Species Card of Copepod
Monstrilloida ( Order )
    Monstrillidae ( Family )
        Cymbasoma ( Genus )
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)
Species Cymbasoma boxshalli - Plate 1 of morphological figuresissued 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.

Species Cymbasoma boxshalli - Plate 2 of morphological figuresissued 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.

Species Cymbasoma boxshalli - Plate 3 of morphological figuresissued from : E. Suarez Morales in Crustaceana, 1993, 64 (1). [p87]. As Thaumaleus boxshalli.
Female: Formula of armature of swimming legs 1 to 4.

Species Cymbasoma boxshalli - Plate 4 of morphological figuresIssued 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.

Species Cymbasoma boxshalli - Plate 5 of morphological figuresIssued 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).

Species Cymbasoma boxshalli - Plate 6 of morphological figuresIssued 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)

Species Cymbasoma boxshalli - Plate 7 of morphological figuresIssued 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).

Species Cymbasoma boxshalli - Plate 8 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 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.

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

Distribution map of Cymbasoma boxshalli by geographical zones
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.
Last update : 28/04/2015
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[Accessed October 09, 2015]

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