sphenacodontian
English
editNoun
editsphenacodontian (plural sphenacodontians)
- (zoology) Any synapsid of the clade Sphenacodontia.
- 2005, Thomas Stainforth Kemp, The Origin and Evolution of Mammals, page 26:
- The keel of the angular does have the deep form characteristic of the group, but it is not reflected laterally as occurs in other sphenacodontians.