Clarias nigricans Ng, 2003
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
Clarias nigricans is a species of clariid catfish. It is only known from the Mahakam River in eastern Borneo. The eel-like catfish of this region were long assumed to belong to the widespread species Clarias nieuhofii but examination of 6 specimens purchased from a fish market in Samarinda in 1999 and preserved specimens from the same location revealed consistent and distinctive differences indicating a separate species.
This is an elongated catfish up to 30.8 cm (12.1 inches) standard length. Compared to C. nieuhofii it has a "neck" distinctly narrower than the head, giving the head an egg-shaped appearance when viewed from above or below and the overall colour is much darker: purplish grey with much fainter white spots arranged in one row below the lateral line instead of two. It is a omnivore.
Wikipedia contributors, Clarias nigricans; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T19:21:43.937479+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Clarias nigricans Ng, 2003
- Name authority
- Ng, 2003
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Siluriformes
- Family
- Clariidae
- Genus
- Clarias
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: no · Freshwater: yes · Terrestrial: no. These do not form a complete habitat description.
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
- gigaclassActinopterygii
- superclassActinopteri
- classTeleostei
- orderSiluriformes
- familyClariidae Bonaparte, 1845
- genusClarias Scopoli, 1777
- speciesClarias nigricans Ng, 2003
Close classified relatives
These entries share the source’s genus, Clarias. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Clarias albopunctatus Nichols & La Monte, 1953 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias buthupogon Sauvage, 1879 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias cataractus (Fowler, 1939) | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias dumerilii Steindachner, 1866 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias pseudonieuhofii Sudarto, Teugels & Pouyaud, 2004 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias salae Hubrecht, 1881 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias dussumieri Valenciennes, 1840 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias longior Boulenger, 1907 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias olivaceus Fowler, 1904 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias dayi Hora, 1936 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias buettikoferi Steindachner, 1894 | ClariidaeChordata | Accepted speciesExtinction status not supplied |
| Clarias dhonti (Boulenger, 1920) | ClariidaeChordata | Accepted speciesExtinction status not supplied |
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.
- Ng, H. H. (2003). Clarias nigricans, a new species of clariid catfish (Teleostei: Siluriformes) from eastern Borneo. Raffles Bulletin of Zoology, 51. 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:VRDY. Classification follows source parent identifiers. English common names may vary by region.