Overview

Distribution

Arctic species. Central Arctic Basin, North Sea, Norwegian Sea, Barents Sea, Laptev Sea, Greenland Sea, Chukchi Sea, Beaufort Sea, Gulf of Maine

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© Elizaveta A. Ershova

Source: iArcZoo

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Physical Description

Morphology

Female: Cephalothorax with widened front third, head fused with thorax, rounded from side view. Posterior corners of the last thoracic segment short, divergent, end before the middle of genital segment. Abdomen is 2.3-2 times shorter cephalothorax, the genital segment is slightly shorter than the combined length of the next 2 segments. Ventral projection very slight. The back edges of the first three segments with serrations. A1 reach the middle of the second abdominal segment. Endopodite of A2 almost 2 times shorter than the exopodite. The outer edge of the second basipodite of P1 with a small spine. Posterior corners of the last thoracic segment. Apical spines of exopodites of P1-P4 coarsely and sharply serrated.

Male: Smaller than female. P5 with no signs of endopodites, each leg five-segmented. A1 about as long as the cephalothorax.

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© Elizaveta A. Ershova

Source: iArcZoo

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Size

Female: 3,50-4,60 mm
Male: 2,90-3,3 mm

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© Elizaveta A. Ershova

Source: iArcZoo

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Diagnostic Description

Endopodite of P2 one-segmented. Abdomen longer than 1/3 of cephalothorax. Posterior corners of the last thoracic segment short, divergent. Spermatheca much smaller than in other species of the genus. Male with uniramous P5, the right is longer than the left.

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© Elizaveta A. Ershova

Source: iArcZoo

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Ecology

Habitat

Depth range based on 104 specimens in 1 taxon.
Water temperature and chemistry ranges based on 77 samples.

Environmental ranges
  Depth range (m): 0 - 1090
  Temperature range (°C): -1.665 - 2.064
  Nitrate (umol/L): 0.485 - 14.762
  Salinity (PPS): 25.839 - 34.955
  Oxygen (ml/l): 6.264 - 9.185
  Phosphate (umol/l): 0.467 - 1.717
  Silicate (umol/l): 4.913 - 33.592

Graphical representation

Depth range (m): 0 - 1090

Temperature range (°C): -1.665 - 2.064

Nitrate (umol/L): 0.485 - 14.762

Salinity (PPS): 25.839 - 34.955

Oxygen (ml/l): 6.264 - 9.185

Phosphate (umol/l): 0.467 - 1.717

Silicate (umol/l): 4.913 - 33.592
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Oceanic, epi-meso-bathypelagic species. In polar water found at small depths and near the surface, in lower latitudes at depths of 200-800 m.

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© Elizaveta A. Ershova

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Trophic Strategy

Opprotunistic omnivores; mainly feed phytoplankton and/or phytodetritus, but may also consume microzooplankton and copepod nauplii

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Life History and Behavior

Reproduction

Produce egg-sacs with a thick enclosing membrane, which contains 25-50 bright orange eggs.

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Disclaimer

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