Variations and relationships in the snakes of the genus Pituophis
From its wide range and varied habitat, its conspicuous size and pattern, and its abundance the genus Pituophis is probably one of the best-known genera of North American snakes. The purpose of the present study is to define the taxonomy status of the included forms on a structural and geographic basis, to determine their mutual affinities as far as is possible from the available material, and to assemble the accumulated data concerning them.
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Pituophis deppei deppei Dumeril and Bibron
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Amer amphibians amphibians and reptiles annectens average azygos bellona brown bull snake Burt and Hoyle Calif California Acad caudals CM CM CM Copeia Denburgh and Slevin deppei group dorsal scale dorsal scale formula dorsal spots dorsum females frontal genus Geographic variation ground color herpetology internasals interspaces jani Klauber labials lineaticollis lodingi loreal Lower California males Mexico Modoc County mugitus Museum number of caudals number of dorsal number of scale number of specimens number of spots number of ventrals Pituophis catenifer Pituophis deppei jani Pituophis melanoleucus Pituophis melanoleucus mugitus posterior posteriorly postoculars prefrontals preoculars Proc proportionate tail length range reddish Region reptiles rH rH rostral ruthveni sayi affinis scale characters scale rows scutes side species subspecies subspecies of melanoleucus supralabials Surv total length type locality U. S. Nat Univ variation in number vertebralis Zool