Clarias insolitus is a catfish within the genus Clarias, found in the upper drainage of the Barito River, in Kalimantan, Indonesian Borneo.[2]
| Clarias insolitus | |
|---|---|
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) | |
Habitat
editIt lives in mostly small streams in the Barito Ulu region, literally "upstream Barito". Specific habitat details have not been mentioned .[2]
Characteristics
editCollected 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).
See also
editReferences
edit- ^ 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.
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