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Clarias insolitus
Conservation status
Data Deficient (IUCN 3.1)^[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Clariidae
Genus:	Clarias
Species:	C. insolitus
Binomial name
*Clarias insolitus* H. H. Ng, 2003
Holotype & Paratypes (Feb. 1991) Clarias insolitus (Borneo)

Clarias insolitus is a catfish within the genus Clarias, found in the upper drainage of the Barito River, in Kalimantan, Indonesian Borneo.^[2]

Habitat

It lives in mostly small streams in the Barito Ulu region, literally "upstream Barito". Specific habitat details have not been mentioned .^[2]

Characteristics

Collected as recent as 1991, the holotype length was 122.5 mm (or 4.8 inches) in SL, with 7 paratypes collected from the same area ranging from 53.5 to 139.7 mm (2.1-5.5 inches), though it hasn't been inferred about the specimen's matuirty status. The diagnosis has been defined by:^[2]

possessing canal pores on the head and body visible to the naked eye
possessing anterior fontanelles in the shape of a knife

It is further distinguishable from other clariids from the following characteristics (except for C. intermedius, C. meladerma, C. olivaceus, and C. planiceps):

having prominent serrations on the front edge of the pectoral spine
lacking white spots across its body

Further characteristics include:

a head with depressed form
skull oftentimes not readily visible, yet sometimes evident
occipital process (dorsal skull bone) acutely rounded
ovoid eyes
a gill membrane free from isthmus

Coloration has been noted to be violet-gray (or plum) in lateral and dorsal areas, with dorsal, anal and pectoral fins with the same coloring, sometimes ranging to translucent near margins. Pelvic fins are translucent. Barbels are violet-gray dorsally, yet paler ventrally (about light gray).

References

^ Ng, H.H. (2019). "Clarias insolitus". IUCN Red List of Threatened Species. 2019: e.T91226444A91226461. doi:10.2305/IUCN.UK.2019-2.RLTS.T91226444A91226461.en. Retrieved 12 April 2023.
^ ^a ^b ^c Ng, Heok Hee (2003). "Clarias insolitus, a new species of clariid catfish (Teleostei: Siluriformes) from southern Borneo" (PDF). Zootaxa. 284: 1–8. doi:10.11646/zootaxa.284.1.1. Retrieved 12 April 2023.

Taxon identifiers
Clarias insolitus	Wikidata: Q5501226 Wikispecies: Clarias insolitus CoL: VRBR EoL: 204927 FishBase: 61617 GBIF: 5202760 iNaturalist: 611724 IRMNG: 10147903 ITIS: 681171 IUCN: 91226444 Open Tree of Life: 3622364 Plazi: 6C55C189-5559-B8B6-D529-DE53C7B2BEDF WoRMS: 1009668 ZooBank: ABD05C99-5923-4E10-924D-EDC0E38EA001

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Habitat

Characteristics

See also

References