Pseudomystus nuchalis

Pseudomystus nuchalis Ng, 2025

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drawing shows typical species in Bagridae.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Siluriformes (Catfishes) > Bagridae (Bagrid catfishes)
Etymology: Pseudomystus: Greek, pseudes = false + Greek, mystax = whiskered, used by Belon in 1553 to describe all fishes with whiskers (Ref. 45335); nuchalis: Name 'nuchalis' from the Latin words 'nucha' meaning 'the nape of the neck', in reference to the nuchal concavity of this new species.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal. Tropical

Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Asia: Malaysia.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 9.4 cm SL male/unsexed; (Ref. 138063)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 6; Anal soft rays: 9 - 11. This species is distinguished from its congeners by the following set of characters: colour pattern of pale yellow patches on the body; presence of nuchal concavity; snout 55-63% HL; adipose fin more anteriorly positioned relative to the anal fin (adipose-fin origin at vertical through anal-fin origin); presence of pale yellow patches on the body never coalescing to form irregular bands; absence of a supracleithral process; adipose fin with a base 13.2-19.0% SL, whose posterior insertion is separate from the dorsal procurrent caudalfin rays; nuchal plate with straight or slightly convex margins; head 22.1-24.5% SL; and adipose-fin base 13.2-19.0% SL (Ref. 138063).
Body shape (shape guide): elongated; Cross section: oval.

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Ng, H.H., 2025. Clarifying the identity of Pseudomystus stenomus, with the description of a new species of Pseudomystus from Borneo (Actinopterygii: Bagridae). Raffles Bull. Zool. 73:318-335. (Ref. 138063)

IUCN Red List Status (Ref. 130435: Version 2025-2)

Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: of no interest
FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items (preys)
Diet composition
Food consumption
Food rations
Predators
Ecology
Ecology
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
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Eggs
Egg development
Larvae
Larval dynamics
Distribution
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BRUVS - Videos
Anatomy
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Physiology
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Nutrients
Oxygen consumption
Swimming type
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Visual pigments
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Diseases & Parasites
Toxicity (LC50s)
Genetics
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Heterozygosity
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Ciguatera cases
Stamps, coins, misc.
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Taxonomy
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References
References

Tools

E-book | Field guide | Length-frequency wizard | Life-history tool | Point map | Catch-MSY |

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Common names | Photos

Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic level (Ref. 69278):  3.2   ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100). 🛈