What are Oryzomys?

Oryzomys

Oryzomys is a genus of semiaquatic rodents in the tribe Oryzomyini living in southern North America and far northern South America. It includes eight species, two of which—the marsh rice rat (O. palustris) of the United States and O. couesi of Mexico and Central America—are widespread; the six others have more restricted distributions. The species have had eventful taxonomic histories, and most species were at one time included in the marsh rice rat; additional species may be recognized in the future. The name Oryzomys was established in 1857 by Spencer Fullerton Baird for the marsh rice rat and was soon applied to over a hundred species of American rodents. Subsequently, the genus gradually became more narrowly defined until its current contents were established in 2006, when ten new genera were established for species previously placed in Oryzomys.

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Some articles on Oryzomys:

Eremoryzomys
... Eremoryzomys polius, also known as the Gray Rice Rat or the Marañon Oryzomys, is a rodent in the tribe Oryzomyini of the family Cricetidae ... Osgood, it was originally placed in Oryzomys and named Oryzomys polius ... analysis found that it was not closely related to Oryzomys in the strict sense or to any other oryzomyine then known, so that it is now placed in its own genus, Eremoryzomys ...
Marsh Rice Rat
... The marsh rice rat (Oryzomys palustris) is a semiaquatic North American rodent in the family Cricetidae ... is sometimes classified as a different species, the silver rice rat (Oryzomys argentatus) ... west, which suggests that the western populations may be recognized as a separate species, Oryzomys texensis ...
Oryzomys - Human Interactions
... Two species of Oryzomys, O ... antillarum and O ...
Cerradomys
... The species in this genus have historically been placed in Oryzomys, but according to cladistic research, they are not more closely related to the type species of Oryzomys ... Sooretamys angouya, also formerly in Oryzomys, is another relative it has been placed in the same group as the species of Cerradomys in the past ... were placed in a single species, then called Oryzomys subflavus, but since then, seven new species have been described, often on the basis of karyotypic differences, but two of these later ...
Euryoryzomys Emmonsae - Taxonomy
... reviewed the taxonomy of species previously lumped under "Oryzomys capito" (now classified in the genera Hylaeamys, Euryoryzomys, and Transandinomys) ... They described the new species Oryzomys emmonsae on the basis of 17 specimens from three locations in the state of Pará in northern Brazil these animals had been previously identified as Oryzomys macconnelli (no ... The new species was placed in what they termed the "Oryzomys nitidus group", which also included O ...