Fiche d'espèce de Copépode
Monstrilloida ( Ordre )
    Monstrillidae ( Famille )
        Cymbasoma ( Genre )
Cymbasoma boxshalli  (Suarez Morales, 1993)   (F)
Syn.: Thaumaleus boxshalli Suarez Morales, 1993 (p.85, Descr.F, figs.F); Grygier, 1995 a (p.57, 61)
Suarez-Morales, 2001 (p.244, Redescr.F, figs.F, Rem.); 2002 (p.95: tab.1); 2011 (p.9); Suarez-Morales & Morales-Ramirez, 2003 (p.210: Table 2)
Espèce Cymbasoma boxshalli - Planche 1 de figures morphologiquesissued from : E. Suarez Morales in Crustaceana, 1993, 64 (1). [p86, Fig.1]. As Thaumaleus boxshalli.
Female (from Bahia de Ascension, Yucatan): a-b, habitus (lateral and dorsal, respectively).
Scale bar in mm.
Nota: head and 1st pedigerous segment fused, about 0.60 of total body length. Oral papilla located 0.15 of way back along cephalothorax. Eyes present, well developed, ocelli intensely pigmented, semitriangular in dorsal view. Urosome consisting of the 5th pedigerous somite, the genital somite, and 1 free abdominal somite. Absence of a dorsal suture on the genital somite.

Espèce Cymbasoma boxshalli - Planche 2 de figures morphologiquesissued from : E. Suarez Morales in Crustaceana, 1993, 64 (1). [p87, Fig.2]. As Thaumaleus boxshalli.
Female: c, right A1; d, P5; e, anal segment and caudal rami (dorsal).
Scale bar in mm.
Nota: A1 4-segmented; ratio of lengths of segments: 12.5: 27.5:1307:46.3 = 100. P5 fused medially. Absence of an inner ramus in P5 (only a small inner protuberance with a 1 short, plumose seta. Caudal rami 1.65 times longer than wide, each ramus bearing 3 setae.

Espèce Cymbasoma boxshalli - Planche 3 de figures morphologiquesissued from : E. Suarez Morales in Crustaceana, 1993, 64 (1). [p87]. As Thaumaleus boxshalli.
Female: Formula of armature of swimming legs 1 to 4.

Espèce Cymbasoma boxshalli - Planche 4 de figures morphologiquesIssued from : Suarez-Morales in Mitt. Mus. Nat.kd. Berl., Zool. Reihe, 2002, 78. [p.95, Table 1].
Comparison of main taxonomic features in species of Cymbasoma with a cephalothorax relative length equal or over 60%, females only: C. boxshalli (Suarez-Morales, 1993).
Mouth position way back anterior part of forehead in percentage of the cephalothorax length.
Compare with C. bowmani, C. californiense, C. longispinosum, C. morii, C. nicolettae, C. quintanarooense, C. striatus,C. thompsoni, C. tumorifrons, C. sp. (from Brazil), C. chelemense.

Espèce Cymbasoma boxshalli - Planche 5 de figures morphologiquesIssued from : E. Suarez-Morales in Cah. Biol. Mar., 2001, 42. [p.245, Figs.1-6].
Female (from 12°11'N, 69°00'W): 1-2, habitus (dorsal and lateral, respectively); 3, left A1 (dorsal); 4, right A1 (dorsal); 5, urosome (dorsal); 6, last urosomite and caudal rami (ventral);
Cuticular ornamentation: circular whorls (w); nipple-like processes (n); transverse ridges (tr).

Espèce Cymbasoma boxshalli - Planche 6 de figures morphologiquesIssued from : E. Suarez-Morales in Cah. Biol. Mar., 2001, 42. [p.246, Figs.7-12].
Female: 7, P1 (posterior); 8, P2 (anterior); 9, P3 (posterior); 10, P4 (anterior); 11, 5th pedigerous somite and genital double-somite (ventral); 12, 4th and 5th pedigerous somites and genital double-somite (lateral), ovigeous spines cut short.
Coxae omitted in P1-P4.

P5 fused medially at base, with low, medial, subtriangular protuberance between them (fig.11); uniramous, endopod absent; exopodal lobe elongate, 2.5-2.6 times longer than wide. Exopodal lobe armed with 2 biserially plumose setae, subequal in length and breadth, plus a small, inner seta (broken at base)

Espèce Cymbasoma boxshalli - Planche 7 de figures morphologiquesIssued from : E. Suarez-Morales in Cah. Biol. Mar., 2001, 42. [p.247].
Female: Armature of swimming legs P1 to P4.

Nota: Basis with lateral hair-like seta; this seta on P3 sparsely and biserially setulated, at least 2.5 times longer and noticeably thicker than the others. Exopodal outer apical seta with outer row of short spinules, inner margin sparsely setulated; this seta increasing in size from P1 through P4, relatively longer in P4 (2.3 times exopodal length), shorter in P2 (1.5 times).

Espèce Cymbasoma boxshalli - Planche 8 de figures morphologiquesIssued from : E. Suarez-Morales & A. Morales-Ramirez in Proc. Biol. Soc. Washington, 2003, 116 (1). [p.210, Table 2].
Selected taxonomic features in Cymbasoma boxshalli.
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. bali, C. frondipes, C. striatum, C. claparedi, C. tumorifrons.

Ref. compl.:
Suarez-Morales & Gasca, 1998 a (p.112)
NZ: 1

Carte de distribution de Cymbasoma boxshalli par zones géographiques
Mexico (Yucatan: Bahia de la Ascension), Curaçao (Slangenbaai reef).
N: 2
(725) F: 2,1; (854*) F: 1,8 [without furca]; {F: 2,10}
Rem.: Inshore.
Cf Table 2 from Lian & Tan (2019) in C. cheni.
Dernière mise à jour : 16/07/2019

 Toute utilisation de ce site pour une publication sera mentionnée avec la référence suivante :

Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2022. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur [Accédé le 20 mai 2022]

© copyright 2005-2022 Sorbonne Université, CNRS

Mentions légales et informations nominatives
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université


Version française
English version



Sur le WEB du CNRS


Copépodes planctoniques marins

Copépodes planctoniques marins


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