Chaco Crimson-nosed Rat

Open encyclopedia reference

Bibimys chacoensis is a species of small rodent of the family Cricetidae living in the north-central part of Southern Cone of South America. The common name of this species is Chaco crimson-nosed rat (in Spanish: ratón de hocico rosado norteño [Northern pink-nosed mouse]). It is one of the three species currently recognized under the genus Bibimys. The species was described in 1931 by zoologist Harold H. Shamel, under the denomination of Akodon chacoensis. The etymology of this species is a toponym for the locality where the type material was collected, Chaco Province in Argentina. The exact locality in the label is: "Las Palmas, provincia del Chaco, Argentina". In 1980, Argentinian mammalogist, Elio Massoia, transferred it to genus Bibimys. Bibimys chacoensis is considered to be an endemic species of the gallery forests and open spaces of the Humid Chaco region between the provinces of Formosa Province, Chaco, and Misiones Province. It has been also reported from Paraguay. According to the IUCN Red List of Threatened Species, Bibimys chacoensis is listed as a species of least concern.

Wikipedia contributors, Bibimys chacoensis; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T10:10:52.573756+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Bibimys chacoensis (Shamel, 1931)

Name authority

(Shamel, 1931)

Common name

Chaco Crimson-nosed Rat

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Rodentia

Family

Cricetidae

Genus

Bibimys

Extinction status

Recorded extant

Classification family tree

Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumOsteichthyes
7. megaclassTetrapoda
8. classMammalia Linnaeus, 1758
9. subclassTheria Parker & Haswell, 1897
10. infraclassEutheria Gill, 1872
11. orderRodentia Bowdich, 1821
12. suborderMyomorpha Brandt, 1855
13. superfamilyMuroidea Illiger, 1811
14. familyCricetidae Fischer, 1817
15. subfamilySigmodontinae Wagner, 1843
16. genusBibimys Massoia, 1979
17. speciesBibimys chacoensis (Shamel, 1931)

Close classified relatives

No other member of this genus is present in the selected snapshot.

Browse 593 records assigned to Cricetidae.

Documented distribution

Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.

Source literature & publication evidence

References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.

1. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=633082 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references

Origins, evidence & remaining research

Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.

Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.

Dataset citation & attribution

This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11

Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.

Stable key: col:5WJNG. Classification follows source parent identifiers. English common names may vary by region.