Garter Snakes (Thamnophis)

Lower Classification

Aquatic garter snake (T. atratus)

Santa Cruz garter snake (T. a. atratus)
Oregon garter snake (T. a. hydrophilus)
Diablo Range garter snake (T. a. zaxanthus Boundy)

Bogert’s garter snake (T. bogerti)
Goldenhead garter snake (T. chrysocephalus)
Conant’s garter snake (T. conanti)
Sierra garter snake (T. couchii)
Blackneck garter snake (T. cyrtopsis)

Western blackneck garter snake (T. c. cyrtopsis)
Eastern blackneck garter snake, (T. c. ocellatus)
Tropical blackneck garter snake, (T. c. collaris)

Western terrestrial garter snake (T. elegans)

Arizona garter snake (T. e. arizonae)
Mountain garter snake (T. e. elegans)
San Pedro Mártir garter snake (T. e. hueyi)
Coastal garter snake (T. e. terrestris)
Wandering garter snake (T. e. vagrans)
Upper Basin garter snake (T. e. vascotanneri)

Mexican garter snake (T. eques)

Mexican garter snake (T. e. eques)
Laguna Totolcingo garter snake (T. e. carmenensis)
T. e. cuitzeoensis Conant
T. e. diluvialis Conant
T. e. insperatus Conant
Northern Mexican garter snake (T. e. megalops)
T. e. obscurus Conant
T. e. patzcuaroensis Conant
T. e. scotti Conant
T. e. virgatenuis Conant

Mexican wandering garter snake (T. errans)
Montane garter snake (T. exsul Rossman)
Highland garter snake (T. fulvus)
Giant garter snake (T. gigas)
Godman’s garter snake (T. godmani)
Two-striped garter snake (T. hammondii)
Liner’s garter snake (T. lineri)
Checkered garter snake (T. marcianus)

T. m. marcianus
T. m. praeoculari
T. m. bovalli

Blackbelly garter snake (T. melanogaster)

Gray blackbelly garter snake (T. m. canescens)
Chihuahuan blackbelly garter snake (T. m. chihuahuanensis)
Lined blackbelly garter snake (T. m. linearis)
Mexican blackbelly garter snake (T. m. melanogaster)

Tamaulipan montane garter snake (T. mendax)
Southern Durango spotted garter snake (T. nigronuchalis)
Northwestern garter snake (T. Oregon)
Tepalcatepec Valley garter snake (T. postremus)
Western ribbon snake (Thamnophis proximus)

Chiapas Highlands ribbon snake (T. p. alpinus Rossman)
Arid land ribbon snake (T. p. diabolicus Rossman)
Gulf Coast ribbon snake (T. p. orarius Rossman)
Orangestripe ribbon snake or western ribbon snake (T. p. proximus)
Redstripe ribbon snake (T. p. rubrilineatus Rossman)
Mexican ribbon snake (T. p. rutiloris)

Yellow-throated garter snake (T. pulchrilatus)
Plains garter snake (T. radix)
Rossman’s garter snake (T. rossmani)
Narrow-headed garter snake (T. rufipunctatus)
Ribbon snake (T. sauritus)

Bluestripe ribbon snake (T. s. nitae Rossman)
Southern ribbon snake (T. s. sackenii)
Eastern ribbon snake (T. s. sauritus)
Northern ribbon snake (T. s. septentrionalis)

Longtail alpine garter snake (T. scalaris
Short-tail alpine garter snake (Thamnophis scaliger)
Common garter snake (T. sirtalis)

Texas garter snake (T. s. annectens)
Red-spotted garter snake (T. s. concinnus)
New Mexico garter snake, T. s. dorsalis
valley garter snake (T. s. fitchi)
California red-sided garter snake (T. s. infernalis)
T. s. lowei
Maritime garter snake (T. s. pallidulus)
Red-sided garter snake (T. s. parietalis)
Puget Sound garter snake (T. s. pickeringii)
Blue-striped garter snake (T. s. similis Rossman)
Eastern garter snake (T. s. sirtalis)
Chicago garter snake (T. s. semifasciatus)
San Francisco garter snake (T. s. tetrataenia)

Sumichrast’s garter snake (T. sumichrasti)
Madrean narrow-headed garter snake (T. unilabialis)
West Coast garter snake (T. validus)

Mexican Pacific Lowlands garter snake (T. v. celaeno)
T. v. isabellae
T. v. thamnophisoides
T. v. validus