Name: Ctenorhachis ‭(‬comb spine‭)‬.
Phonetic: Sten-o-rak-is.
Named By: R.‭ ‬W.‭ ‬Hook‭ & ‬N.‭ ‬Hotton‭ ‬-‭ ‬1991.
Classification: Chordata,‭ ‬Synapsida,‭ ‬Pelycosauria,‭ ‬Sphenacodontidae.
Species: C.‭ ‬jacksoni‭ (‬type‭)‬.
Diet: Carnivore.
Size: Uncertain due to lack of remains.
Known locations: USA,‭ ‬Texas‭ ‬-‭ ‬Wichita Group.
Time period: Early Permian.
Fossil representation: Partial post cranial‭ ‬remains,‭ ‬including vertebrae and pelvis.

       Ctenorhachis is a genus of pelycosaur that lived in North America during the Permian.‭ ‬Although the skull of Ctenorhachis is unknown,‭ ‬the available fossil material for the genus show that Ctenorhachis was a sphenacodontid pelycosaur.‭ ‬So far all members of the Sphenacodontidae were predators in life,‭ ‬so by extension we can conclude that Ctenorhachis would have been a predator as well.

Further reading
-‭ ‬A New Sphenacodontid Pelycosaur‭ (‬Synapsida‭) ‬from the Wichita Group,‭ ‬Lower Permian of North-Central Texas.‭ ‬-‭ ‬Journal of Vertebrate Paleontology‭ ‬11‭(‬1‭)‬:37-44.‭ ‬-‭ ‬R.‭ ‬W.‭ ‬Hook‭ & ‬N.‭ ‬Hotton‭ ‬-‭ ‬1991.


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