Dwarf squid
| Dwarf squid | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the order | ||||||||||||
| Sepiolida | ||||||||||||
| Fioroni , 1981 | ||||||||||||
| Scientific name of the family | ||||||||||||
| Sepiolidae | ||||||||||||
| Leach , 1817 |
The dwarf cuttlefish (Sepiolidae) are a family in the same order (Sepiolida) of squid , very closely with the cuttlefish are related.
features
Dwarf squid are generally smaller than cuttlefish , do not have a phragmocone and a rounder coat . The coat length is usually one to four, sometimes up to eight centimeters. In addition to eight arms fitted with suction cups, they have two catch tentacles.
Dwarf squids live in a symbiosis with bioluminescent bacteria, including Vibrio fischeri . They are located in a luminous organ in the coat of the cephalopod and are supplied with a sugar- amino acid solution. In return, they emit just enough light that the silhouette of the octopus disappears in the incident light when you look at it from below.
habitat
Most species live in shallow coastal waters of the Pacific , the Indian Ocean and the Atlantic and its marginal seas. They can move around both with the help of their fins and by recoil from their siphon .
Systematics
- Dwarf squid (Sepiolidae Leach, 1817)
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True dwarf squid (Sepiolinae Leach, 1817)
- Euprymna Steenstrup, 1887
- Sepiola Leach, 1817
- Rondeletiola Naef, 1921
- Sepietta Naef, 1912
- Inioteuthis Verrill, 1881
- Subfamily Rossiinae Appelöf, 1898
- Austrorossia Berry, 1918
- Rossia Owen, 1834
- Semirossia Steenstrup, 1881
- Neorossia v. Boletzky, 1971
- Subfamily Heteroteuthinae Appelöf, 1898
- Heteroteuthis Gray, 1849
- Stoloteuthis Verrill, 1881
- Iridoteuthis Naef, 1912
- Nectoteuthis Verrill, 1883
- Sepiolina Naef, 1912
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True dwarf squid (Sepiolinae Leach, 1817)
While the systematics of the squid is now generally accepted at family level, the classification of the larger groups within the squid is not yet stable. In their 2005 monograph, Jereb and Roper lead the Sepiolids again as a family within the Sepiida.
literature
- Patrizia Jereb and Clyde FE Roper: Cephalopods of the World - An Annotated and Illustrated Catalog of Cephalopod Species Known to Date. Volume 1 Chambered Nautiluses and Sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalog for Fishery Purposes, No. 4, 1: 1-262, Rome 2005 ISBN 9251053839
- Mark Norman: Cephalopods A World Guide. 319 pp., ConchBooks, Hackenheim 2000 ISBN 3-925919-32-5
- Kir Nazimovich Nesis: Cephalopods of the World - squids, cuttlefishes, octopuses, and allies. 351 pp., Neptune City, NJ: TFH Publ. ISBN 0-86622-051-8
