出典:Wikipedia
出典:『Wikipedia』 (2011/05/07 18:17 UTC 版)
Sphenacodon was a pelycosaur that was about 3 metres (9.8 ft) in length. Sphenacodon belongs to the family Sphenacodontidae, a lineage that was related to the therapsids. It lived in the Early Permian in present day Texas and New Mexico.