Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Diaptomoidea ( Superfamille )
        Centropagidae ( Famille )
            Centropages ( Genre )
Centropages alcocki  Sewell, 1912   (F,M)
Sewell, 1912 (p.338, figs.F,M); Kasturirangan, 1963 (p.32, figs.M); Vervoort, 1964 b (p.309); Saraswathy, 1966 (1967) (p.78, figs.F, Rem.); Wellershaus, 1970 (p.464, figs.F,M); Silas, 1972 (p.648); Connell, 1981 (p.497, Rem.); Ohtsuka & Nishida, 2017 (p.575, Rem.)
Espèce Centropages alcocki - Planche 1 de figures morphologiquesissued from : Sewell R.B.S. in Rec. Indian Mus., 1912, 7. [Plate XVII, Figs.1-7].
Male (from Bay of bengal): 1, habitus (lateral view); 2, A1; 3, P1; 4, P2; 5, P5 (right side); 6, P5 (left side).
Nota: Head and 1st thoracic segment separate, 4th and 5th separate. Grasping of right A1 has the knee-joint between the 18th and 19th segments; 10th, 11th and 12th segments all bear a curved spine-like process on the anterior surface, 17th segment bears a toothed-plate which is somewhat longer than the segment itself and is prolonged over the proximal part of the 18th segment; 19 th segment bears teeth the whole length of the segment and is then produced as a spinous process beyond the distal extremity.

Female: 7, P5.
Nota: Head and 1st thoracic segment separate, 4th and 5th separate; the posterior border of the last segment is rounded and near the ventral border presents a short backwardly directed spinous process. Rostrum small and bifid. Abdomen 3-segmented, symmetrical; Proportional lengths of urosomites and furca as 35:23:20:15; the 1st segment bears on each side a clump of small needle-shaped spines. A1 (24-segmented) do not reach to the end of the thorax; there are no spines on any of the proximal segments.

Espèce Centropages alcocki - Planche 2 de figures morphologiquesissued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1970, 12. [p. 465, Figs. 1-13].
Male (from Cochin Backwater, S. India): 3, habitus (lateral view, right side); 5, idem (dorsal view); 10, P5 (posterior aspect); 14, right A1 (segments 19-21, ventral aspect); 15, right A1 (dorsal aspect).

Female: 1, habitus (lateral, right side); 2, Md (mandibular palp); 4, Md (masticatory edge); 6, Mxp; 7, thoracic segment 5 and urosome (lateral, left side); 8, distal part of thoracic segment 5 and genital complex (lateral, right side); 9, A2; 11, P1- P4 (posterior aspect); 12, right P5 (posterior aspect; left leg is alike).

Copepodit V female: 13, right P5 (posterior aspect; left leg is alike).
Scale : single line = 0.1 mm ; double line = 0.05 mm.

Espèce Centropages alcocki - Planche 3 de figures morphologiquesissued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1970, 12. [p.468, Figs. 14-16].
Male: 14, right A1 (segments 19-21; ventral aspect); 15, right A1 (with details, not all setae drawn; dorsal aspect).

Female: 16, right A1.

Espèce Centropages alcocki - Planche 4 de figures morphologiquesissued from : M. Saraswathy in Proc. Symp. Crustacea.- Symp. Ser. mar. biol. Ass. India, 1966, 2 (1). [p.82, Fig.1 (1-2)].
Female (from Trivandrum coast, SW India): 1, P5; 2, ultimate segment of A2.
Nota: Sewell figures the inner spines on the 2nd exopod segment of female P5 without any spines. But in the present specimens there are 2 rows of minute teeth. The ultimate segment of A1 is provided with a thick spine-like process and a few setae (as in C. trispinosus), but this is not shown in Sewell's illustration.

Ref. compl.:
Sewell, 1932 (p.228); 1948 (p.323); Patel, 1975 (p.659); Madhupratap & Haridas, 1986 (p.105, tab.1); Madhupratap & al., 1996 (p.866); Ramaiah & al., 1996 (p.3); Achuthankutty & al., 1998 (p.1, Table 2, seasonal abundance vs monsoon); Madhu & al., 2007 (p.54, Table 4, abundance vs monsoon); Fernandes, 2008 (p.465, Tabl.2)
NZ: 1

Carte de distribution de Centropages alcocki par zones géographiques
India, Goa, Saurashtra coast, Burhabalanga estuary, Kerala, Rangoon (estuairy), Gulf of Oman, Arabian Sea, Bay of Bengal
N: 11 (N Indian : 11)
(81) F: 1,2; M: 1,1; (334) F: 1,4-1,1; M: 1,2-1; (349) F: 1,35-1,16; M: 1,1-1,05; (530) F: 1,1; M: 1; {F: 1,10-1,40; M: 1,00-1,20}
Rem.: Saumâtre. Proche de C. natalensis.
Voir aussi les remarques en anglais
Dernière mise à jour : 11/05/2019

 Toute utilisation de ce site pour une publication sera mentionnée avec la référence suivante :

Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2022. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur [Accédé le 02 décembre 2022]

© copyright 2005-2022 Sorbonne Université, CNRS

Mentions légales et informations nominatives
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université


Version française
English version



Sur le WEB du CNRS


Copépodes planctoniques marins

Copépodes planctoniques marins


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