Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Pontellidae ( Family )
            Labidocera ( Genus )
Labidocera gangetica  Sewell, 1934   (F,M)
Syn.: Labidocera euchaeta Dimorph 1 Sewell, 1912 (p.339, figs.F,M); C.B. Wilson, 1950 (part., p.244); L. euchaeta major Sewell, 1932 (p.361); 1933 (p.28, Rem.); Silas, 1972 (p.649)
Sewell, 1934 (p.79, Rem.); Silas, 1972 (p.549)
Species Labidocera gangetica - Plate 1 of morphological figuresIssued from : R.B.S. Sewell in Rec. Indian Mus., 1912, 7. [Pl.XVIII, Figs.1-9]. As Labidocera euchaeta stage 1.
Female (from Bay of Bengal): 1, habitus (dorsal); 2, A1; 3, P1; 4, Mxp; 5, P5.
Nota: Head and 1st thoracic segmentseparate, sbdivided into 2 regions by a deep groove, 4th and 5th fused, the posterior thoracic border produced backwards in an angular process. Forehead forms a prominent bulge terminating below in a pair of long retrorse rostral spines; there is no rostral lens but a ventral lens is present. Side hooks absent. Abdomen 2-segmented, the 2th is very short. Caudal rami symmetrical, setae of practically equal length. A1 21-segmented (segments 7-8 fused, 10-11 partially fused) reach nearly to the end of the abdomen.; the distal part of segment 2 and segments 3 to 14 fringed posteriorly with long hair. Mxp armed with a row of fine teeth down the margin of the 2nd basal segment. All exopodal segments fringed with fine hair.

Male: 6, habitus (lateral left side); 7, A1; 8, right P5; 9, left P5.
Nota: Rostrum as the female, without lenses, a well-developed ventral lens present. Abdomen 5-segmented, 5th very small. Caudal rami symmetrical. Proportional lengths urosomites and caudal rami as 5:6:6:4:1:6. Right A1 with the 17th segment bearing a prominent crest, which terminates distally in a sharp point, 18th segment armed with a toothed-plate, the teeth are lancet shaped and are larger in the centre, the 19th-21th segments bear a toothed plate, which extends nearly the whole length of the segment, and the 22nd segment is produced distally in a sharp process which extends nearly the whole length of the succeeding segment. Right P5 forms a grasping organ; left P5 has a short terminal segment, which bears a spine on its external margin and has and has 3 terminal processes, its inner border is thickly fringed with hair; the peultimate segment bears a terminal spine at its distal external angle.

Species Labidocera gangetica - Plate 2 of morphological figuresissued from : C.B. Wilson in Bull. U.S. natn. Mus., 1950, 100, 14 (4). [Pl. 25, Figs.364, 364']; As Labidocera euchaeta.
Female (from Pacific): 364', P5.

Male: 364, right P5.

Compl. Ref.:
Sewell, 1948 (p.324); Silas & Pillai, 1973 (1976 ) (p.814); Madhupratap & Haridas, 1986 (p.105, tab.1)
NZ: 1

Distribution map of Labidocera gangetica by geographical zones
N Indian, Nancowrie Harbour, Malaysia (Kurau River)
N: 3
(44) F: 2,94-2,52; (81) F: 2,64; M: 2,43; {F: 2,52-2,94; M: 2,43}
Rem.: Neritic.
Last update : 06/01/2015
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 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., 2005-2023. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed June 06, 2023]

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Marine Planktonic Copepods

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