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Bradyidius armatus (Vanhöffen 1897)

Description

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Dark red body, ovaries purple, eye bright red and oblong in form

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cc-by-3.0
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Ershova, Elizaveta
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iArczoo

Diagnostic Description

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Female: Rostrum with divergent rami. First segment of exopodite of A2 without seta. Spermatheca rounded. Posterior corners of last thoracic segment go beyond the posterior border of the genital segment.

Male: P5 uniramous. Right P5 nearly 3 times shorter than the left. Distal segment of right P5 with 1 terminal small spine.

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Distribution

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North Atlantic and Atlantic sub-Arctic. Reports of this species in other locations (Antarctic, Red Sea, Indian Ocean, South China Sea, Sea of Japan, Bering Sea, Pacific Equatorial region) require confirmation.

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Habitat

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Epi-mesopelagic, hyperbenthic

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cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Morphology

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Female: Cephalothorax about 3-4 times longer than abdomen. Rostral rami strongly divergent. A1 nearly as long as cephalothorax, reaching or exceeding the posterior border of the genital segment. Exopodite 1 of A2 without setae, exopodite 2 with 3 setae. Endopodite 1 of Md with 2, endopodite 2 with 9 setae. Posterior corners of last thoracic segment divergent, their points go beyond the posterior border of the genital segment. Spermatheca is rounded. The external spine of exopodite 1 in P1 exceeds slightly the base of the following spine. Posterior surfaces of endopod of P2-P4 with minute spinules.

Male: Cephalothorax 3 times longer than the abdomen. Posterior corners of last thoracic segment exceed the posterior border of the first abdominal segment. P5 uniramous, left P5 long, 5-segmented, right P5 more than 3 times shorter and 3-segmented, the distal segment carries one terminal and one external spine

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Reproduction

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Broadcast-spawning species, eggs are clustered into distinct groups and attached to the substrate

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Size

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Female: 1,70-2,70 mm
Male: 1,50-2,20 mm

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Trophic Strategy

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Opprotunistic omnivores

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo