from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biology Any mammal or related animal of the clade Mammaliaformes
  • adjective Characteristic of these animals


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  • A new mammaliaform from the Early Jurassic and evolution of mammalian characteristics.

    Archive 2006-01-01

  • In May 2001 Zhe-Xi Luo and colleagues described Hadrocodium, a new basal mammaliaform from Lower Jurassic China.

    Archive 2006-01-01

  • Yesterday I was asked if Megazostrodon (a basal mammaliaform from Lower Jurassic Lesotho) should be depicted with ‘ear flaps’ (= pinnae).

    Archive 2006-01-01

  • It’s generally agreed that Megazostrodon is right down at the base of Mammaliaformes, and thus, under current convention, outside of the mammaliaform crown-group Mammalia.

    Archive 2006-01-01

  • Of course we don’t really know whether they had fur either (despite dubious suggestions of evidence for such structures in non-mammaliaform synapsids), but it’s reasonable to think that they did given that, phylogenetically, they’re very close to the mammalian common ancestor (and, again, on the basis of parsimony that animal would have been furry), and not all that different from basal mammals.

    Archive 2006-01-01


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