Batrachoseps simatus Brame and Murray, 1968, Sci. Bull. Nat. Hist. Mus. Los Angeles Co., 4: 15. Holotype: LACM 34527, by original designation. Type locality: "1 to 1. 5 mi SW of Democrat Hot Springs Resort turnoff, on the steep slopes to the south side of the Kern River Canyon above State Hwy. 178 (24. 7 mi NE of the intersection of Niles and Baker Streets, in Bakersfield, or about 2 mi. NE of Cow Flat Creek), Kern County, California", USA.
Batrachoseps (Batrachoseps) simatus — Jackman, Applebaum, and Wake, 1997, Mol. Biol. Evol., 14: 883-891. Jockusch, Wake, and Yanev, 1998, Contrib. Sci. Nat. Hist. Mus. Los Angeles Co., 472: 1-17; Jockusch and Wake, 2002, Biol. J. Linn. Soc., 76: 363.
Kern Canyon Slender Salamander (Collins, Huheey, Knight, and Smith, 1978, Herpetol. Circ., 7: 5; Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 29; Collins, 1997, Herpetol. Circ., 25: 6; Crother, Boundy, Campbell, de Queiroz, Frost, Highton, Iverson, Meylan, Reeder, Seidel, Sites, Taggart, Tilley, and Wake, 2001 "2000", Herpetol. Circ., 29: 20; Stebbins, 2003, Field Guide W. Rept. Amph., Ed. 3: 184; Tilley, Highton, and Wake, 2008, in Crother (ed.), Herpetol. Circ., 37: 15; Collins and Taggart, 2009, Standard Common Curr. Sci. Names N. Am. Amph. Turtles Rept. Crocodil., ed. 6: 11; Tilley, Highton, and Wake, 2012, in Crother (ed.), Herpetol. Circ., 39: 25).
Kern River drainage in the southern Sierra Nevada of California from Cottonwood Creek (around 330 m elevation), Kern County, to above Fairview to just south of Johnsondale Bridge (ca. 1158 m elevation), Tulare County, California, USA.
In the Batrachoseps (Batrachoseps) nigriventris group of Jockusch, Wake, and Yanev, 1998, Contrib. Sci. Nat. Hist. Mus. Los Angeles Co., 472: 1-17, and Jockusch and Wake, 2002, Biol. J. Linn. Soc., 76: 363. Stebbins, 2003, Field Guide W. Rept. Amph., Ed. 3: 185-186, provided a brief account, figure, and map and noted that populations from Breckenridge Mountain, Cottonwood Creek, and Fairview are differentiated from those in the lower Kern River Canyon and may represent undescribed species. Raffaëlli, 2007, Les Urodèles du Monde: 201-202, provided brief a account, photograph, and map. See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 554, who noted that the population in the vicinity of Fairview, Tulare County, California, probably represents a distinct species.
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