• Thumbnail for Ctenospondylus
    Ctenospondylus ("comb vertebra") is an extinct genus of sphenacodontid synapsid Species were about three meters (ten feet) long. The genus is known only...
    6 KB (672 words) - 04:37, 30 July 2024
  • Thumbnail for Sphenacodontidae
    attribute). Several large (~3 meters) and advanced members of this group (Ctenospondylus, Sphenacodon, Secodontosaurus and Dimetrodon) are distinguished by a...
    8 KB (694 words) - 21:49, 4 January 2024
  • Thumbnail for Secodontosaurus
    and Ctenospondylus have a lower dorsal crest formed from flat, blade-like neural spines, relatively low in Sphenacodon and taller in Ctenospondylus. However...
    16 KB (1,706 words) - 08:39, 26 June 2024
  • Thumbnail for Dimetrodon
    Sphenacodon Ctenospondylus...
    83 KB (9,217 words) - 18:08, 1 October 2024
  • Thumbnail for Sphenacodontia
    Sphenacodon Ctenospondylus Dimetrodon...
    7 KB (455 words) - 21:14, 8 August 2024
  • Thumbnail for Eupelycosauria
    Sphenacodon Ctenospondylus...
    10 KB (775 words) - 08:41, 6 October 2024
  • Thumbnail for Sphenacodon
    and form a crest rather than a tall sail. (The sphenacodontid genus Ctenospondylus also has blade-like neural spines, but its dorsal crest is taller than...
    17 KB (1,871 words) - 04:56, 16 June 2024
  • Thumbnail for Therapsida
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    30 KB (2,935 words) - 04:26, 17 October 2024
  • Thumbnail for Edaphosaurus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    36 KB (4,263 words) - 07:55, 13 October 2024
  • Thumbnail for Edaphosauridae
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    6 KB (308 words) - 09:02, 6 October 2024