†family Petrolacosauridae Peabody 1952 (diapsid)
Reptilia - Araeoscelidia - Petrolacosauridae
Full reference: F. E. Peabody. 1952. Petrolacosaurus kansensis Lane, a Pennsylvanian Reptile from Kansas. The University of Kansas Paleontological Contributions, Series Vertebrata 1:1-41
Parent taxon: Araeoscelidia according to M. Laurin 1991
See also Benton 1985, Carroll 1988, Chatterjee 1980, Kuhn 1966, Peabody 1952 and Reisz 1977
Sister taxa: Araeoscelidae, Halgaitosaurus, Spinoaequalis
Subtaxa: Petrolacosaurus
Type: Petrolacosaurus
Ecology:
Distribution: found only at Garnett Quarry (Carboniferous of Kansas)