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Mexico. Sinaloa. Municipality of Badiraguato: 1.7 km north of the Santa Gertrudis town (25.6902° N, -107.0237° W; WGS 84, 2,407 m a.s.l.), August 15, 2020. The photograph of the individual of Crotalus pricei was verified by Iván Trinidad Ahumada Carrillo and was deposited at the Museo de Zoología "Alfonso L. Herrera", Universidad Nacional Autónoma de México (photo voucher: MZFC 59-60; Fig. 1A and B). The individual was found at approximately 15:30 h, between the cracks of a rock (Fig. 1B) on a path surrounded by pine-oak forest (Fig. 1C). We presume the individual (ca. total length 200-250 mm) to be a juvenile (Campbell & Lamar, 2004; maximum total length 660 mm), of undetermined sex.
Photographs by Gamez-Duarte Edgar A. / Fotografías tomadas por Gamez-Duarte Edgar A.
Figure 1 (A and B) First record of Crotalus pricei in Sinaloa, Mexico (MZFC 59-60) and (C) habitat where the individual was found. / Figura 1. (A y B) Primer registro de Crotalus pricei en Sinaloa, México (MZFC 59-60) y (C) hábitat donde se encontró al individuo.
Crotalus pricei Van Denburgh, 1895 is a small rattlesnake and its distribution ranges from southern Arizona in the United States through the Sierra Madre Occidental in the Mexican states of Sonora, Chihuahua, Durango (Campbell & Lamar, 2004), Zacatecas (Lara-Galván et al., 2020), Nayarit (Woolrich-Piña et al., 2016), and Jalisco (Cruz-Sáenz et al., 2017); the Trans-Mexican Volcanic Belt in Aguascalientes (Vázquez-Díaz & Quintero-Díaz, 2005); and the Sierra Madre Oriental (Coahuila, Nuevo León, Tamaulipas) as the southern limit in San Luis Potosí (Lemos-Espinal et al., 2018; Prival & Schroff, 2012). Crotalus pricei is most frequently encountered between 1800 and 3200 m and reaches its maximal population densities at higher elevations (Prival & Schroff, 2012). It is found in rocky habitats in woodlands, extensive limestone outcroppings, open grassy meadows, scrub oaks, and pine-oak forests (Campbell & Lamar, 2004). Two isolated subspecies are recognized, one in the Sierra Madre Oriental (C. p. miquihuanus) and the other in the Sierra Madre Occidental (C. p. pricei) (Campbell & Lamar, 2004; Lemos-Espinal et al., 2015).
Here we document the first verified record of C. pricei in Sinaloa (Fig. 2). This new record increases the species of reptiles present in Sinaloa to a total of 122 (Lara-Reséndiz & Jacobo-González, 2022; Lemos-Espinal & Smith, 2020). The nearest previous records are in Guadalupe y Calvo, Chihuahua (45 km NNE; Lemos-Espinal et al., 2015) and Los Frailes, Tamazula, Durango (12 km SE; GBIF, 2022). Finally, this new state record indicates that more studies and citizen science projects are needed and for a detailed analysis of the distribution of Sinaloa's herpetofauna (Castro-Bastidas & Serrano-Serrano, 2022; Lara-Reséndiz & Jacobo-González, 2022; Lemos-Espinal & Smith, 2020; Loc-Barragán et al., 2020).
