Xyrospondylus
| Xyrospondylus | |
|---|---|
| Holotype cervical vertebra at the University of California Museum of Paleontology | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Family: | †Edaphosauridae |
| Genus: | †Xyrospondylus Reisz, Heaton & Pynn, 1982 |
| Type species | |
| †Edaphosaurus ecordi Peabody, 1957 | |
Xyrospondylus is an extinct genus of non-mammalian synapsids belonging to the Edaphosauridae. The type species, X. ecordi, was named in 1982; it was originally named as a species of Edaphosaurus in 1957.
It lived during the Pennsylvanian (Missourian) in Kansas and possibly also Colorado 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.