Oryzomys nelsoni

Oryzomys nelsoni
Skull with the number 89200 written on it.
Skull of Oryzomys nelsoni, seen from above.[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Subfamily: Sigmodontinae
Genus: Oryzomys
Species:
O. nelsoni
Binomial name
Oryzomys nelsoni
Merriam, 1898
Map of western Mexico with a green mark on the southern tip of the Baja California peninsula, an orange mark off the coast of Nayarit, a pink area inland in the southwest, and a red area along the Pacific coast north to Sonora.
Distribution of Oryzomys nelsoni (orange) and other western Mexican Oryzomys.
Synonyms[5]
  • Oryzomys nelsoni Merriam, 1898[3]
  • [Oryzomys palustris] nelsoni: Hershkovitz, 1971[4]

Oryzomys nelsoni, also known as the Nelson’s Rice Rat, is an extinct rodent of María Madre Island, Nayarit, Mexico. Within the genus Oryzomys of the family Cricetidae, it may have been most closely related to the mainland species O. albiventer. Since its first description in 1898, most authors have regarded it as a distinct species, but it has also been classified as a mere subspecies of the marsh rice rat (O. palustris).

After its discovery in 1897, it has never been recorded again and it is now considered extinct; the presence of introduced black rats on María Madre may have contributed to its extinction. Oryzomys nelsoni was a large species, distinguished in particular by its long tail, robust skull, and large incisors. It was reddish to yellowish above and mostly white below. Its diet may have included plant material and small animals.

  1. ^ Goldman, 1918, plate II, fig. 1
  2. ^ Timm, R., Álvarez-Castañeda, S.T. & Lacher, T. 2017. Oryzomys nelsoni. The IUCN Red List of Threatened Species 2017: e.T15583A22388135. https://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T15583A22388135.en. Downloaded on 11 March 2021.
  3. ^ Merriam, 1898, p. 15
  4. ^ Hershkovitz, 1971, p. 704
  5. ^ Carleton and Arroyo-Cabrales, 2009, p. 122