Fiche d'espèce de Copépode
Monstrilloida ( Ordre )
    Monstrillidae ( Famille )
        Cymbasoma ( Genre )
Cymbasoma chelemense  Suarez-Morales & Escamilla, 1997   (F,M)
Ref.:
Suarez-Morales & Escamilla, 1997 (p.539, figs.F,M); Suarez-Morales & Palomares-Garcia, 1999 (p.197, tab.1); Suarez-Morales & Escamilla, 2001 (p.1444, Rem.); Suarez-Morales, 2011 (p.10); Üstün & al., 2014 (p.1402, 1407 Table I)
Espèce Cymbasoma chelemense - Planche 1 de figures morphologiquesissued from : E. Suarez-Morales & J.B. Escamilla in Bull. Mar. Sc., 1997, 61 (3). [p.540, Fig.1].
Female (from Laguna de Chelem, Yucatan): A-B, habitus (dorsal and lateral, respectively); C, ovigerous spines.
Scales in mm.
Nota: Cephalothorax almost 68 % of total body length. Oral papilla located less than 20 % of way back along ventral surface of cephalothorax. Ocelli present, pigment cups medially conjointed, well developed, intensely pigmented only in central portion, round in dorsal view. Cephalic segment with cuticular protuberances on forehead, forming intricate ridges and grooves; 2 large sensilla on lateral portions of same area. Genital complex with ovigerous spines, joined at the base, almost 14 % longer than total body length, and about 10 times longer than urosome


Espèce Cymbasoma chelemense - Planche 2 de figures morphologiquesissued from : E. Suarez-Morales & J.B. Escamilla in Bull. Mar. Sc., 1997, 61 (3). [p.542, Fig.2].
Female: A-B, head (dorsal and ventral, respectively); C, left A1 (dorsal); D, right A1 (dorsal).
Scales in mm.
A1 4-segmented, less than 15 % of total body length, and 21 % as long as cephalothorax; distal antennular segment with 3 suequal branched setae aligned near outer distal end; length ratio of antennular segments 10.3:25.4:13.3:51 = 100.


Espèce Cymbasoma chelemense - Planche 3 de figures morphologiquesissued from : E. Suarez-Morales & J.B. Escamilla in Bull. Mar. Sc., 1997, 61 (3). [p.543, Fig.3].
Female: A, urosome (dorsal); B, P5 (anterior view); C, P1; D, P2.
Scales in mm.
Nota: P5 unsegmented, consisting of 2 lobes; the inner (endopodal) lobe unarmed; exopodal lobe with 3 setae, the two borne on outer and distal margins suequal in length and breadth, the third seta on inner margin; all setae biserially plumose; small, rounded, unarmed protuberance present on distal outer margin of outer lobe, near insertion of outermost seta. Urosome consisting of 3 segments (5th pedigerous somite, genital double-somite and 1 free somite). Caudal rami nearly quadrate, approximately 1.2 times longer than wide, bearing 3 well developed terminal setae with almost the same length and breadth.


Espèce Cymbasoma chelemense - Planche 4 de figures morphologiquesissued from : E. Suarez-Morales & J.B. Escamilla inBull. Mar. Sc., 1997, 61 (3). [p.544, Fig.4].
Male: A-B, habitus (dorsal and lateral, respectively); C, right A1 (ventral); D, left A1 (ventral); E, genital lappets (anterior view).
Scales in mm.
Nota: Cephalothorax almost 50 % of total body length. Oral papilla not prominent, located less than 20 % of way back along ventral surface of cephalothorax. Ocelli present, pigment cups conjointed medially, rounded in dorsal view as in female but poorly pigmented. A1 5-segmented, more than 30 % of total body length; length ratio of antennular segments 10:19.4:16.2:26.3:28.1 = 100. P5 absent. Caudal rami approximately 1.25 times longer than wide, bearing 4 well developed setae subequal in length and breadth.


Espèce Cymbasoma chelemense - Planche 5 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. chelemense Suarez-Morales & Escamilla, 1997.
Mouth position way back anterior part of forehead in percentage of the cephalothorax length.
Compare with C. bowmani, C. boxshalli, C. longispinosum, C. morii, C. nicolettae, C. quintanarooense, C. striatus, C. thompsoni, C. tumorifrons, C. sp. (from Brazil).


Espèce Cymbasoma chelemense - Planche 6 de figures morphologiquesIssued from : F. Üstün, T. Terbiyik Kurt & E. Suarez-Morales in Crustaceana, 2014, 87 (11-12). [p.1403, Table I].
Taxonomic features and morphometry of females of Cymbasoma chelemense.


Espèce Cymbasoma chelemense - Planche 7 de figures morphologiquesIssued from : F. Üstün, T. Terbiyik Kurt & E. Suarez-Morales in Crustaceana, 2014, 87 (11-12). [p.1404, Table I (continued)].
Taxonomic features and morphometry of females of Cymbasoma chelemense.

Ref. compl.:
Suarez-Morales & Gasca, 1998 a (p.112); 2002 (p.95: tab.1)
NZ: 1

Carte de distribution de Cymbasoma chelemense par zones géographiques
Loc:
Mexico ( N Yucatan: Laguna de Chelem)
N: 2
Lg.:
(282) F: 2,3; M: 1,08; (862)* F: 3; {F: 2,30-3,00; M: 1,08}
* caudal rami excluded.
Rem.: Types: Sampling depth: 0,9- 1,2 m; (S = 32.9 p.1000; t = 27.5 *C; pH = 8.2).
For Suarez-Morales and Escamilla (1997, p.545) his species seems to be very closely related to C. longispinosum (Bourne, 1890).
For Üstün & al. (2014, p.1402) this form belongs to Cymbasoma longispinosum species-group.
Dernière mise à jour : 08/10/2015

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Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2021. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 02 décembre 2021]

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