Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Phaennidae ( Famille )
            Cornucalanus ( Genre )
Cornucalanus indicus  Sewell, 1929   (F,M)
Sewell, 1929 (p.179, Descr.F, figs.F); 1948 (p.540); Brodsky, 1950 (1967) (p.236, figs.F, Rem.); Vervoort, 1957 (p.93, Rem.); Tanaka, 1960 a (p.122, figs. juv.F); Tanaka & Omori, 1967 (p.250); Arashkevich, 1969 (p.702, figs.F); Silas, 1972 (p.647); Brodsky & Zvereva, 1976 (p.188, Descr.M, figs.M); Tanaka & Omori, 1992 (p.258, Rem.F,M, figs.M); Chihara & Murano, 1997 (p.853, Pl.139: F); Vives & Shmeleva, 2007 (p.685, figs.F,M, Rem.)
Espèce Cornucalanus indicus - Planche 1 de figures morphologiquesissued from : O. Tanaka & M. Omori in Publ. Sero Mar. Biol. Lab., 1992, 35 (4/5). [p.259, Fig.3].
Male (from Izu region): a, forehead (lateral); b, last thoracic segments and urosome (lateral left side); c, urosome ((dorsal); d, rostrum (frontal view); e, A2; f, Md (mandibular palp); g, Md (cutting edge); h, Mx1; i, Mx2; j, Mxp; k, P1 (posterior); l, P2; m, P5; n, distal part of right P5; o, distal part of left P5.

Rostrum consist of a plate with stout rami, each of which is followed by a small projection at apex.
A1 extends to end of first urosomal segment.
Mx1 reduced: 7 setae on outer lobe; 9 on exopod, 5 on basis, 3+6 on endopod, and 4 on 3rd and 2 on 2nd inner lobe; first inner lobe large but only armed with few small setae.
Mx2 reduced: 4th and 5th lobes each armed with a large claw-like spiniform seta; endopod with 8 weak sensory filaments of which one is slender and longer than others.
Prosome/Urosome lengths ratio 77 : 23.
Cephalosome and 1st metasomal segment separated, 4th and 5th incompletely separated by a line of demarcation. Urosomal segments without spinules and caudal rami in the proportional lengths 16 : 33 : 26 : 15 : 4 : 6 = 100.
P5, the right leg 3-segmented; distal segment armed with 2 spines; left leg 5-segmented and long; 1st to 4th segments about equal in length; 5th segment short, and with 1 distal and 1 lateral spine and patches of hairs.

Espèce Cornucalanus indicus - Planche 2 de figures morphologiquesissued from : O. Tanaka & M. Omori in Publ. Sero Mar. Biol. Lab., 1992, 35 (4/5). [p.257, Fig.2].
Female (from Izu region): d, urosome and caudal rami (dorsal); e, idem (lateral left side); f, Mx1; g, h, P5.

Nota: Prosome/urosome length ratio 74 : 26.
Forehead round with no trace of cephalic spine.
Urosome covered with spinules. Proportional lengths of segments and caudal rami 50 : 25 : 15 : 2 : 8 = 100.
Lateral margin of genital complex inflated; genital tubercle prominent.
Mx1: 9 setae on outer lobe, 10 on exiopod, 5 on basis, 10 on endopod, 4 on 3rd, 2 on 2nd and 10 on 1st inner lobe.
P5 very small, 3-segmented; 2nd segment longer than the 3rd; there is a faint line of demarcation near the proximal 1/3 of 3rd segment; 3rd segment armed with a large inner terminal spine and small outer spine (although the inner terminal spine not developed well in another specimen).

Espèce Cornucalanus indicus - Planche 3 de figures morphologiquesIssued from : K.A. Brodskii in Calanoida of the Far Eastern Seas and Polar Basin of the USSR. Opred. Fauna SSSR, 1950, 35 (Israel Program for Scientific Translations, Jerusalem, 1967) [p.237, Fig.148].
Female (from NW Pacif.): habitus (dorsal and lateral right side); Mp1, Mx2; Mp2, Mxp; S1, P1; S3, P3; S5, P5.
Nota: P5 slightly asymmetrical in size and form.
A specimen from the Pacific shows the following differences in comparison with those described from the Bay of Bengal: Head less rounded, spines of Mxp larger. The Pacific form possibly represents a separate variety.

Espèce Cornucalanus indicus - Planche 4 de figures morphologiquesissued from : R.B.S. Sewell in Mem. Indian Mus., 1929, X. [p.180, Fig.66].
Female (from off SE Sri-Lanka): a, posterior thoracic margin and urosome (lateral left side); b, anal segment and furcal ramus (lateral): c, Mx2; d, Mxp; e, P2; f, P4; g, P5.

Espèce Cornucalanus indicus - Planche 5 de figures morphologiquesissued from : O. Tanaka & M. Omori in Publ. Sero Mar. Biol. Lab., 1992, 35 (4/5). [p. 260].
Male: Proportional lengths of segments of A1.

Ref. compl.:
Grice & Hulsemann, 1967 (p.16); Roe, 1972 (p.277, tabl.1, tabl.2); Vives, 1982 (p.292); Lozano Soldevilla & al., 1988 (p.58); Suarez-Morales & Gasca, 1998 a (p.110); Ikeda & al., 2006 (p.1791,Table 2); Galbraith, 2009 (pers. comm.); Homma & Yamaguchi, 2010 (p.965, Table 2); Homma & al., 2011 (p.29, Table 2, 3, abundance, feeding pattern: suspension feeders)
NZ: 6

Carte de distribution de Cornucalanus indicus par zones géographiques
Canary Is., off Morocco-Mauritania, G. of Mexico, Indian (off E Sri Lanka), Japan (Izu region, NE), Okhotsk Sea, Bering Sea, S Aleutian Basin, S Aleutian Is., off British Columbia (rare),
N: 7
(29) F: 8; (70) F: 9-8,2; (22) F: 9,24-8,8; (199) F: 7,37; (444) M: 7,65-7,3; (867) F: 8,9-9; M: 8,28; {F: 7,37-9,24; M: 7,30-8,28}
Rem.: méso-abyssopélagique.
Voir aussi les remarques en anglais
Dernière mise à jour : 02/01/2015

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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 09 décembre 2022]

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