(1991). An eryopid (Amphibia: Labyrinthodontia) from the Fort Sill fissures, Lower Permian, Oklahoma. Journal of Vertebrate Paleontology: Vol. 11, No. 1, pp. 130-132.
No takes yet. Share an insight, caveat, or question.
Everett C. Olson (1991) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: