Pituophis

Pituophis
	San Diego gopher snake; Pituophis catenifer annectens
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Tribe:	Lampropeltini
Genus:	Pituophis; Holbrook, 1842
Synonyms
	Arizona, Churchilla, Coluber, Elaphis, Epiglottophis, Pityophis, Rhinechis, Spilotes[1]

Pituophis is a genus of nonvenomous colubrid snakes commonly referred to as gopher snakes, pine snakes, and bullsnakes, which are endemic to North America.

Geographic range

Species and subspecies within the genus Pituophis are found throughout Mexico, the Southern and Western United States and Western Canada.[2]

Description

All species of Pituophis are large and powerfully built. The head is relatively small in proportion to the body and it is only slightly distinct from the neck. The rostral is enlarged and elongated, imparting a characteristic somewhat pointed shape to the head. All the species occurring in the United States have four prefrontals instead of the usual two.[2]

Modified epiglottis

In all snakes of the genus Pituophis, the epiglottis is peculiarly modified so that it is thin, erect and flexible. When a stream of air is forced from the trachea, the epiglottis vibrates, thereby producing the peculiarly loud, hoarse hissing for which bullsnakes, gopher snakes and pine snakes are well known.[3]

Species and subspecies

Scientific name	Common Name	Subspecies	Distribution
Pituophis catenifer (Blainville, 1835)	gopher snake	P. c. affinis (Hallowell, 1852) – Sonoran gopher snake P. c. annectens Baird & Girard, 1853 – San Diego gopher snake P. c. bimaris Klauber, 1946 – central Baja California gopher snake P. c. catenifer (Blainville, 1835) – Pacific gopher snake P. c. coronalis Klauber, 1946 – Coronado Island gopher snake P. c. deserticola Stejneger, 1893 – Great Basin gopher snake P. c. fulginatus Klauber, 1946 – San Martin Island gopher snake P. c. pumilis Klauber, 1946 – Santa Cruz gopher snake P. c. sayi (Schlegel, 1837) – bullsnake	North America
Pituophis deppei (A.M.C. Duméril, 1853)	Mexican pine snake	P. d. deppei (A.M.C. Duméril, 1853) – southern Mexican pine snake P. d. jani (Cope, 1861) – northern Mexican pine snake	central Oxaca, Mexico
Pituophis insulanus Klauber, 1946	Credos Island gopher snake		Isla de Credos, Mexico
Pituophis lineaticollis (Cope, 1861)	Middle American gopher snake	P. l. gibsoni Stuart, 1954 P. l. lineaticollis (Cope, 1861)	From Mexico city, south to Chiapas, Mexico
Pituophis melanoleucus (Daudin, 1803)	pine snake	P. m. lodingi Blanchard, 1924 – black pine snake P. m. melanoleucus (Daudin, 1803) – northern pine snake P. m. mugitus Barbour, 1921 – Florida pine snake	southeastern United States
Pituophis ruthveni Stull, 1929	Louisiana pine snake		west-central Louisiana and East Texas
Pituophis vertebralis (Blainville, 1835)	Cape gopher snake		southern Baja California Sur, Mexico.

References

Wright AH, Wright AA (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock. 1,105 pp. (in 2 volumes) (Pituophis, pp. 585–626, Figures 171–181, Map 46).
Conant R (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. ISBN 0-395-19977-8 (paperback). (Genus Pituophis, pp. 198–201 + Plate 27 + figure 57 + Map 147).
Schmidt KP, Davis DD (1941). Field Book of Snakes of the United States and Canada. New York: G.P. Putnam's Sons. 365 pp. (Genus Pituophis, pp. 158–160).

External links

Genus Pituophis at The Reptile Database
Accounts of four subspecies, P. deppei deppei, P. deppei jani, P. lineaticollis lineaticollis and P. lineaticollis gibsoni, are given in Duellman WE (1960). "A Taxonomic Study of the Middle American Snake, Pituophis deppei". University of Kansas Publications, Museum of Natural History 10: 599–610.

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[1] Wright AH, Wright AA (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock. 1,105 pp. (in 2 volumes) (Pituophis, pp. 585–626, Figures 171–181, Map 46).

[Conant1975-2] Conant R (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. ISBN 0-395-19977-8 (paperback). (Genus Pituophis, pp. 198–201 + Plate 27 + figure 57 + Map 147).

[3] Schmidt KP, Davis DD (1941). Field Book of Snakes of the United States and Canada. New York: G.P. Putnam's Sons. 365 pp. (Genus Pituophis, pp. 158–160).