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 Ask a Biologist Q&A: Synapsid SkinAsk a Biologist Q&A: Synapsid Skin
 Forum thread discussing where the non-mammalian synapsids stand in the transition from reptilian scales to mammalian hair.
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DicynodontiaDicynodontia
 Illustration and information on the characters and anatomy, major subgroups, fossil record and evolution of these herbivores.
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DinocephaliaDinocephalia
 Illustration and information on the characters and anatomy, major subgroups, fossil record and evolution of these carnivorous therapsids.
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Dkimages: SynapsidsDkimages: Synapsids
 Photographs of several cynodont and therapsid fossils including a reconstructed skeleton of Sinokannemeyeria yinchiaaoensis.
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Fossil Groups: DiapsidsFossil Groups: Diapsids
 Provides information on this group of amniotes, their characters and anatomy, major subgroups, fossil record, modern forms, literature and weblinks.
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Fossil Groups: SynapsidaFossil Groups: Synapsida
 Provides information on the characteristics and anatomy of synapsids with a diagram of a typical early period skull showing the synapsid arch and undifferentiated teeth.
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Introduction to the SynapsidaIntroduction to the Synapsida
 Information on this great vertebrate group with a 300 million year history, their fossil record, life history, ecology, systematics and morphology.
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Mammal-like ReptilesMammal-like Reptiles
 The Natural History Museum supplies illustrations of Anteosaurus, Cynognathus, Dicynodon, Dimetrodon, Lystrosaurus, Moschops, Oligokyphus and Thrinaxodon, with brief facts about each.
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SynapsidSynapsid
 Information from Wikipedia on this group of reptiles, their changing classification, characteristics and evolutionary history.
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Synapsid CladogramSynapsid Cladogram
 Provides a cladogram of the Synapsida showing the relationships of the different taxa.
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Synapsida: Mammals and Their Extinct RelativesSynapsida: Mammals and Their Extinct Relatives
 Information from the Tree of Life Web Project on the synapsids which include mammals and all extinct amniotes more closely related to mammals than to reptiles.
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