NATURAL HISTORY · CATALOGUE RECORD
Big-headed Rice Rat
Euryoryzomys legatus (Thomas, 1925)
Source-backed taxonomic record
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
Euryoryzomys legatus, also known as the Tarija oryzomys or big-headed rice rat, is a species of rodent in the family Cricetidae. It now belongs to the genus Euryoryzomys, having previously been placed in Oryzomys. It is found in the eastern Andes of northwestern Argentina and southern Bolivia.
Wikipedia contributors, Euryoryzomys legatus; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T08:16:14.811114+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Euryoryzomys legatus (Thomas, 1925)
- Name authority
- (Thomas, 1925)
- Common name
- Big-headed Rice Rat
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Euryoryzomys
- 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.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classMammalia Linnaeus, 1758
- subclassTheria Parker & Haswell, 1897
- infraclassEutheria Gill, 1872
- orderRodentia Bowdich, 1821
- suborderMyomorpha Brandt, 1855
- superfamilyMuroidea Illiger, 1811
- familyCricetidae Fischer, 1817
- subfamilySigmodontinae Wagner, 1843
- genusEuryoryzomys Weksler, Percequillo & Voss, 2006
- speciesEuryoryzomys legatus (Thomas, 1925)
Close classified relatives
These entries share the source’s genus, Euryoryzomys. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Emmons' OryzomysEuryoryzomys emmonsae (Musser, Carleton, Brothers & Gardner, 1998) | CricetidaeChordata | Accepted speciesRecorded extant |
| MacConnell's OryzomysEuryoryzomys macconnelli (Thomas, 1910) | CricetidaeChordata | Accepted speciesRecorded extant |
| Elegant OryzomysEuryoryzomys nitidus (Thomas, 1884) | CricetidaeChordata | Accepted speciesRecorded extant |
| Russet OryzomysEuryoryzomys russatus (Wagner, 1848) | CricetidaeChordata | Accepted speciesRecorded extant |
| Buffy-sided OryzomysEuryoryzomys lamia (Thomas, 1901) | CricetidaeChordata | Accepted speciesRecorded extant |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Oryzomys legatus Thomas, 1925 Thomas, 1925 | synonym |
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.
- https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=972471 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:3D5RB. Classification follows source parent identifiers. English common names may vary by region.