Isthmura sierraoccidentalis (Lowe, Jones, and Wright, 1968)

Class: Amphibia > Order: Caudata > Family: Plethodontidae > Subfamily: Hemidactyliinae > Genus: Isthmura > Species: Isthmura sierraoccidentalis

Pseudoeurycea belli sierraoccidentalis Lowe, Jones, and Wright, 1968, Contrib. Sci. Nat. Hist. Mus. Los Angeles Co., 140: 1. Holotype: UAZ 12138, by original designation. Type locality: "ca. 11 mi (rd.) E Santa Ana, on old road to Yécora (ca. 0.5 mi. W. Rancho El Puerto), Sonora, Mexico". The locality is estimated to be 21 ± 1 mi west-southwest of Yécora, by old road to Nuri. [This road, connecting Bermudez, Sonora, with Yecora, Sonora, is now long abandoned and was nearly impassable in 1975 when it was little more than a walking path.—DRF.]

Isthmura sierraoccidentalis — Rovito, Parra-Olea, Recuero, and Wake, 2015, Zool. J. Linn. Soc., 175: 185. 

English Names

Sonoran False Brook Salamander  Liner, 1994, Herpetol. Circ., 23: 13).

Pine-oak Salamander (Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 32).


East-central Sonora and adjacent Madrean Chihuahua, Mexico, 750–3300 m elevation.


In the Pseudoeurycea bellii group of Wake and Lynch, 1976, Sci. Bull. Nat. Hist. Mus. Los Angeles Co., 25: 61. Parra-Olea, García-París, Papenfuss, and Wake, 2005, Herpetologica, 61: 145-158, discussed the systematics of the complex. Raffaëlli, 2007, Les Urodèles du Monde: 219-220, provided brief accounts by subspecies, photographs, and map, and considered it to be in the Pseudoeurycea bellii complex of the Pseudoeurycea bellii group. Van Devender, Lowe, and Holm, 1989, Herpetol. Rev., 20: 75, provided a locality in Madrean Chihuahua. Lemos-Espinal, 2007, Anf. Rept. Chihuahua Mexico: 26-27, provided an account for Chihuahua. Raffaëlli, 2013, Urodeles du Monde, 2nd ed.: 285–286, provided brief account, photographs, and map. See comments regarding Pseudoeurycea bellii sierraoccidentalis by Enderson, Van Devender, and Bezy, 2014, Check List, 10: 919. Bryson, Zarza, Grummer, Parra-Olea, Flores-Villela, Klicka, and McCormack, 2018, Mol. Phylogenet. Evol., 125: 75–84, provided a tree and discussed the phylogenomic diversification of the genus across the Mexican highlands.   

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