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
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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2019. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed June 26, 2019]

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Marine Planktonic Copepods

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