Cephaloscyllium silasi (Talwar, 1974)
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
The Indian swellshark (Cephaloscyllium silasi) is a catshark of the family Scyliorhinidae found in the western Indian Ocean near Quilon, India and Sauqira Bay, Oman. Specimens caught as bycatch near North Sentinel Island of the Andaman and Nicobar Islands have been genetically identified as Indian swellsharks, expanding its known range to the Andaman Sea. It grows to about 36 cm in length, and can expand its body by taking in air or water to make it appear larger to predators.
The shark is considered to be critically endangered. It is threatened by fishing pressure as it is caught incidentally by deep-water trawling practices, which occur throughout its entire known range.
Wikipedia contributors, Indian swellshark; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T19:16:04.693797+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Cephaloscyllium silasi (Talwar, 1974)
- Name authority
- (Talwar, 1974)
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Elasmobranchii
- Order
- Carcharhiniformes
- Family
- Scyliorhinidae
- Genus
- Cephaloscyllium
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: yes · Freshwater: no · 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
- parvphylumChondrichthyes
- classElasmobranchii
- subclassNeoselachii
- infraclassSelachii
- superorderGaleomorphi
- orderCarcharhiniformes
- familyScyliorhinidae Gill, 1862
- genusCephaloscyllium Gill, 1862
- speciesCephaloscyllium silasi (Talwar, 1974)
Close classified relatives
These entries share the source’s genus, Cephaloscyllium. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Cephaloscyllium albipinnum Last, Motomura & White, 2008 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium laticeps (Duméril, 1853) | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium hiscosellum White & Ebert, 2008 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Blotchy swell sharkCephaloscyllium umbratile Jordan & Fowler, 1903 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium sarawakense Yano, Ahmad & Gambang, 2005 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium signourum Last, Séret & White, 2008 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium pictum Last, Séret & White, 2008 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| swell sharkCephaloscyllium ventriosum (Garman, 1880) | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium zebrum Last & White, 2008 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium stevensi Clark & Randall, 2011 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium fasciatum Chan, 1966 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Scyliorhinus silasi Talwar, 1974 Talwar, 1974 | synonym |
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://www.marinespecies.org/aphia.php?p=taxdetails&id=277103 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:69JXP. Classification follows source parent identifiers. English common names may vary by region.