Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Euchirella ( Genus )
Euchirella orientalis  Sewell, 1929   (F,M)
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
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
(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
    to add your remark

 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed May 25, 2024]

© copyright 2005-2024 Sorbonne University, CNRS

CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université


Version française
English version



On the WEB of CNRS


Marine Planktonic Copepods

Marine Planktonic Copepods


Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins