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Cephaloscyllium hiscosellum

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA CHONDRICHTHYES CARCHARHINIFORMES SCYLIORHINIDAE

Scientific Name: Cephaloscyllium hiscosellum
Species Authority: White & Ebert, 2008
Common Name(s):
English Reticulate Swellshark
Taxonomic Notes:

The Reticulate Swellshark (Cephaloscyllium hiscosellum) was considered by Last and Stevens (1994) to be conspecific with C. fasciatum Chan, 1966. White and Ebert (2008), however, described it as a distinct species, which is endemic to northwestern Australia.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2010-01-20
Assessor(s): Lisney, T.J. & Kyne, P.M.
Reviewer(s): Carlson, J. & Dulvy, N.
Justification:

The Reticulate Swellshark (Cephaloscyllium hiscosellum) was originally considered to be conspecific with C. fasciatum Chan, 1966, which was assessed globally in 2003 as Data Deficient, and within Australia as Least Concern. This Red List Assessment replaces that 2003 Least Concern assessment of the Australian population of C. fasciatum.

The Reticulate Swellshark is a small (to 52 cm total length), poorly known deepwater catshark, which is endemic to northwestern Australia in the Eastern Indian Ocean. This species occurs on the upper continental slope at depths of 294–420 m. Its biology is very poorly known. Little fishing occurs in the species’ area of occurrence off Australia, and with no threats evident, it is assessed as Least Concern. More information, however, is required on the species’ biology and species-specific landings in nearby fisheries.

Geographic Range [top]

Range Description:

The Reticulate Swellshark is endemic to northwestern Australia, from west of Leander Point to southwest of Rowley Shoals (White and Ebert 2008).

Countries:
Native:
Australia (Western Australia)
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no population information on the Reticulate Swellshark.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology:

The deepwater benthic Reticulate Swellshark has been recorded from the upper continental slope at depths of 294–420 m (White and Ebert 2008, Last and Stevens 2009). Maximum size of this small species is at least 52 cm total length (TL), with males mature at ~46 cm TL (White and Ebert 2008, Last and Stevens 2009). Nothing else is known of the biology of the species, except that it is oviparous (Last and Stevens 2009).

Systems: Marine

Use and Trade [top]

Use and Trade: There is no use or trade of the Reticulate Swellshark.

Threats [top]

Major Threat(s):

The range of Reticulate Swellshark off Western Australia is only subject to low fishing effort through the Australian Commonwealth managed Western Trawl Fisheries.

Conservation Actions [top]

Conservation Actions: There are no conservation actions in place for the Reticulate Swellshark.

Citation: Lisney, T.J. & Kyne, P.M. 2011. Cephaloscyllium hiscosellum. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 30 July 2014.
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