found: ITIS, May 13, 2004(Pituophis catenifer (Blainville, 1835) -- bullsnake, gopher snake. Synonym: Coluber catenifer)
found: NatureServe explorer, May 13, 2004(Pituophis catenifer, Gopher Snake. Pituophis catenifer formerly was included in P. melanoleucus. In recent years many authors have regarded the gopher snakes and bullsnake as a species (P. catenifer) distinct from the pine snake (P. melanoleucus) and Louisiana pine snake (P. ruthveni). This classification, though not unequivocally supported by available data, has been adopted in this database.)
found: Online field guides from eNature.com, May 13, 2004(Gopher Snake, Pituophis catenifer)
found: Standard common and current scientific names for North American amphibians, turtles, reptiles & crocodilians, via WWW, May 13, 2004(Gopher Snake, Pituophis catenifer (Blainville, 1835))
found: Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding, via WWW, May 13, 2004(Pituophis catenifer (Blainville, 1835)--Gophersnake)