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Antarctic Neosquid

Alluroteuthis antarcticus Odhner 1923

Description

provided by NMNH Antarctic Invertebrates

Alluroteuthis antarcticus Odhner, 1923

OTHER SCIENTIFIC NAMES STILL IN USE:

Parateuthis tunicata Thiele, 1921

? Crystalloteuthis glacialis Clarke, 1980

VERNACULAR NAMES:

FAO/CCAMLR:

En - Antarctic neosquid

Fr - Louténe australe

Ru - Antarkticheskyi myagkotelyi kalmar

Sp - Neoluria antártica

NATIONAL:

DISTINCTIVE CHARACTER:

Mantle conical. Fins oval, anterior lobes absent, posterior lobes free. Head and eyes large; buccal connectives attach to dorsal bor­ders of arms IV. Funnel-locking cartilage straight, simple. No photophores. Tentacles relatively thin; clubs with 6 to 8 enlarged suckers on median rows of manus, many rows of very small, extremely numerous suckers on carpus, with a few pairs of suckers/knobs extending proximally along the stalk; arms robust; suckers on arms biserial, those on arm IV reduced in size.

Lower beak: has hood with a broad notch and lies close to crest; thickened wing fold with ridge has characteristic shape in profile and obscures jaw angle from side; jaw angle acute or recessed; crest broad and thic­kened; no fold or ridge on lateral wall.

DISTINGUISHING CHARACTERS OF SIMILAR SPECIES OCCURRING IN THE AREA:

Several families (Histioteuthidae, Bathyteuthidae and Psychroteithidae) have similar general characters, but can be differentiated as follows:

Histioteuthis species (Histioteuthidae): photophores present on mantle.

Bathyteuthis abyssicola (Bathyteuthidae): photophores present at bases of arms.

Psychroteuthis glacialis (Psychroteuthidae): posterior fin attachment concave.

SIZE:

Maximum reported mantle length 11 cm.

GEOGRAPHICAL DISTIRBUTION AND BEHAVIOR:

All sectors of the Antarctic Ocean; circumpolar.

An oceanic species, occurring in depths between 750 and 2800 m. A prey of sperm whales, elephant and Weddell seals. The annual consumption of this species by sperm whales in the Antarctic is estimated to be about 0.01 × 106 t.

INTEREST TO FISHERIES:

Currently none.”

(Roper et al, 1985: 169-170)

Antarctic neosquid

provided by wikipedia EN

The Antarctic neosquid (Alluroteuthis antarcticus) is the only neosquid in the genus Alluroteuthis.[2] The tentacles are relatively short compared to the arms.

Nils Hjalmar Odhner, discoverer of the species, suggested that Parateuthis tunicata, discovered by Johannes Thiele in 1920, might be a young Antarctic neosquid. The validity of this suggestion is still in question. The name is derived from its habitat in the Antarctic Ocean.

Distribution

Alluroteuthis antarcticus occurs in from depths of 0–2,800 m (epipelagic and mesopelagic waters), and paralarvae can be found in the upper 200 m (epipelagic waters).[1] Its range may be circumpolar with an Antarctic and Sub-Antarctic distribution.[3]

Ecology

It preys upon Antarctic krill, Antarctic silverfish and other squids.[1] However, Isotopic evidence suggests a diet in prey that are likely mesopelagic zooplankton that feed on sinking organic matter.[3]

References

  1. ^ a b c Barratt, I. & Allcock, L. (2014). "Alluroteuthis antarctica". IUCN Red List of Threatened Species. 2014: e.T163260A991014. doi:10.2305/IUCN.UK.2014-1.RLTS.T163260A991014.en.
  2. ^ a b ""Alluroteuthis antarcticus"". Tree of Life Web Project. Retrieved 9 November 2010.
  3. ^ a b Guerreiro, M.; Phillips, R.; Cherel, Y.; Ceia, F.; Alvito, P.; Rosa, R.; Xavier, J. (2015). "Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses" (PDF). Marine Ecology Progress Series. 530: 119–134. doi:10.3354/meps11266.
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Antarctic neosquid: Brief Summary

provided by wikipedia EN

The Antarctic neosquid (Alluroteuthis antarcticus) is the only neosquid in the genus Alluroteuthis. The tentacles are relatively short compared to the arms.

Nils Hjalmar Odhner, discoverer of the species, suggested that Parateuthis tunicata, discovered by Johannes Thiele in 1920, might be a young Antarctic neosquid. The validity of this suggestion is still in question. The name is derived from its habitat in the Antarctic Ocean.

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visit source
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wikipedia EN

Habitat

provided by World Register of Marine Species
meso-bathypelagic

Reference

van der Land, J. (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO).

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Jacob van der Land [email]