NATURAL HISTORY · CATALOGUE RECORD
Thomas' Ichthyomyine
Rheomys thomasi Dickey, 1928
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
Thomas's water mouse (Rheomys thomasi) is a species of rodent in the family Cricetidae found in El Salvador, Guatemala, and Mexico at altitudes of 400 to 2700 m. It lives near forest streams and is semiaquatic; its carnivorous diet includes both invertebrates and small vertebrates. The conservation status of the species is rated as "near threatened" because of the small size of its range and the threat of degradation of its habitat, including the water quality of the streams it lives along.
Wikipedia contributors, Thomas's water mouse; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T07:42:33.106736+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Rheomys thomasi Dickey, 1928
- Name authority
- Dickey, 1928
- Common name
- Thomas' Ichthyomyine
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Rheomys
- 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
- genusRheomys Thomas, 1906
- speciesRheomys thomasi Dickey, 1928
Close classified relatives
These entries share the source’s genus, Rheomys. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Underwood's IchthyomyineRheomys underwoodi Thomas, 1906 | CricetidaeChordata | Accepted speciesRecorded extant |
| Goodwin's Water MouseRheomys mexicanus Goodwin, 1959 | CricetidaeChordata | Accepted speciesRecorded extant |
| Goldman's IchthyomyineRheomys raptor Goldman, 1912 | 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 |
|---|---|
| Rheomys thomasi stirtoni Dickey, 1928 Dickey, 1928 | synonym |
| Rheomys thomasi chiapensis Hooper, 1947 Hooper, 1947 | 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=633335 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:4S62Z. Classification follows source parent identifiers. English common names may vary by region.