Etmopterus caudistigmus
| Etmopterus caudistigmus | ||||||||||||
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| Scientific name | ||||||||||||
| Etmopterus caudistigmus | ||||||||||||
| Last , Burgess & Séret , 2002 |
Etmopterus caudistigmus is a species of the genus Etmopterus within the lantern sharks (Etmopterinae; also classified as the family Etmopteridae). Etmopterus caudistigmus reaches an average body length of about 31 centimeters. The distribution area of this species is in the southwestern Pacific off the coast of New Caledonia . It is known from only three specimens collected off New Caledonia, which were caught at depths of about 640 to 800 meters.
Appearance and characteristics
Etmopterus caudistigmus is a small shark with an average body length of about 31 centimeters; the maximum length is 34 centimeters. It has an elongated body typical of the lantern sharks with a long and at the same time wide and flattened head and a narrow snout. The body color is soot gray with a black underside. On the tail there are clear, species-typical light organs . On the head, back and sides of the body there are rows of small and closely spaced tooth scales that reach down to the caudal fin. It also has the light organs typical of the lantern sharks on the belly side.
It has no anal fin and two dorsal fins with the order-typical spines in front of the dorsal fins. The first dorsal fin begins behind the pectoral fins over their rear edge and is smaller than the second. The spine of the second dorsal fin is slightly curved and points forward in adult animals. The tail is long. Like all species in the family, the animals have five gill slits , which are very short in this species, and have an injection hole behind the eye.
distribution
The range of this species is in the southwest Pacific off the coast of New Caledonia , where the three known individuals were caught off Northwest Lifou and Reef Beautemps-Beaupré. Here it is known from depths of around 640 to 800 meters.
Way of life
Etmopterus caudistigmus lives in the deep sea area of the island shelf in a pelagic manner or near the ground . Like other sharks, it feeds in a predatory manner, likely on smaller fish and invertebrates. No data are available on his way of life.
Like other species of order, it is viviparous ( ovoviviparous ).
Systematics
Etmopterus caudistigmus is an independent species within the lantern shark . It was scientifically described in 2002 by Peter Robert Last , George H. Burgess and Bernard Séret .
The species name "caudistigmus" refers to the oval spot on the caudal fin.
Danger
Etmopterus caudistigmus is listed in the IUCN Red List as not endangered (“least concern”). There is no information about the population of the species. The only known specimens were taken as part of a sounding off the coast of New Caledonia. There are no known threats to the species as there is no deep sea trawling or deep sea longline fishing where it is found.
supporting documents
- ↑ a b Etmopteridae .: Lantern sharks. In: Compagno et al. 2004
- ↑ a b c d e f Leonard Compagno , Marc Dando, Sarah Fowler: Sharks of the World. Princeton Field Guides, Princeton University Press , Princeton and Oxford 2005; P. 97. ISBN 978-0-691-12072-0
- ↑ a b c Etmopterus caudistigmus on Fishbase.org (English)
- ^ A b Peter Robert Last, George H. Burgess, Bernard Séret: Description of six new species of lantern-sharks of the genus Etmopterus (Squaloidea: Etmopteridae) from the Australasian region. Cybium 26 (3), 2002; Pp. 203-223. Full text .
- ↑ a b Etmopterus caudistigmus in the endangered Red List species the IUCN 2008 Posted by: B. Finucci, PM Kyne, 2003. Accessed April 28, 2020th
literature
- Leonard Compagno , Marc Dando, Sarah Fowler: Sharks of the World. Princeton Field Guides, Princeton University Press , Princeton and Oxford 2005; P. 97. ISBN 978-0-691-12072-0
Web links
- Etmopterus caudistigmus on Fishbase.org (English)
