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Marine Planktonic Copepods
Bradyidius rakuma  Zvereva, 1977   (F)
Taxonomy
Order Calanoida
Superfamily Clausocalanoidea
Family Aetideidae

Synonymy

Aetideopsis rakuma Zvereva, 1977 (p.6, Descr.F, figs.F)

References

Othman & Greenwood, 1987 (p.1137, Rem.); Markhaseva, 1996 (p.79, figs.F)

Figures

Plate 1 issued from : E.L. Markhaseva in Trudy Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.80, Fig.57].
Female (from Zvereva, 1977 & unpublished). Re: exopod; Gn: genital segment (ventral and lateral): Ce: forehead (lateral and dorsall); R: rostrum (anterior).

Nota: Cephalothorax nearly 4 times longer than urosome.
A1 slightly longer than cephalothorax.
Endopodal segment 1 of Md with 2 setae, segment 2 with 9 terminal setae.
Posterior surface of Mx1 with 4 setae, endopod with 15 setae.
Plate 2 issued from : E.L. Markhaseva in Trudy Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.81, Fig.58].
Female (holotype).
Plate 3 issued from : J.A. Zvereva in Issled. Fauny Moreï, 1977, 20 (28). [p.7, Fig.1]. As Aetideopsis rakuma.
Female (from Okhatsk Sea): 1, habitus (right lateral side); 2, forehead; 2', rostrum (frontal view); 3, A2; 4, mandibular palp; 5, cutting blade of Md; 6, Mx1; 7, Mx2; 8, Mxp; 9, thoracic segments and urosome (dorsal); 10, genital somite (left lateral side); 11, P1; 12, P2; 13, P3; P4 (exopod incomplete).
Plate 4 issued from : J.A. Zvereva in Issled. Fauny Moreï, 1977, 20 (28). [p.8]. As Aetideopsis rakuma.
Female: genital field, showing muscles articulating the plate above the genital opening (ventral).
Plate 5 Bradyidius rakuma female:
1 - Rostrum with divergent rami.
2 - Points of last thoracic segment just reaching posterior border of genital segment. Exopodal segment 2 of A2 with 2 setae. Exopodal segment 1 of P1 with external spine almost reaching the base of external spine of segment 2.
3 - Posterior corners of last thoracic segment divergent.

Complementary References

Markhaseva, 1998 (p.250, Fig.2); Bradford-Grieve, 2003 (p.102, tab.3)

Distribution

NZ: 1

Distribution map of Bradyidius rakuma by geographical zones


Localisations

Okhotsk Sea.

Type locality: Tobuty Bay (Aniva Gulf).

Quotations

N: 2

Dimensions (mm)

(219) F: 3,3-3,1; {F: 3,10-3,30}

Remarks

hyperbenthic (on sandy bottom, depths of 60 m).
Last update : 30/12/2014

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