Cirrhoscyllium
| Cirrhoscyllium | ||||||||||||
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Carpet saddle shark, Cirrhoscyllium japonicum |
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| Scientific name | ||||||||||||
| Cirrhoscyllium | ||||||||||||
| Smith & Radcliffe , 1913 |
Cirrhoscyllium is a genus within the real shark andthe collar carpet shark family . It includes three species that occur in very limited ranges around Japan , Taiwan and the South China Sea .
features
All species of the genus are small and very slender, elongated species. They reach a body length of less than 50 centimeters, whereby the Bartel carpet shark with a maximum known 33.5 centimeters is the smallest species and the saddle carpet shark with a maximum of 44 centimeters is the largest species. The underside of the body is flattened in a manner typical of shark species living on the ground. The two dorsal fins are very far back, the first dorsal fin arises in all species behind the pelvic fins and the second clearly behind the attachment of the anal fin .
Compared to the closely related species of the Parascyllium genus , Cirrhoscyllium species can be distinguished by having barbels in the throat area. In addition, the species of the Parascyllium genus are usually marked by a clear pattern with numerous spots and dots, while Cirrhoscyllium species only have saddle spots.
distribution
The three species of the genus Cirrhoscyllium each have a very narrow distribution area in Southeast Asia. The Bartel carpet shark occurs in the South China Sea in the area of the coasts of China , Vietnam and the Philippines . The Taiwanese carpet shark is found exclusively in the coastal area of Taiwan and the saddle carpet shark lives off the southern and eastern Pacific coasts of the Japanese islands of Kyushu and Shikoku .
They live on the Pacific continental shelf at depths below 100 meters up to 290 m with the saddle carpet shark.
Way of life
Very little information is available about the way of life of the three species. All species are likely to be oviparous and likely to feed on small fish and invertebrates.
Systematics
The genus Cirrhoscyllium consists of three species and forms together with the genus Parascyllium the family of collar carpet sharks (Parascyllidae) within the nurse shark-like (Orectolobiformes).
The three types are:
- Bartel-carpet shark ( Cirrhoscyllium expolitum Smith & Radcliffe in Smith, 1913 )
- Taiwan carpet shark ( Cirrhoscyllium formosanum Teng, 1959 )
- Saddle Carpet Shark ( Cirrhoscyllium japonicum Kamohara, 1943 )
Danger
A classification in the Red List of the International Union for Conservation of Nature (IUCN) is not available for all species. They are rare and are only occasionally caught as bycatch . The Taiwanese carpet shark has only been described by 12 individuals caught on bottom longlines.
literature
- Leonard Compagno , Marc Dando, Sarah Fowler: Sharks of the World. Princeton Field Guides, Princeton University Press , Princeton and Oxford 2005; Pp. 156-157. ISBN 978-0-691-12072-0
Web links
- Cirrhoscyllium on Fishbase.org (English)