|Scientific Name:||Apristurus internatus|
|Species Authority:||Deng, Xiong & Zhan, 1988|
|Taxonomic Notes:||The genus Apristurus contains at least 32 described species and a relatively large number of potentially undescribed ones. Morphological conservatism and, until recently, a lack of objectively defined characters makes this one of the most taxonomically confused shark genera (Compagno 1984, Nakaya and Sato 1999).
Nakaya and Sato (1999) defined three species groups within Apristurus: the longicephalus-group (two species), brunneus-group (20 species) and spongiceps-group (10 species). A. internatus belongs to the brunneus-group, characterized by: a short, wide snout (prenarial length < 6% TL); 13 to 22 valves in the spiral intestine; upper labial furrows obviously longer than the lower furrows; a discontinuous supraorbital sensory canal.
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Assessor(s):||Duffy, C. & Huveneers, C.|
|Reviewer(s):||Kyne, P.M., Cavanagh, R.D. & Fowler, S.L. (Shark Red List Authority)|
Apristurus internatus is known only from the holotype (a 49.1 cm total length (TL) female) and a paratype (a 40.3 cm TL male), both caught in the East China Sea. Probably taken as bycatch in deepwater trawl fisheries. Insufficient information is available to assess this species beyond Data Deficient.
|Range Description:||This species is known only from the holotype, a 41.9 cm TL female, and the paratype, a 40.3 cm TL male, both from the East China Sea.|
|FAO Marine Fishing Areas:|
Pacific – northwest
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Known from only two specimens.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Apristurus species are relatively small, sluggish sharks that live on or near the bottom on the upper continental slope. Diet includes crustaceans (penaeid shrimps, euphausiids), squids and small fishes. Where known reproduction is oviparous with one egg per oviduct. Egg cases are usually thick-walled and about 5 to 6.8 cm long and 2.5 to 2.9 cm case has a long weak fibrous thread on each corner. The posterior end usually has two small processes, each with a long coiled tendril. As in shallow water scyliorhinids the coiled tendrils are probably used to attach the egg cases to hard substrates and/or biogenic structures as they are laid.|
|Major Threat(s):||Probably taken as bycatch in deepwater trawl fisheries.|
|Conservation Actions:||No conservation measures are in place for this species.|
IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 23 November 2004).
IUCN SSC Shark Specialist Group. Specialist Group website. Available at: http://www.iucnssg.org/.
Nakaya, K. and Sato, K. 1999. Species grouping within the genus Apristurus (Elasmobranchii: Scyliorhinidae). In: B. Séret and J.-Y. Sire (eds). Proceedings of the 5th Indo-Pacific Fish Conference (Nouméa, 3-8 November 1997). Paris, Society Francaise d’Ichthyologie et Instutue de Recherches pour le Development: 307–320.
|Citation:||Duffy, C. & Huveneers, C. 2004. Apristurus internatus. The IUCN Red List of Threatened Species 2004: e.T44213A10872522.Downloaded on 28 March 2017.|
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