Plethodon caddoensis Pope and Pope, 1951, Bull. Chicago Acad. Sci., 9: 148. Holotype: FMNH 61959, by original designation. Type locality: "an altitude of 1200 feet on Polk Creek Mountain of the Caddo Mountains, southwestern Montgomery County, Arkansas", USA.
Plethodon (Plethodon) caddoensis — Vieites, Román, Wake, and Wake, 2011, Mol. Phylogenet. Evol., 59: 632. By implication.
Caddo Mountain Salamander (Schmidt, 1953, Check List N. Am. Amph. Rept., Ed. 6: 37; Conant, Cagle, Goin, Lowe, Neill, Netting, Schmidt, Shaw, Stebbins, and Bogert, 1956, Copeia, 1956: 175; Conant, 1975, Field Guide Rept. Amph. E. Cent. N. Am., Ed. 2: 280; Collins, Huheey, Knight, and Smith, 1978, Herpetol. Circ., 7: 7; Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 32; Collins, 1997, Herpetol. Circ., 25: 8; Crother, Boundy, Campbell, de Queiroz, Frost, Highton, Iverson, Meylan, Reeder, Seidel, Sites, Taggart, Tilley, and Wake, 2001 "2000", Herpetol. Circ., 29: 26; Tilley, Highton, and Wake, 2008, in Crother (ed.), Herpetol. Circ., 37: 20; Collins and Taggart, 2009, Standard Common Curr. Sci. Names N. Am. Amph. Turtles Rept. Crocodil., ed. 6: 13; Tilley, Highton, and Wake, 2012, in Crother (ed.), Herpetol. Circ., 39: 29).
Caddo Mountains of Montgomery and Polk counties, Arkansas, USA, 300-400 m elevation.
In the Plethodon glutinosus group of Highton and Larson, 1979, Syst. Zool., 28: 579-599. Reviewed by Pope, 1964, Cat. Am. Amph. Rept., 14: 1. See statement of geographic range, habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 639. Shepard and Burbrink, 2011, Mol. Phylogenet. Evol., 59: 399-411, reported four genetically (mtDNA) highly distinctive range segments, highly correlated with drainage systems, that may correspond to species or to in-situ haplotypes.
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