Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Phaennidae ( Family )
            Onchocalanus ( Genus )
Onchocalanus scotti  Vervoort, 1950   (F)
Vervoort, 1950 a (p.31, Descr.F, figs.F); 1965 (p.33, Rem.)
Species Onchocalanus scotti - Plate 1 of morphological figuresIssued from : W. Vervoort in Zool. Verh., Leiden, 1950, 10. [p.32, Fig.15].
Female (from Moluccan Sea): a, posterior part of cephalothorax and urosome (lateral right side); b, rostrum (ventral aspect); c, left P5 (posterior); d, right Mx2; e, posterior part of cephalothorax and urosome (dorsal); f, cephalon (lateral).

Nota: head and 1st thoracic segment imperfectly fused, 4th and 5th imperfectly fused; line of demarcation visible on the sides. No trace of a crest or carina on the dorsal surface of the head. The abdominal segments and furca in the proportional lengths 47:16:19:4:14 = 100. Caudal slope of genital tubercle haired. caudal margins of the first three urosomal segments with a row of leaf like spinules, ventral surface of the 2nd urosomal segment with some scattered hairs. Anal segment completely telescoped into 3rd. A1 (24-segmented) reaches as far as the caudal border of the 2nd urosomal segment. Mx1: 1st inner lobe with 8 + 4 bristles, 2nd inner lobe with 2, 3rd with 4 setae; 2nd basal segment with 5 setae; endopod with 3, 3 and 4 setae.

NZ: 2

Distribution map of Onchocalanus scotti by geographical zones
Species Onchocalanus scotti - Distribution map 2
Chart of 1996
Gulf of Guinea (off Ghana), Indonesia-Malaysia (Molucca Sea, Celebe Sea)
N: 2
(16) F: 4,7-4,55; (64) F: 5,15-4,25; {F: 4,25-5,15}
Rem.: meso & bathypelagic.
The surprising distribution of this form is well confirmed by its descriptor (Vervoort, 1963 b, p.33, from off Ghana).
Last update : 27/01/2015
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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 05, 2023]

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Marine Planktonic Copepods

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