Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Pontellidae ( Family )
            Ivellopsis ( Genus )
Ivellopsis denticauda  (A. Scott, 1909)   (F,M)
Syn.: Pontella denticauda A. Scott, 1909 (p.161, figs.F,M); Sewell, 1932 (p.376); Voronina, 1962 a (p.68, 71, fig.2); Silas & Pillai, 1973 (1976) (p.828, figs.M, Rem.M); Pillai, 1975 (p.135, figs.M, Rem.); Chihara & Murano, 1997 (p.869, Pl.153,156: F,M); Mulyadi, 2000 (p.185, figs.F); Mulyadi, 2002 (p.90, figs.F, Rem.);
Ref. compl.: Sewell, 1948 (p.324); C.B. Wilson, 1950 (p.292); Sherman, 1964 (p.481); Heinrich, 1969 (p.1461, fig.5); Guangshan & Honglin, 1984 (p.118, tab.); Madhupratap & Haridas, 1986 (p.105, tab.1); Heinrich, 1988 (p.89, fig.2); Ohtsuka & al., 2008 (p.115, Table 5);
Mulyadi, 2011 (p.1533, Rem.: p.1533)
Species Ivellopsis denticauda - Plate 1 of morphological figuresissued from : A. Scott in Siboga-Expedition, 1909, XIX a. [Plate LII, Figs.1-12]. As Pontella denticauda.
Female (from E Indonesia waters): 1, habitus (dorsal); 2, rostrum with trace of lens on the basal part; 3, A1; 4, endopodite of P2; 5, P5.

Male: 6, habitus (dorsal); 7, rostrum; 8, left A1; 9, right A1; 10, endopodite of P1; 11, left P5; 12, right P5.

Species Ivellopsis denticauda - Plate 2 of morphological figuresissued from : E.G. Silas & P.P. Pillai in J. mar. biol. Ass. India, 1973 (1976), 15 (2). [p.829, Fig.23, j-l]. As Pontella denticauda.
Male (from Andaman Islands): j, habitus (lateral left side); k, right A1 (distal part); l, P5.
Scale as in Calanopia minor.

Species Ivellopsis denticauda - Plate 3 of morphological figuresissued from : Mulyadi in Treubia, 2002, 32; [p.91, Fig.29]. As Pontella denticauda.
Female (from Jakarta Bay): a, habitus (dorsal); b, forehead (lateral); c-d, metasomal somite 5 and urosome (dorsal and lateral, respectively); e, P4; f, P5.

Nota: Caudal ramus asymmetrical, left ramus broader than right.
- Urosome 2-segmented.
- 5th metasomal somite symmetrical, narrowly rounded.
- Right side of urosomite 1 produced into 2 rounded processes.

Species Ivellopsis denticauda - Plate 4 of morphological figuresissued from : P.P. Pillai in J. mar. biol. Ass. India, 1975, 17 (2). [p.134, Fig.2, c-d]. As Pontella denticauda.
Male (from Indian Ocean): c, A1; d, P5.
Scale: Single bar: 0.3 mm; double bars: 0.05 mm.

NZ: 4

Distribution map of Ivellopsis denticauda by geographical zones
Species Ivellopsis denticauda - Distribution map 2issued from : A.K. Heinrich in Zool. Zh., 1969, 48 (10) [p.1461, Fig.5].
Distribution of two species of Pontellidae in the Pacific Ocean.
1: Pontellopsis villosa; 2:Pontella denticauda [= Ivellopsis denticauda]; 3: stations.
E Indian, Andaman Sea, Indonesia (Jakarta Bay, S Java, Sulu Sea, Celebes Sea, Timor Sea), China Seas (South China Sea), Philippines (W Mindanao), Pacif. (W equatorial), New Hebrides, Fiji Is., Tonga Is., Pacif. tropical (W & E)

Type locality: eastern Indonesia)
N: 13
(5) F: 3,3; M: 2,9; (44) F: 3,093; M: 2,674; (256) M: 3,26; (866) F: 2,86-3,3; M: 2,71-2,9; (900) F: 2,91-2,95; (1115) M: 3,07; {F: 2,86-3,30; M: 2,67-3,26}
Rem.: Neritic; epipelagic.
This species belongs to "P. fera"-Group (See in P. fera in Mulyadi, 2003, Table I).
After Mulyadi (2011, p.1533) this species must be included in the genus Ivellopsis Claus, 1893, because In the female the posterolateral ends of 5th thoracic segment produced into rounded lobes ; the genital double somite with a lateral p^rocess ; the caudal rami assymmetrical (right ramus longer than the left) ; exopodite of P5 with 3 outer setae and with an acuminate endopodite.
In the male : The posterolateral ends of the 5th thoracic segment produced into rounded lobes ; Rostrum with a double convex lens ; the caudal rami asymmetrical (right ramus slightly longer than the left ) ; exopodal segment 2 of left P5 curved and slender, bifurcate at apex, and inner margine hirsute.
Last update : 13/02/2017
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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 June 12, 2021]

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