Common Garter Snake - Wikipedia

The subspecific name fitchi is in honor of the American herpetologist Henry Sheldon Fitch.[6]

The subspecific name pickeringii is in honor of the American naturalist Charles E. Pickering.[7]

Subspecies

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Current scientific classification recognizes 12 subspecies (ordered by date):[8]

Image Subspecies Distribution
  T. s. sirtalis (Linnaeus, 1758) – eastern garter snake eastern North America
  T. s. parietalis (Say, 1823) – red-sided garter snake as far north as Fort Smith, Northwest Territories, and as far south as the Oklahoma-Texas border
  T. s. infernalis (Blainville, 1835) – California red-sided garter snake California coast
  T. s. concinnus (Hallowell, 1852) – red-spotted garter snake northwestern Oregon and southwestern Washington

 

T. s. dorsalis (Baird & Girard, 1853) – New Mexico garter snake Mexico and southern New Mexico.
  T. s. pickeringii (Baird & Girard, 1853) – Puget Sound garter snake Northwestern Washington, Vancouver Island and the southwestern British Columbia
  T. s. tetrataenia (Cope, 1875) – San Francisco garter snake (endangered) San Mateo County, California
  T. s. semifasciatus (Cope, 1892) – Chicago garter snake Chicago, Illinois
  T. s. pallidulus Allen, 1899 – maritime garter snake northeastern New England, Quebec, and the Maritime provinces.
  T. s. annectens B.C. Brown, 1950 – Texas garter snake Texas, Oklahoma and Kansas
  T. s. fitchi Fox, 1951 – valley garter snake Rocky Mountains and interior ranges
  T. s. similis Rossman, 1965 – blue-striped garter snake northwestern peninsular Florida

A trinomial authority in parentheses indicates that the subspecies was originally described in a genus other than Thamnophis.

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