Species Card of Copepod
Cyclopoida ( Order )
    Oncaeidae ( Family )
        Oncaea ( Genus )
Oncaea heronae  Malt, 1982   (F)
Malt, 1982 (p.188, 193, Descr.F, figs.F)
Species Oncaea heronae - Plate 1 of morphological figuresIssued from : S.J. Malt in Bull. Br. Mus. nat. Hist. (Zool), 1982, 42 (3). [p.201, Fig.7].
Female (from 20°N, 21°W): a, habitus (dorsal); b, urosome (dorsal); c, A1; d, A2; e, Mx1; f, Mx2; g, Mxp; h, P1; i, P2; j, P3; k, P4.

Nota: Ratio of prosome and urosome lengths 1.5 : 1.
- 3rd prosomal segment without a dorsal projection.
- Proportional lengths of urosomal segments and caudal rami 9 : 50 : 7 : 7 : 13 : 14.
- Genital apparatus located on dorsal surface anterior to midpoint of genital sefment.
- Caudal rami twice as long as wide.
- A1 6-segmented ; ratio of segment lengths 12 : 22 : 34 : 13 : 7 : 12.
- A2 3-segmented ; 1st segment bearing 1 long pinnate seta distally ; 2 nd segment unarmed ; terminal segment equal to 2 nd segment in length, bearing 1 curved spine and 3 curved setae proximally and 5 curved spines and 1 curved seta distally.
- Internal surface of 2 nd segment of Mxp bearing 2 overlapping rows of setules and 2 spines ; larger distal spine bilaterally dentate ; terminal claw with smooth concave surface ; single internal basal spine.

Species Oncaea heronae - Plate 2 of morphological figuresIssued from : S.J. Malt in Bull. Br. Mus. nat. Hist. (Zool), 1982, 42 (3). [p.189].
Female: Armature of the swimming legs P1 to P4.


Bilaterally serrate spines on external margins of exopodites lack pronounced flanges ; 1st endopodite with conical terminal projection ; all terminal spines shorter than terminal segments except terminal spines of 4th exopodite and endopodite, these being longer than terminal segments.
- P5 comprising small free cylindrical segment bearing 2 terminal setae, the longer, internal seta extending to level of genital apertures.

NZ: 1

Distribution map of Oncaea heronae by geographical zones
off NE Cape Verde Is.

Locality type: 20° N, 21° W.
N: 1
(680) F: 0,35-0,31; {F: 0,31-0,35}
Rem.: abyssopelagic. 3980-3960 m (NE Cape Verde Is.)
Last update : 22/12/2016
    to add or edit your remark
By Ruth Böttger-Schnack 2010-02-27 17:31:23    ( Citation of this remark )
According to Heron & Bradfod-Grieve (1995, p. 14) the taxonomic status of this species is uncertain (see my note in the species site of Oncaea heronae in the WoRMS database)

 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., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed May 19, 2024]

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Marine Planktonic Copepods

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