NATURAL HISTORY · CATALOGUE RECORD
Dunn's Water Snake
Hydromorphus dunni Slevin, 1942
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
Hydromorphus dunni, also known as Dunn's water snake, is a snake of the colubrid family. It is moderately-sized, reaching lengths of 482 millimetres (19.0 in), and has an olive-brown upperside, yellowish venter, and a gray underside to the tail. It is endemic to Panama, where it has a range stretching from Chiriquí east to the provinces of Colón and Panamá Oeste. It inhabits freshwater rainforest streams in dense lowland and premontane rainforests. It was long known from only its type locality near Boquete in Chiriquí and was not documented again for over 70 years before being a study found it to occur across much of the country in 2026.
Wikipedia contributors, Hydromorphus dunni; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T08:14:07.028824+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Hydromorphus dunni Slevin, 1942
- Name authority
- Slevin, 1942
- Common name
- Dunn's Water Snake
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Squamata
- Family
- Colubridae
- Genus
- Hydromorphus
- Extinction status
- Not supplied by this source
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
- classReptilia Laurenti, 1768
- orderSquamata Oppel, 1811
- suborderSerpentes Linnaeus, 1758
- infraorderAlethinophidia Nopcsa, 1923
- familyColubridae
- subfamilyDipsadinae
- genusHydromorphus
- speciesHydromorphus dunni Slevin, 1942
Close classified relatives
These entries share the source’s genus, Hydromorphus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Costa Rica Water SnakeHydromorphus concolor Peters, 1859 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
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://reptile-database.reptarium.cz/species?genus=Hydromorphus&species=dunni 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:3N7RC. Classification follows source parent identifiers. English common names may vary by region.