NATURAL HISTORY · CATALOGUE RECORD
Cajamarca Thomasomys
Thomasomys praetor (Thomas, 1900)
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
The Cajamarca Oldfield mouse (Thomasomys praetor) is a species of rodent in the family Cricetidae. It is present in the Andes of northwestern Peru, where its habitats include shrubby páramo, montane forest, and secondary forest. The rodent is nocturnal and may be partly arboreal. It was formerly considered a subspecies of T. aureus. The common name comes from the Peruvian city and region of Cajamarca.
Wikipedia contributors, Cajamarca Oldfield mouse; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T07:42:08.951593+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Thomasomys praetor (Thomas, 1900)
- Name authority
- (Thomas, 1900)
- Common name
- Cajamarca Thomasomys
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Thomasomys
- 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
- genusThomasomys Coues, 1884
- speciesThomasomys praetor (Thomas, 1900)
Close classified relatives
These entries share the source’s genus, Thomasomys. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Golden Oldfield MouseThomasomys aureus (Tomes, 1860) | CricetidaeChordata | Accepted speciesRecorded extant |
| Beady-eyed MouseThomasomys baeops (Thomas, 1899) | CricetidaeChordata | Accepted speciesRecorded extant |
| Cinnamon-colored ThomasomysThomasomys cinnameus Anthony, 1924 | CricetidaeChordata | Accepted speciesRecorded extant |
| Peruvian Oldfield MouseThomasomys eleusis Thomas, 1926 | CricetidaeChordata | Accepted speciesRecorded extant |
| Gracile ThomasomysThomasomys gracilis Thomas, 1917 | CricetidaeChordata | Accepted speciesRecorded extant |
| Hudson's ThomaomysThomasomys hudsoni Anthony, 1923 | CricetidaeChordata | Accepted speciesRecorded extant |
| Ladew's Oldfield MouseThomasomys ladewi Anthony, 1926 | CricetidaeChordata | Accepted speciesRecorded extant |
| Large-eared ThomasomysThomasomys macrotis Gardner & Romo R., 1993 | CricetidaeChordata | Accepted speciesRecorded extant |
| Unicolored Oldfield MouseThomasomys monochromos Bangs, 1900 | CricetidaeChordata | Accepted speciesRecorded extant |
| Rhoads's Oldfield MouseThomasomys rhoadsi Stone, 1914 | CricetidaeChordata | Accepted speciesRecorded extant |
| Ucucha ThomasomysThomasomys ucucha Voss, 2003 | CricetidaeChordata | Accepted speciesRecorded extant |
| Dressy Oldfield MouseThomasomys vestitus (Thomas, 1898) | CricetidaeChordata | Accepted speciesRecorded extant |
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=970750 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:56JKR. Classification follows source parent identifiers. English common names may vary by region.