• 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 Sphenacodontia
    Sphenacodon Ctenospondylus Dimetrodon...
    7 KB (455 words) - 21:14, 8 August 2024
  • Thumbnail for Eupelycosauria
    Sphenacodon Ctenospondylus...
    10 KB (775 words) - 22:18, 5 September 2024
  • Thumbnail for Dimetrodon
    Sphenacodon Ctenospondylus...
    83 KB (9,194 words) - 04:52, 20 September 2024
  • Thumbnail for Therapsida
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    30 KB (2,927 words) - 02:53, 28 September 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 Edaphosaurus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    36 KB (4,254 words) - 04:44, 7 September 2024
  • Thumbnail for Ophiacodon
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    9 KB (892 words) - 15:44, 28 April 2024
  • Thumbnail for Sphenacodontoidea
    Sphenacodon Ctenospondylus...
    7 KB (397 words) - 23:10, 10 December 2023
  • Thumbnail for Theriodontia
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    6 KB (526 words) - 08:26, 29 August 2024
  • †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    15 KB (1,513 words) - 02:09, 21 September 2024
  • Thumbnail for Palaeohatteria
    Sphenacodon Ctenospondylus Dimetrodon...
    8 KB (629 words) - 15:21, 6 April 2024
  • Thumbnail for Palaeohatteriidae
    Sphenacodon Ctenospondylus Dimetrodon...
    4 KB (210 words) - 15:22, 6 April 2024
  • Thumbnail for Eutheriodontia
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    4 KB (450 words) - 12:48, 16 November 2023
  • Thumbnail for Ianthodon
    Sphenacodon spp. Ctenospondylus spp. Dimetrodon spp....
    6 KB (527 words) - 21:58, 25 August 2024
  • Thumbnail for Eunotosaurus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    24 KB (2,429 words) - 04:19, 29 July 2024
  • Thumbnail for Edaphosauridae
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    6 KB (305 words) - 21:09, 12 August 2023
  • Thumbnail for Alierasaurus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    29 KB (2,508 words) - 20:52, 5 January 2024
  • Thumbnail for Archaeothyris
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    6 KB (509 words) - 20:01, 22 July 2024
  • Thumbnail for Varanops
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    6 KB (587 words) - 22:54, 4 February 2024
  • Thumbnail for Remigiomontanus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    1 KB (61 words) - 20:56, 3 July 2024
  • Thumbnail for Asaphestera
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    5 KB (438 words) - 15:47, 9 June 2024
  • Thumbnail for Cotylorhynchus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    78 KB (8,362 words) - 04:42, 7 September 2024
  • Thumbnail for Stereorhachis
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    1 KB (53 words) - 15:45, 28 April 2024
  • Thumbnail for Melanedaphodon
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    2 KB (113 words) - 20:07, 14 November 2023
  • †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    976 bytes (45 words) - 19:51, 21 November 2021
  • Thumbnail for Lupeosaurus
    †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    2 KB (88 words) - 21:26, 17 January 2023
  • †Shashajaia †Sphenacodontidae Cryptovenator Ctenorhachis Ctenospondylus Cutleria? Dimetrodon Eosyodon Macromerion Neosaurus Secodontosaurus Sphenacodon...
    3 KB (270 words) - 09:29, 9 June 2024