Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Diaptomoidea ( Superfamille )
        Pontellidae ( Famille )
            Ivellopsis ( Genre )
Ivellopsis elephas  (Brady, 1883)   (F,M)
Syn.: Pontella elephas Brady, 1883 (p.94, figs.F,M); Giesbrecht, 1892 (p.462, 774);
Pontellina (Ivellopsis) elephas : Claus,1893;
Pontella surrecta C.B. Wilson, 1950 (p.301, figs.M, no F);
Pontella valida : C.B. Wilson, 1950 (p.301, figs.F,M);
Pontella forficula M : A. Scott, 1909 (p.162, figs.M); Mulyadi, 2000 (p.187, fig.7); Othman & Toda, 2006 (p.315, fig.19)
Giesbrecht & Schmeil, 1898 (p.139, Rem. F,M); Wickstead & Krishnaswamy, 1964 (p.27, Redescr.F,M, figs.F,M); Sherman, 1967 (p.23, Rem.); Silas & Pillai, 1976 (p.852, Rem.); Ohtsuka & al., 1987 (p.564, 568, Rem.); Mulyadi, 2011 (p.1529, figs.F,M, Rem.: synonymies)
Espèce Ivellopsis elephas - Planche 1 de figures morphologiquesissued from : C.B. Wilson in Bull. U.S. natn Mus., 1950, 100, 14 (4). [Pl.29, Figs.428, 430].
As Pontella surrecta.
Male (from Nasugbu Bay, Philippines): 428, habitus (dorsal); 430, P5.

Espèce Ivellopsis elephas - Planche 2 de figures morphologiquesissued from : C.B. Wilson in Bull. U.S. natn Mus., 1950, 100, 14 (4). [Pl.29, Figs.432-443.
As Pontella valida.
Female (from Philippines): 432, habitus (dorsal); 433, posterior prosome and urosome (dorsal); 435, forehead (lateral); 436, rostrum (frontal view); 437, Md; 438, Mx1 (posterior surface); 439, Mx1 (anterior surface; 440, P5.

Male: 434, habitus (dorsal); 441, left P5; 442, terminal detail of left P5; 443, right P5.

Espèce Ivellopsis elephas - Planche 3 de figures morphologiquesIssued from : G.S. Brady in Rep. Scient. Results Voy. Challenger, Zool., 1883, 8 (23). [Pl. XXXVIII, Figs.7-14]. As Pontella elephas.
Female: 8, A1; 12, P5; 14, Urosome.

Male: 7, habitus (dorsal); 9, right A1; 10-11, teeth of denticulated plate on A1 (more highly magnified); 13, P5.

Espèce Ivellopsis elephas - Planche 4 de figures morphologiquesIssued from : Mulyadi in Crustaceana, 2011, 84 (12-13). [p.1530, Fig.10];
Female (from Pari Island, Jakarta Bay): a, habitus (dorsal); b, metasomal segment 5 and urosome (dorsal); c, rostrum (anterior view); d, A1; e, P4; f, P5.

Espèce Ivellopsis elephas - Planche 5 de figures morphologiquesIssued from : Mulyadi in Crustaceana, 2011, 84 (12-13). [p.1531, Fig.11];
Male (from Pari Island, Jakarta Bay): a, habitus (dorsal); b, metasomal segment 5 and urosome (dorsal); c, rostrum (anterior view); d, right A1; e, geniculate region; f, P5.

Espèce Ivellopsis elephas - Planche 6 de figures morphologiquesIssued from : Mulyadi in The Raffles Bull. Zool., 2000, 48 (2). [p.187, Fig.7]. As Pontella forficula
Male (from Jakarta Bay): a, habitus (dorsal); b, 5th metasomal somite and urosome (dorsal); c, rostrum (anterior); d, right A1; e, segment 18 of right A1; f, P5.

Espèce Ivellopsis elephas - Planche 7 de figures morphologiquesissued from : B.H.R. Othman & T. Toda in Coastal Mar. Sc., 2006, 30 (1). [p.315, Fig.19]. As Pontella forficula.
Male (from Sister's Island, Singapore): A, habitus (dorsal); B, posterior part of prosome and urosome (dorsal); C, P5.

Nota: Prosome to yrosome length ratio 3.35 : 1.
- Postero-lateral end of thorax rounded, somewhat symmetrical.
- Lateral cephalic hooks prominent.
- Urosome 5-segmented, naked.
- Caudal rami asymmetrical, right ramus longer.
- P5 asymmetrical; right leg, thumb of exopodal segment 1 prominent,3 long and spiniform, curved inwards distally with 1 long seta on base, without process on middle segment, exopodal segment 2 long and curved almost at right angle midway near the distal end with 1 apical and 2 unequal margibal spines; left leg with short coxa, basis with 1 long plumose seta, exopodal segment 1 with 1 spine at distal end, exopodal segment 2 curved and slender, bifurcate at apex, inner margin hirsute.

Espèce Ivellopsis elephas - Planche 8 de figures morphologiquesissued from : N. Phukham in Species diversity of calanoid copepods in Thai waters, Andaman Sea (Master of Science, Univ. Bangkok). 2008. [p.171, Fig.45]. As Pontella forficula.
Male (from W Malay Peninsula): a, habitus (dorsal); b, last thoracic segments and urosome (dorsal); c, P5.

Espèce Ivellopsis elephas - Planche 9 de figures morphologiquesissued from : A. Scott in Siboga - Expeditie XXIX a. ,The Copepoda of the Siboga Expedition. Part. I., 1909. [Pl. LIII]. As Pontella forficula nov. sp..
Male (from 4°59'N, 119°49'E): 1, habitus (dorsal); 2, rostrum (anterior view); 3, left A1; 4, right A1; 5, right A1 (proximal marginal plate); 6, endopodite of P1; 7, P5.

Nota: No trace of a lens in the basal part of the rostrum.
- Cephalic segment fusrnished with side hooks, and a pair of dorsal eye lenses.
- Last thoracic segment symmetrical, postero-lateral angles rounded, and the ends only slightly produced.
- Urosome 5-segmented; the combined length of the abdomen and caudal rami contained almost 3 times in the total length of the cephalothorax, from the frontal margin to the base of the genital segment.
- Caudal rami nearly symmetrical.
- Left A1 19-segmented, and extends to the end of the 2nd thoracic segment.
- The middle segments of the right A1 much inflated; they are fusnished with 3 very strong and forked processes, the proximal hinge segment has a large saucer-like process with blunt teeth, the distal hinge is short, the upper margin is furnished with 2 simple plate.
- Endopodite of P1 with 3 segments.; P2, P3 and P4 as in Pontella structure.
Right P5 with claw-like segment long and curved, furnished with 1 apical and 3 marginal spines.
The distal segment of the exopodite of left P5 without apical spines, the outer margin furnished with 3 small spines.

NZ: 3

Carte de distribution de Ivellopsis elephas par zones géographiques
China Seas (south East China Sea), Philippines (Sibago Island), Sulu Sea, Jakarta Bay, Pai Island, Singapore, Indian
N: 7
(5) M: 3,1; (136) F: 3,4-2,95; M: 3,05-2,7; (137) F: 3,2; M: 3; (1126) F: 2,97-3,0; M: 2,58-2,61; {F: 2,95-3,40; M: 2,58-3,10}
Rem.: Associé aux frondes de Sargassum .
Voir aussi les remarques en anglais
Dernière mise à jour : 13/02/2017

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Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2024. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur [Accédé le 18 juillet 2024]

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