protomammal

Definitions of protomammal
  1. noun
    probably warm-blooded; considered direct ancestor of mammals
    synonyms: therapsid
    see moresee less
    types:
    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:
    synapsid, synapsid reptile
    extinct reptile having a single pair of lateral temporal openings in the skull
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