Leslie N. Carraway
Monographs of the Western North American Naturalist 3 (1), 1-91, (1 January 2007) https://doi.org/10.3398/1545-0228-3.1.1
KEYWORDS: shrews, Soricidae, Mexico, Eulypotyphla, Cryptotis, Notiosorex, Megasorex, Sorex, musarañas, México
Examination of published records, and morphometric and morphologic analyses of 3398 museum specimens, revealed that 4 genera including 30 monotypic and 5 polytypic species of shrews (Soricidae) occur in Mexico. Of these, 2 new species were named and 2 subspecies were heretofore unrecognized, 3 were reclassified, and 1 was elevated to species level. Cryptotis goldmani machetes, previously subsumed into C. g. goldmani, was reelevated based on ventral pelage color. Sorex veraepacis mutabilis contained 2 morphotypes, 1 of which matched that of the holotype; however, the 2nd morphotype not only did not match that of the subspecific holotype, but also has a sympatric distribution. Thus, specimens of the 2nd morphotype are referred to a new species: Sorex ixtlanensis. Sorex saussurei formerly contained 4 subspecies of which the nominal S. s. saussurei contained 3 morphotypes based on position of the median tines of the I1s. Specimens of 1 morphotype match the holotype, have a distribution limited to the Transvolcanic Belt, and are referred to the now monotypic S. saussurei. Specimens of the 2nd morphotype, herein referred to a new species Sorex mediopua, also are limited to the Transvolcanic Belt and can be found at many of the same localities as those of S. saussurei. Specimens of the 3rd morphotype, not only include a portion of the specimens formerly included in S. s. saussurei, but all those previously referred to the other 3 subspecies of S. saussurei: cristobalensis, oaxacae, and veraecrucis. Based on priority, veraecrucis is elevated to specific status with cristobalensis and oaxacae as subspecies. The specimens formerly contained within S. s. saussurei are referred to a new subspecies: Sorex veraecrucis altoensis. Sorex veraecrucis now has the broadest distribution of any taxon of shrews in Mexico.