Cephaloscyllium signourum Last, Séret & White, 2008
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 flagtail swellshark (Cephaloscyllium signourum) is a little-known species of catshark, belonging to the family Scyliorhinidae, found at a depth of 480–700 m (1,570–2,300 ft) off northeastern Queensland, and possibly also nearby islands. This stout-bodied shark has a short, broad, and flattened head with a capacious mouth. Adults have a variegated brown coloration with 9–10 darker dorsal saddles and V-shaped blotch at the tip of the upper caudal fin lobe. Juveniles are yellow with narrow brown bars instead of saddles, and a distinctive marking between the spiracles shaped like two loops connected by a line. Like other swellsharks, this species can inflate its body when threatened.
Wikipedia contributors, Flagtail 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 signourum Last, Séret & White, 2008
- Name authority
- Last, Séret & White, 2008
- 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 signourum Last, Séret & White, 2008
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 pictum Last, Séret & White, 2008 | ScyliorhinidaeChordata | Accepted speciesExtinction status not supplied |
| Cephaloscyllium silasi (Talwar, 1974) | 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 |
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.
- Last, P. R., Séret, B., & White, W. T. (2008). New swellsharks (Cephaloscyllium: Scyliorhinidae) from the Indo-Australian region. In Last, P.R., White, W.T. & Pogonoski, J.J. (Eds.): Descriptions of New Australian Chondrichthyans. CSIRO Marine and Atmospheric Research Paper No. 22. 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:5XK9P. Classification follows source parent identifiers. English common names may vary by region.