Crotalus mitchellii stephensi

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Crotalus mitchellii stephensi
Crotalus stephensi.JPG
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Viperidae
Subfamily: Crotalinae
Genus: Crotalus
Species: C. mitchellii
Subspecies: C. m. stephensi
Trinomial name
Crotalus mitchellii stephensi
Klauber, 1930
  • Crotalus confluentus stephensi Klauber, 1930
  • Crotalus mitchellii stephensi
    Klauber, 1936
  • Crotalus mitchellii stephensi
    Schmidt, 1953
  • Crotalus mitchellii stephensi
    – McCrystal & McCoid, 1986[1]
  • Crotalus stephensi
    – Douglas et al., 2007
  • Crotalus stephensi
    – Beaman & Hayes, 2008[2]

Crotalus mitchellii stephensi is a venomous pitviper subspecies[3] found in southern Nevada and adjacent California.[4] Common names include panamint rattlesnake, panamint rattler, Owens Valley rattler, and tiger rattlesnake (not to be confused with C. tigris).[5]


The subspecific name, stephensi, is in honor of Frank Stephens, curator emeritus of the San Diego Society of Natural History.[6]


Adults are 58 to 132 cm (23 to 52 in) long, with an average of 60 to 91 cm (24 to 36 in).[7]

According to Klauber (1936), this subspecies is characterized by the absence of the vertical light line on the posterior edge of the prenasal and first supralabial scales. The supraocular scales are pitted, sutured, or with the outer edges broken.[5]

The color pattern consists of a straw, tan, buff, brown, or gray ground color, overlaid with a series of buff, gray, brown, or deep red-brown blotches. Often, gray suffusions occur on the sides of the body and head, and a scattering of black-tipped scales occur on the back, especially at the edges of the blotches.[5]

Geographic range[edit]

This subspecies is found in desert-mountain areas of the eastern slopes of the Sierra Nevada from Mono County, California, east to Nye County, Nevada, south through southwestern Nevada, southeast to Clark County, Nevada, and southwest to central San Bernardino County, California at 900 to 2,400 m (3,000 to 7,900 ft) altitude.[5]


The diet consists of small mammals, lizards, and birds.[7]


These snakes are ovoviviparous and the young are born in July and August. Neonates are about 25 cm in length.[7]

See also[edit]


  1. ^ McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
  2. ^ The Reptile Database.
  3. ^ "Crotalus mitchellii stephensi". Integrated Taxonomic Information System. Retrieved 5 November 2006. 
  4. ^ Behler JL, King FW. 1979. The Audubon Society Field Guide to North American Reptiles and Amphibians. New York: Alfred A. Knopf. 743 pp. LCCCN 79-2217. ISBN 0-394-50824-6.
  5. ^ a b c d Wright AH, Wright AA. 1957. Handbook of Snakes of the United States and Canada. Comstock Publishing Associates. Ithaca and London. (7th printing, 1985). 1105 pp. ISBN 0-8014-0463-0.
  6. ^ Beltz, Ellin. 2006. Scientific and Common Names of the Reptiles and Amphibians of North America – Explained.
  7. ^ a b c Crotalus mitchellii stephensi at Accessed 5 November 2006.

Further reading[edit]

  • Klauber, L.M. 1930. New and renamed subspecies of Crotalus confluentus Say, with remarks on related species. Trans. San Diego Soc. Nat. Hist. 6 (3): 95-144. (Crotalus confluentus stephensi)
  • Klauber, L.M. 1936. Crotalus mitchellii, the speckled rattlesnake. Trans. San Diego Soc. Nat. Hist. 8 (19): 149-184. (Crotalus mitchellii stephensi)

External links[edit]