Xyrospondylus

Xyrospondylus is an extinct genus of non-mammalian synapsids belonging to the Edaphosauridae.^[1][2] The type species, X. ecordi,^[3] was named in 1982;^[4] it was originally named as a species of Edaphosaurus in 1957.^[5]

Xyrospondylus Temporal range: Late Carboniferous, Pennsylvanian (Missourian) ~302 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Holotype cervical vertebra at the University of California Museum of Paleontology
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Family:	†Edaphosauridae
Genus:	†Xyrospondylus Reisz, Heaton & Pynn, 1982
Type species
†Edaphosaurus ecordi Peabody, 1957

It lived during the Pennsylvanian (Missourian) in Kansas and possibly also Colorado^[6] and the holotype is known from a single cervical vertebra found in the Stanton Formation. A second specimen, consisting of a fragmentary pelvis, is also known. A third specimen, known from Colorado, is known, but it probably does not pertain to Xyrospondylus.

See also

• List of pelycosaurs
• List of therapsids