Oligoryzomys magellanicus
species of mammal
Oligoryzomys magellanicus, also known as the Patagonian colilargo and the Magellanic pygmy rice rat, is a species of rodent in the genus Oligoryzomys of the family Cricetidae. It is found in the southernmost parts of Argentina and Chile, including Tierra del Fuego and other outlying islands. Its karyotype has 2n = 54 and FNa = 66.
Taxonomy
There has been discussion as to whether Oligoryzomys magellanicus should be regarded as a full species or whether it should be considered to be a subspecies of Oligoryzomys longicaudatus. Milton H. Gallardo and Eduardo Palma (1990) recognised it as a valid species, basing their findings on "phallic morphology and karyotypic and morphometric data".
Description
The Magellanic pygmy rice rat has a head-and-body length about equal to the length of its tail. The ears are moderately large, and are rounded with hairs on both surfaces. The dorsal pelage is greyish-buff and the underparts are whitish. The upper surface of both fore and hind feet is white. Tufts of white hairs extend beyond the tips of the claws.
The public source identifies “Oligoryzomys magellanicus” as species of mammal. This brief keeps that definition visible, then builds a research path around Oligoryzomys, magellanicus and species.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Apr 26, 2026. The linked authority identifier is Q1764219. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1990.
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This entry incorporates text from “Oligoryzomys magellanicus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.