Ambystoma ordinaria Taylor, 1940 "1939", Univ. Kansas Sci. Bull., 26: 422. Holotype: EHT-HMS 16367, by original designation; now FMNH 100055 according to Marx, 1976, Fieldiana, Zool., 69: 36. Type locality: "small stream at an elevation of about 9,000 feet, four miles west of El Mirador, near Puerto Hondo, Michoacán, Mexico".
Ambystoma ordinarium — Smith and Taylor, 1948, Bull. U.S. Natl. Mus., 194: 13.
Ambystoma (Ambystoma) ordinarium — Tihen, 1958, Bull. Florida State Mus., Biol. Sci., 3: 3, 35.
Michoacan Stream Salamander (Ananjeva, Borkin, Darevsky, and Orlov, 1988, Dict. Amph. Rept. Five Languages: 19; Liner, 1994, Herpetol. Circ., 23: 9).
Michoacan Stream Siredon (Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 27).
Puerto Hondo Stream Salamander (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 27).
Plateau region of Michoacán east of Lake Patzcurao and east to the Municipality of Tianguistenco, state of México, Mexico, ca. 2200 m elevation.
Reviewed by Anderson, 1975, Cat. Am. Amph. Rept., 164: 1-2. Highton, 2000, in Bruce et al., Biol. Plethodontid Salamanders: 221, on the basis of the mtDNA data of Shaffer and McKnight, 1996, Evolution, 50, suggested that Ambystoma ordinarium might be two species, and that one of these might be conspecific with Ambystoma dumerilii. Matias-Ferrer and Murillo, 2004, Herpetol. Rev., 35: 182-183, provided the record from the state of México, Mexico. Weisrock, Shaffer, Storz, Storz, and Voss, 2006, Mol. Ecol., 15: 2489-2503, discussed the effects of introgression with Ambystoma dumerilii and that evidence from nuDNA suggests that Ambystoma ordinarium consists of one species with populations that have at various time introgressed other species' mtDNA and that Ambystoma dumerilii is otherwise only distantly related. Raffaëlli, 2007, Les Urodèles du Monde: 88, provided a brief account, figure, and map. See map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 546.
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