Pocket shark

from Wikipedia, the free encyclopedia
Pocket shark
Systematics
Sharks (selachii)
Superordinate : Squalomorphii
Order : Spiny dogfish (Squaliformes)
Family : Dalatiidae
Genre : Mollisquama
Type : Pocket shark
Scientific name
Mollisquama parini
Dolganov , 1984

The pocket shark ( Mollisquama parini ) is a small species of shark from the Dalatiidae family . The holotype, at the same time the only known specimen of the species, was a growing female, had a body length of over 40 centimeters and was caught in the deep sea in the southeastern Pacific far off the coast of Chile . A second specimen, a just born male, only 14.2 cm long, was caught in the Gulf of Mexico in 2010 . It differs from the holotype in the number of vertebrae and tooth morphology and has been assigned to a new species of the genus Mollisquama .

Appearance and characteristics

The pocket shark is a small shark with a known body length of over 40 centimeters, with the holotype being a not yet sexually mature female. It has an elongated body typical of the spiny dogfish relatives, the head is short and tapered with thick lips. The body color is brown throughout, the fins are lined with light.

It has no anal fin and two dorsal fins . The first dorsal fin begins far behind the end of the pectoral fins , directly in front of the pelvic fin attachment, and is about the same size as the second dorsal fin. The caudal fin is asymmetrical. The animals have five medium-sized gill slits , the last being about twice as long as the first, and a spray hole behind the eye. A noticeable slit-shaped opening at the base of the pectoral fin, the function of which is unknown. Compagno represents the possibility that a fluorescent secretion could be produced in the pocket behind .

distribution

Site of the holotype of the pocket shark

The range of this species is not known. The holotype comes from a deep-sea trench at a depth of about 330 meters in the southeastern Pacific about 1200 km off the coast of Chile .

Way of life

Behavior, reproduction and way of life of this species are unknown. Due to the lack of data, it is listed in the IUCN Red List as "data deficient".

supporting documents

  1. ↑ UN Dolganov: A new shark from the family Squalidae caught on the Naska submarine ridge. Zoolicheskii Zhurnal 63 (10), 1984; Pp. 1589-1591.
  2. ↑ Grace, MA, Doosey, MH, Bart, HL & Naylor, GJP (2015): First record of Mollisquama sp. (Chondrichthyes: Squaliformes: Dalatiidae) from the Gulf of Mexico, with a morphological comparison to the holotype description of Mollisquama parini Dolganov. Zootaxa , 3948 (3): 587-600. doi: 10.11646 / zootaxa.3948.3.10
  3. ↑ Grace, MA, Doosey, MH, Denton, JSS, Naylor, GJP, Bart, HL, Jr. & Maisey, JG (2019): A new Western North Atlantic Ocean kitefin shark (Squaliformes: Dalatiidae) from the Gulf of Mexico. Zootaxa, 4619 (1): 109-120. doi: 10.11646 / zootaxa.4619.1.4
  4. ^ A b c d Leonard Compagno, Marc Dando, Sarah Fowler: Sharks of the World. Princeton Field Guides, Princeton University Press, Princeton and Oxford 2005; P. 129, ISBN 978-0-691-12072-0 .
  5. ↑ Mollisquama parini in the IUCN Red List of Threatened Species 2010.1. Posted by: L. Leandro (SSG South America Regional Workshop, June 2003), 2004. Retrieved April 15, 2010.

Web links

literature