Notiosorex cockrumi Baker, O'Neill, and McAliley 2003 Notiosorex cockrumi Baker, O'Neill, and McAliley 2003, Occas. Pap. Mus. Texas Tech Univ., 222: 2. Type Locality: USA, Arizona, Cochise Co., Leslie Canyon National Wildlife Refuge, T 21S, R 28E Section NW 1/4 20, 4460 ft. (1359 m). Vernacular Names: Cockrum's Gray Shrew. Distribution: Arizona (USA) to C Sonora (Mexico). Discussion: A cryptic species indentified on the basis of cytochrome b gene fragments. Carraway and Timm (2000) included this new taxon in crawfordi and stated that they "found no identifyable morphological differences." Sympatric with crawfordi in SE Arizona. A karyotype of 2n = 62, FN = 94 reported earlier from Pima County, Arizona (Baker and Hsu, 1970), may refer to this species, while 2n= 68 and FN = 102 may refer to crawfordi. Molecular data also indicate that a third species occurs in Baja California (Baker et al., 2003 a).

Published as part of Wilson, Don E. & Reeder, DeeAnn, 2005, Order Soricomorpha, pp. 220-311 in Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1, Baltimore :The Johns Hopkins University Press on page 281, DOI: 10.5281/zenodo.7316519