Williston: Pelycosimian skull: Erythrosuchus, from above ( ) Artist artist QS:P170,Q1376111 Title Pelycosimian skull: Erythrosuchus, from above Description
sacrum: Varanus, Erythrosuchus, Rutiodon, and Nyctosaurus ( ) Artist artist QS:P170,Q1376111 Title Pelves and sacrum: Varanus, Erythrosuchus, Rutiodon, and