| The New Mexico Shrew was first known as one of many subspecies of the Dusky Shrew (Sorex monticolus). In 1996, using measurements of skulls of the various subspecies, a biologist was able to show that the New Mexico Shrew should be a species on its own. In fact, the research conclusion showed that the New Mexico Shrew was probably more closely related to another shrew not in the S. monticolus group than to those within it.
Because this shrew was once thought to be a subspecies of S. monticolus, it’s measurements would likely be similar to that species.
Alexander, Lois F. 1996. A morphometric analysis of geographic variation within Sorex monticolus (Insectivora: Soricidae). Miscellaneous Publications of the University of Kansas Natural History Museum 88.
Mammal Species of the World (opens in a new window).