Notiosorex Cockrumi (2004)
In 2004, a new species of Desert Shrew was identified in Arizona, and named Notiosorex cockrumi. The tiny shrew, which is as light as a penny, is the first new mammal species to be found in Arizona since 1977. It is one of at least four species of the genus Notiosorex.
Read more about this topic: Shrews And Moles Discovered In The 2000s