Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Euchirella ( Genus )
Euchirella orientalis  Sewell, 1929   (F,M)
Ref.:
Sewell, 1929 (p.115, figs.F, no M]); Sewell, 1947 (p.76, figs.F,M); Vervoort, 1963 b (p.134, Rem.); Silas, 1972 (p.646); Vaupel Klein, 1972 (p.502, 505); 1980 (p.152); 1984 a (p.49, Rem.: (F) poorly described by Sewell)
Species Euchirella orientalis - Plate 1 of morphological figuresissued from : R.B.S. Sewell in The John Murray Expedition, 1933-34, Scientific Reports, VIII (1), 1947. [p.78, Fig.15, B-H].
Female (from Arabian Sea): C, Urosome (lateral right side); D, Mxp; F, P4.
Nota: Proportional lengths of cephalothorax and abdomen as 80 to 20. The proportional lengths of the various segments of the body (cephalon to caudal rami) as 360:181:87:82:102:26:23:23:34= 1000. No frontal crest. Head and 1 st thoracic segment only partially fused

Male: B, forehead (lateral); E, P1; G, P5; H, terminal claw of left P5.
Nota: The proportional lengths of the various segments of the body (cephalon to caudal rami) as 470:81:81:97:75:56:53:47:6:31= 1000. Forehead with a crest, that very closely resembles that of E. messinensis Giesbrecht, but is not so elevated. Head and 1st pediger segment completely fused. Anal segment completely telescoped into the 4th segment. Right A1 19-segmented, left 20-segmented.


Species Euchirella orientalis - Plate 2 of morphological figuresissued from : R.B.S. Sewell in Mem. Indian Mus., 1929, X. [p.117, Fig.44, a-c].
Female (from off SE Sri Lanka): a, P1; b, P2; c, basal part of P4.


Species Euchirella orientalis - Plate 3 of morphological figuresIssued from : J.C. von Vaupel-Klein in Zool. Meded., Leiden, 19972, 47 (41). [p.509, Fig.4, a-b].
Female: endopodite of right P1 (anterior view); a, specimen from Celebes Sea); b, specimen from Mariannes Islands).

Nota: 'organ of Vaupel Klein' (see explanation to Euchirella curticauda.)

Compl. Ref.:
Sewell, 1948 (p.329, 529, 534, 539, 540, 541, 542); Guangshan & Honglin, 1984 (p.118, tab.); Shih & Young, 1995 (p.67)
NZ: 5

Distribution map of Euchirella orientalis by geographical zones
Loc:
Indian (G. of Aden, Arabian Sea, Maldive Is., off E Sri Lanka), Indo-Malaysia, China Seas (East China Sea, South China Sea) , Japan (Izu), NW Pacif., Mariana Is., Pacif. (W equatorial)
N: 9
Lg.:
(11) F: 4,4-4,33; M: 4,77; (29) F: 4,8; (242) F: 6,25-4,35; {F: 4,33-6,25; M: 4,77}
Rem.: species doubtful.
Last update : 22/01/2021
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed May 12, 2021]

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