Mammal-like reptiles in Synapsida (Phylogenetic tree) - Animals in the Fossil sites, and Biodiversity

Classified animal picture guide. Highlighting the link of species shows the images, and clicking the link shows Evolutionary Tree.

• Kingdom Animalia
  • Phylum Chordate
    • Subphylum Vertebra
      • Infraphylum Gnathostomata (Jawed vertebrates)
        • Class Amphibia
          • Superorder Reptiliomorpha (Reptile-like amphibia; 318.1～272.5 Mya)

            Primitive amniota

            Westlothiana   (336～332.9 Mya; Primitive amniotes), Casineria   (339.4～336 Mya; Primitive amniotes), Eogyrinus   (318.1～299 Mya), Diplovertebron   (311.7～306.5 Mya), Diadectes   (290～272.5 Mya; Ancestors of amniotes), Seymouria   (284～272.5 Mya; Many reptilian features)

        • Class Synapsida (Mammal-like reptiles)
          • Order Pelycosauria (318.1～255 Mya)
            • Suborder Eupelycosauria

              Eupelycosaurs

              Archaeothyris   (307.1～305 Mya; Earliest mammal-like reptile), Ophiacodon   (305～272.5 Mya), Ianthasaurus   (305～302 Mya; Large sail on back), Edaphosaurus   (302～272.5 Mya; Large sail on back), Sphenacodon   (299～279.5 Mya), Dimetrodon   (290～272.5 Mya; Large sail on back), Ctenospondylus   (284～279.5 Mya), Secodontosaurus   (279.5～272.5 Mya; Large sail on back), Tetraceratops   (279.5～272.5 Mya)

            • Suborder Caseasauria

              Caseasaur

              Casea   (279.5～272.5 Mya), Cotylorhynchus   (279.5～268 Mya)

          • Order Therapsida (279.5～183 Mya)
            • Suborder Biarmosuchia (Primitive therapsids)

              Primitive therapsids

              Biarmosuchus   (255 Mya), Eotitanosuchus   (255 Mya), Burnetia   (253 Mya)

            • Suborder Dinocephalia (Eutherapsida)

              Dinocephalia

              Estemmenosuchus   (270～265 Mya; Clumsy-looking with horn), Jonkeria   (270 Mya), Deuterosaurus (268～260.5 Mya), Ulemosaurus   (268～260.5 Mya), Anteosaurus   (266～260 Mya), Titanophoneus   (265～260 Mya), Struthiocephalus   (265～260 Mya), Moschops   (255 Mya)

            • Suborder Anomodontia (Neotherapsida)

              Anomodont

              Cistecephalus (260.5～253.8 Mya), Oudenodon   (260.5～253.8 Mya), Oudenodon   (260.5～253.8 Mya), Suminia   (260 Mya), Dicynodon   (258～216.5 Mya; Great Dying③), Diictodon   (258～253.8 Mya), Lystrosaurus   (255～241 Mya; Great Dying③ and the most prosperous Synapsid), Kannemeyeria   (245～228 Mya), Dinodontosaurus   (245～216.5 Mya), Placerias   (228～203.6 Mya)

            • Suborder Gorgonopsia (Theriodont)

              Gorgonopsia

              Inostrancevia   (265～251 Mya), Lycaenops   (258 Mya; Mammal's features to walk), Gorgonops   (255～250 Mya)

            • Suborder Therocephalia (Eutheriodontia)

              Therocephalian

              Lycosuchus   (265～245 Mya; Great Dying③)

            • Suborder Cynodontia (Eutheriodontia)

              Cynodont

              Procynosuchus   (255 Mya), Thrinaxodon   (255～245 Mya; Great Dying③), Cynognathus   (249.7～228 Mya), Probainognathus (245～216.5 Mya), Bienotherium   (199.6～196.5 Mya), Oligokyphus   (196.5～183 Mya)

          • Division Mammaliaformes (Mammal-shaped; 228～189.6 Mya) ⇒ Class Mammalia

            Primitive mammal

            Adelobasileus   (228～216.5 Mya; Earliest mammals), Sinoconodon   (203.6～199.6 Mya), Morganucodon   (203.6～189.6 Mya; Great Dying④), Megazostrodon   (199.6～189.6 Mya; Earliest mammals), Castorocauda   (167.7～150.8 Mya; Jurassic Beaver)

        • Class Sauropsida (Non mammal-like reptiles)
          • Subclass Anapsida (No arch near the temples)
          • Subclass Diapsida (Two arches near the temples)
            • Infraclass Lepidosauromorpha (Lizards, snakes, tuatara)
            • Infraclass Archosauromorpha (Crocodiles, Pterosaurs, Dinosaurs)