Species Card of Copepod
Platycopioida ( Order )
    Platycopiidae ( Family )
        Platycopia ( Genus )
Platycopia tumida  (C.B. Wilson, 1935)   (F,M)
Syn.: Arenocalanus tumidus C.B. Wilson, 1935 (p.7: fig.F)
M.S. Wilson, 1946 (p.9, Redescr., figs.F,M); Ohtsuka & Boxshall, 1994 (p.166)
Species Platycopia tumida - Plate 1 of morphological figuresissued from : M.S. Wilson in Smithson. misc. Collns, 1946, 106 (9). [p.11, Fig.2].
Female (from mount Desert Island, Maine): A, A1; B, Mx1; C, Mx1 (proximal spine of masticatory lobe, enlarged); D, P1; E, P4; F, P5.
Nota: A1 22-segmented, 8 aesthetascs. Eye spot present, small. Endopod of P5 2-segmented, the whole bearing 6 spines.

Male: G, A1; H, endopod of P4; I, P5.
Nota: A1 15-segmented. Exopod of P5 3-segmented, distal segment of endopod with 5 spines.

Species Platycopia tumida - Plate 2 of morphological figuresissued from : M.S. Wilson in Smithson. misc. Collns, 1946, 106 (9). [p.7, Fig.1, H-I].
Female: H, P2; I, endopod of P3.

Species Platycopia tumida - Plate 3 of morphological figuresBoth A1 male nongeniculate.
Sexual dimorphism present in P5.
A2 exopod 6-segmented.
Exopod of Md indistinctly 3-segmented.
Mx2 not extremely modified.
Syncoxa of Mxp with 2 setae ......
P1 with 2-segmented exopod and 2-segmented endopod.
Exopod of P2 to P5 having inner setae; P2-P5 with outer spines on 1st exopod segment..... Platycopia...... 3 - 1st and 2nd exopod segments of P3 to P5 of female lacking inner setae or spines..... 4 - Endopod of P2 3-segmented.

NZ: 1

Distribution map of Platycopia tumida by geographical zones
Species Platycopia tumida - Distribution map 2
Chart of 1996
NW Atlant. (tidal pool at Sea Wall, Mount Desert Island, Maine)
N: 1
(604) F: ± 0,72; M < 0,72; {F: 0,72; M: 0,72}
Rem.: According to M.S. Wilson (1946) the species differs from its congeners in having an eye spot and sexually dimorphic P4.
Last update : 28/01/2015
    to add your remark

 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 July 19, 2024]

© copyright 2005-2024 Sorbonne University, CNRS

CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université


Version française
English version



On the WEB of CNRS


Marine Planktonic Copepods

Marine Planktonic Copepods


Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins