Rossia
| Rossia | ||||||||||||
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Rossia pacifica , buried in sand |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Rossia | ||||||||||||
| Owen , 1834 |
Rossia is a genus of the dwarf squid family.
features
Rossia are small squids, the length of the coat of many species is less than 50 mm. The shell is reduced to a chitinous gladius . The coat is short, wide and bag-like. The posterior lobe of the fin is free, large and round. An ink sack is present and functional, the anal valves are well developed. There are 10 limbs around the mouth region, the suction cups are equipped with chitinous rings. The first two arms are hectocotyles . The suction cups in the middle of arms II and III are not enlarged very much. The clubs of the catch tentacles are widened with 6 to 12 suction cups in a row. An oral membrane is present. All the teeth of the radula have a single point.
distribution
The range includes the Arctic , the boreal Atlantic and Pacific as well as the tropical western Atlantic.
Habitat and way of life
Rossia are benthic dwarf squid that generally occur at depths greater than 50 m.
species
- Rossia brachyura
- Rossia bullisi
- Rossia glaucopis
- Rossia macrosoma
- Rossia megaptera
- Rossia moelleri
- Rossia mollicella
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Rossia pacifica
- Rossia pacifica diegensis
- Rossia pacifica pacifica
- Rossia palpebrosa
- Rossia tortugaensis
Individual evidence
- ↑ World Register of Marine Species: Rossia Owen, 1834
- ^ A b c d Richard E. Young, Michael Vecchione: Rossia Owen, 1834. Version 21 January 2014. Online in The Tree of Life Web Project, tolweb.org
- ↑ a b c Marine Species Identification Portal: Genus Rossia
