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Animal Weight

How much does a Nephelomys keaysi weight?

It is hard to guess what a Nephelomys keaysi weights. But we have the answer:

An adult Nephelomys keaysi (Oryzomys keaysi) on average weights 58 grams (0.13 lbs).

The Nephelomys keaysi is from the family Muridae (genus: Oryzomys). When reaching adult age, they grow up to 11.2 cm (0′ 5″).

As a reference: An average human weights in at 62 kg (137 lbs) and reaches an average size of 1.65m (5′ 5″). Humans spend 280 days (40 weeks) in the womb of their mother and reach around 75 years of age.

Nephelomys keaysi, also known as Keays’s oryzomys or Keays’s rice rat, is a species of rodent in the genus Nephelomys of family Cricetidae. It is found from southeastern Peru to northern Bolivia on the eastern slope of the Andes in Yungas humid forest at altitudes of 1000 to 2600 m. Although its continued existence is not in serious danger and it is listed as “least concern”, destruction of its habitat may pose a threat to some populations.In 1900, Joel Asaph Allen described two rodents from Juliaca, Peru, at an altitude of 6,000 feet (1,800 m) on the basis of specimens collected in 1899 and 1900 by H. H. Keays. One he named, after Keays, Oryzomys keaysi, and the other Oryzomys obtusirostris. He considered the former to have no close relatives and the latter to be close to O. longicaudatus. Oldfield Thomas, in reporting on some specimens from Peru, concurred with the latter allocation, but considered O. keaysi to be part of the group around O. albigularis, and suggested that these should perhaps all be placed in the same species. After re-examining his specimens of O. obtusirostris, Allen reclassified the animal to the genus Zygodontomys in 1913, as Zygodontomys obtusirostris, but admitted that it was atypical for its long tail. In 1944, Philip Hershkovitz published a revision of the genus Nectomys as then understood, and in comparing it to what is now Sigmodontomys alfari, he listed, in a footnote, the names he understood as synonyms of Oryzomys albigularis. This list included both keaysi and obtusirostris, and since then the two have remained associated with each other and with O. albigularis, initially as synonyms or subspecies. By the 1990s, however, the distinctiveness of O. keaysi with respect to both O. albigularis and O. levipes was recognized, and as a result O. keaysi was again classified as a separate species, now with O. obtusirostris as a synonym. When O. albigularis and related species were transferred to the new genus Nephelomys in 2006, this arrangement remained in place, but with the species now known as Nephelomys keaysi.

Animals of the same family as a Nephelomys keaysi

We found other animals of the Muridae family:

Animals with the same weight as a Nephelomys keaysi

As a comparison, here are some other animals that weight as much as the Oryzomys keaysi: