NATURAL HISTORY · CATALOGUE RECORD
Emmons' Oryzomys
Euryoryzomys emmonsae (Musser, Carleton, Brothers & Gardner, 1998)
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 emmonsae, also known as Emmons' rice rat or Emmons' oryzomys, is a rodent from the Amazon rainforest of Brazil in the genus Euryoryzomys of the family Cricetidae. Initially misidentified as E. macconnelli or E. nitidus, it was formally described in 1998. A rainforest species, it may be scansorial, climbing but also spending time on the ground. It lives only in a limited area south of the Amazon River in the state of Pará, a distribution that is apparently unique among the muroid rodents of the region.
Euryoryzomys emmonsae is a relatively large rice rat, weighing 46 to 78 g (1.6 to 2.8 oz), with a distinctly long tail and relatively long, tawny brown fur. The skull is slender and the incisive foramina (openings in the bone of the palate) are broad. The animal has 80 chromosomes and its karyotype is similar to that of other Euryoryzomys. Its conservation status is assessed as "Data Deficient", but deforestation may pose a threat to this species.
Wikipedia contributors, Euryoryzomys emmonsae; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T05:15:49.004008+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Euryoryzomys emmonsae (Musser, Carleton, Brothers & Gardner, 1998)
- Name authority
- (Musser, Carleton, Brothers & Gardner, 1998)
- Common name
- Emmons' Oryzomys
- 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 emmonsae (Musser, Carleton, Brothers & Gardner, 1998)
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 |
|---|---|---|
| Big-headed Rice RatEuryoryzomys legatus (Thomas, 1925) | 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 emmonsae Musser, Carleton, Brothers & Gardner, 1998 Musser, Carleton, Brothers & Gardner, 1998 | 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=972468 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:3D5R9. Classification follows source parent identifiers. English common names may vary by region.