Species Card of Copepod
Monstrilloida ( Order )
    Monstrillidae ( Family )
        Cymbasoma ( Genus )
Cymbasoma frondipes  (Isaac, 1975)   (F)
Syn.: Thaumaleus thomsoni : T. Scott, 1904 (p.248, Descr.F, figs.F);
Thaumaleus frondipes Isacc, 1975 (p.3, 8, figs.F)
Suarez-Morales & Morales-Ramirez, 2003 (p.210: Table 2, p.212: Rem.)
Species Cymbasoma frondipes - Plate 1 of morphological figuresIssued from : T. Scott in Ann. Rep. Fish. Bd Scotland, 1904, 22 (Part III), IV. [Pl. XIV, Fig.1]. As Thaumaleus thomsoni.
Female (from off Scarborough, Scotland); 1, habitus (dorsal).

Nota : Cephalothorax about equal to twice the entire length of the remaining segments of the thorax and abdomen combined.

Species Cymbasoma frondipes - Plate 2 of morphological figuresIssued from : T. Scott in Ann. Rep. Fish. Bd Scotland, 1904, 22 (Part III), IV. [Pl. XIV, Figs.2-4]. As Thaumaleus thomsoni.
Female: 2, A1; 3, P5; 4, abdomen and caudal rami.

Nota : A1 shoprt and stout, appear to consist of 4 segments, but the 3rd, which is small, seems to be partly coalescent with the 2nd.
P5 moderately large, foliaceous, and abruptly wider at the distal extremity, the result of a lobe-like process on the inner distal aspect ; each foot carries 3 apical setae, the innermost of which is considerably shorter than the other two.
Abdomen 2-segmented ; 1st segment fully half as long as the last segment of the thorax, and large rand more dilated than the 2nd segment.
Caudal rami short, carry 3 moderately elongated setae.

Species Cymbasoma frondipes - Plate 3 of morphological figuresIssued from : E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2003, 116 (1). [p.210, Table 2].
Selected taxonomic features in Cymbasoma frondipes.
GDS = anterior half genital double-somite globose; IS = inner seta of P5 smallest; IS <50% = inner seta <50% as long as others; L = longest seta on P5; OP on CT = position of oral papilla on cephalothorax; AI/CT = relative length (as a percent) of A1 to cephalothorax; = relative length (as a percent) of position of oral papilla anteriorly on cephalothorax; T = transverse striations on ''neck'' area.
Compare with species of Cymbasoma with uniramous P5 armed with 3 setae: C. concepcionae, C. reticulatum, C. bowmani, C. quintanarooense, C. boxshalli, C. bali, C. striatum, C. claparedi, C. tumorifrons.

Compl. Ref.:
Grygier, 1995 a (p.45, 64)
NZ: 1

Distribution map of Cymbasoma frondipes by geographical zones
E Scotland
N: 1
(727) F: 4,8; {F: 4,80}
Rem.: This form is considered as a synonym of Thaumaleus thompsoni Giesbrecht,1892, although Isaac (1975) considers this species valid.
Last update : 28/04/2015
    to add your remark

 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2015. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en 
[Accessed November 26, 2015]

© copyright 2005-2015 CNRS, UPMC

CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
UPMC - Paris Universitas


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