Narcine
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| Henle , 1834 |
Narcine is a genus of cartilaginous fish from the order of the electric ray-like (Torpediniformes).
features
Narcine species are small rays that reach a total length of between 30 and 65 cm. The largest species, Narcine entemedor , becomes a maximum of 120 cm long. The back side is usually light, brown, purple-brown or reddish in color. Some species show a pattern of bright spots, eye spots, bands, or dots. The points can also be dark. The belly of the animals is usually whitish or cream-colored. The edges of the body disc are occasionally dark in larger specimens. The Narcine's body disc- Species is oval and longer than wide. The front edge of the body disc is rounded or forms a wide angle. The skin is smooth and soft with no denticles or thorns. Their eyes are well developed and are the same size or larger than the round injection holes directly behind them . The nostrils are small and round. The mouth is protractile and wider than the distance between the nostrils. In the upper jaw the fish have 8 to 27 teeth, in the lower jaw 5 to 30 teeth with flat crowns. The teeth are arranged in a quincunx- like pattern. The five gill slits on each side of the body are short and straight behind one another. The electrical organs begin in front of the eyes and extend to the rear edge of the body disc. The attachment of the pelvic fins lies below the body disc. The tail is broad at the base and tapers towards the caudal fin. It is longer than the body disc. Both dorsal fins are similar in shape and size. The first stands just behind the rear end of the pelvic fins. The distance between the two dorsal fins and the distance between the second dorsal fin and the caudal fin are about the same. The caudal fin is fan-shaped and rounded. Narcine species have 100 to 125 vertebrae.
species
- Narcine atzi Carvalho & Randall, 2003 .
- Narcine baliensis Carvalho & White, 2016 .
- Narcine bancroftii (Griffith & Smith, 1834) .
- Narcine brasiliensis (Olfers, 1831) . ( Type species )
- Narcine brevilabiata Bessednov, 1966 .
- Narcine brunnea Annandale, 1909 .
- Narcine entemedor Jordan & Starks, 1895 .
- Narcine indica Henle , 1834 .
- Narcine insolita Carvalho, Séret & Compagno, 2002 .
- Narcine leoparda Carvalho, 2001 .
- Narcine lingula Richardson , 1846 .
- Narcine maculata (Shaw, 1804) .
- Narcine oculifera Carvalho, Compagno & Mee, 2002 .
- Narcine prodorsalis Bessednov, 1966 .
- Narcine rierai (Lloris & Rucabado, 1991) .
- Narcine timlei ( Bloch & Schneider , 1801) .
- Narcine vermiculatus Breder, 1928 .
The Australian species formerly belonging to Narcine were separated and now form the genus Narcinops .
supporting documents
- ^ David A. Ebert: Deep-sea Cartilaginous Fishes of the Indian Ocean. Volume 2 Batoids and Chimaeras . FAO Species Catalog for Fishery Purposes No. 8, Vol. 2, ISSN 1020-8682. Page 27.
- Jump up ↑ Last, PR, White, WT, Carvalho, MR, Séret, B., Stehmann, M. & Naylor, GJP Rays of the World. CSIRO Publishing: Melbourne. ISBN 9780643109131
Web links
- Narcine on Fishbase.org (English)