Notiosoricini, whose members are known as the North American gray shrews, is a tribe of shrews in the family Soricidae, including the genera ''

Megasorex The Mexican shrew (''Megasorex gigas'') is a species of mammal from the subfamily Soricinae in the family Soricidae. It is monotypic within the genus ''Megasorex'' and is endemic to Mexico Mexico ( Spanish: México), officially the Unite ...

'' and ''

Notiosorex ''Notiosorex'' is a genus of shrew from the subfamily Soricinae. History ''Notiosorex'' shrews have a fossil history that extends to the Miocene (i.e., mid-Hemphillian). The geographic distribution of the genus has always been in the southwester ...

''. They are found across the

southwestern United States The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, N ...

and most of

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...

. The tribe includes the following species: * Genus ''

'' ** Mexican shrew, ''M. gigas'' * Genus ''

'' **

Cockrum's gray shrew ''Notiosorex cockrumi'', also called Cockrum's gray shrew or Cockrum's desert shrew, is a tiny species of shrews named in 2003. This red-toothed shrew, which is as light as a penny, is the first new mammal species from Arizona since 1977. Its r ...

, ''N. cockrumi'' **

Crawford's gray shrew Crawford's gray shrew (''Notiosorex crawfordi''), also known as the desert shrew, is a small shrew found in the southwestern United States and northern Mexico. It is a member of the family Soricidae of the order Eulipotyphla. It was the onl ...

, ''N. crawfordi'' **

Large-eared gray shrew The large-eared gray shrew (''Notiosorex evotis'') is a species of shrew Shrews (family Soricidae) are small mole-like mammals classified in the order Eulipotyphla. True shrews are not to be confused with treeshrews, otter shrews, eleph ...

, ''N. evotis'' **

Villa's gray shrew Villa's gray shrew (''Notiosorex villai'') is a shrew native to northeastern Mexico, where it is called ''musaraña''. It is assessed vulnerable by the IUCN due to its small extent of occurrence and degradation of habitat. Taxonomy The shrew ...

, ''N. villai''

References

* https://animaldiversity.org/accounts/Notiosoricini/classification/ * http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=13700443 * https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=709679#null
Red-toothed shrews Mammals of North America Mammal tribes {{redtoothed-shrew-stub