reptile

Types:

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protomammal, therapsid

probably warm-blooded; considered direct ancestor of mammals

ictodosaur

intermediate in form between the therapsids and most primitive true mammals

pelycosaur

large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America

edaphosaurus

heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic

dimetrodon

carnivorous dinosaur of the Permian in North America having a crest or dorsal sail

Chronoperates paradoxus

shrew-sized protomammal from the Alberta region of Canada; from about 55 million years ago (much more recent than other mammal-like reptiles)

cynodont

small carnivorous reptiles

dicynodont

a kind of therapsid

Type of:

reptile, reptilian

any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms