Notoliparis kermadecensis

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Notoliparis kermadecensis
Systematics
Order : Perch-like (Perciformes)
Subordination : Cottoidei
Partial order : Bull relatives (Cottales)
Family : Disc bellies (Liparidae)
Genre : Notoliparis
Type : Notoliparis kermadecensis
Scientific name
Notoliparis kermadecensis
( Nielsen , 1964)

Notoliparis kermadecensis ( Syn .: Careproctus kermadecensis ) is a deep-sea fish from the family of the disc bellies (Liparidae). It lives in the southwestern Pacific and has so far only been found in the Kermadec Trench north of New Zealand . Holotype and paratypes of the species come from depths of 6660 to 6770 meters, film recordings of eating fish that were made in 2009 come from a depth of 7560 meters. According to current knowledge, Notoliparis kermadecensis is the deepest species of fish on the southern hemisphere. Only pseudoliparis amblystomopsis and Pseudoliparis swirei from the North Pacific Japan trench , Kuril-Kamchatka Trench and Marianengraben were in even greater depths detected (7700 meters).

features

Notoliparis kermadecensis becomes about 28 cm long and has an elongated, laterally flattened body with a loose-fitting skin without papillae. The greatest body height is 20% of the standard length , the head length is 19 to 21% of the standard length. The head is wider than it is high. There are six rows of teeth in the front part of the jaw, on the premaxillary and dentals , and only two or three in the back. The maxillary and palate are edentulous. As is typical for disc bellies living in the deep sea, the teeth are simply pointed and slightly curved. The long dorsal fin begins above the middle of the pectoral fins. The first five to six rays are very short and only reach a quarter to half the length of the following rays. They are surrounded by loose skin and their distance from one another is greater than the distance between the following fin rays. Both the dorsal fin and the anal fin have grown together with the caudal fin and form a fin edge. The suction disk for the characteristic and eponymous, formed from the pelvic fins, lies under the base of the pectoral fin. The number of vertebrae is 65, of which 13 are in the abdomen . The number of Branchiostegal rays is six. The bowel is short and has three pyloric tubes on its left side and four on the right. A pseudobranch ("eye gill gland") is missing. The gill trap rays are shaped like small blunt knots. Eleven lie on the lower section of the first gill arch.

Way of life

Notoliparis kermadecensis is so far only known from the Kermadec trench, where it is probably endemic . The lower position of the mouth and the well-developed suction discs suggest that it is a species of fish that lives directly on the seabed. The stomachs of the type specimens contained fish scales, vertebrae of fish, parts of crabs and the remains of amphipods , copepods and polos . Film recordings showed an average of nine snap movements of the mouth per minute.

literature

  • AJ Jamieson, T Fujii, M Solan, AK Matsumoto, PM Bagley and IG Priede: Liparid and macrourid fishes of the hadal zone: in situ observations of activity and feeding behavior. Proc. R. Soc. B 2009 276, 1037-1045, doi : 10.1098 / rspb.2008.1670
  • Jørgen G. Nielsen: Fishes from depths exceeding 6,000 meters. Pages 113-124, Galathea Report, Scientific Results of The Danish Deep-Sea Expedition Round the World 1950-52, Volume 7, Copenhagen 1964, PDF

Individual evidence

  1. ↑ Pseudoliparis amblystomopsis - Deepest Ocean Camera Views Surprisingly Cute Snailfish
  2. ↑ Gerringer, ME, Linley, TD, Jamieson, AJ, Goetze, E. & Drazen, JC (2017): Pseudoliparis swirei sp. nov .: A newly-discovered hadal snailfish (Scorpaeniformes: Liparidae) from the Mariana Trench. Zootaxa , 4358 (1): 161-177. DOI:: 10.11646 / zootaxa.4358.1.7

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