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Fiche d'espèce de Copépode |
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Calanoida ( Ordre ) |
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Clausocalanoidea ( Superfamille ) |
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Euchaetidae ( Famille ) |
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Paraeuchaeta ( Genre ) |
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Paraeuchaeta mexicana Park, 1995 (F) | |
| | | | | | | Syn.: | Euchaeta aequatorialis : Park, 1975 c (p.8, figs.F); ? Vervoort, 1963 b (p.172, figs.F,M) | | | | Ref.: | | | Park, 1994 (p.319); 1995 (p.44, Descr.F, figs.F, Rem;: p.45) |  issued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 1995, 29. [p.143, Fig.33]. Female: a, forehead (left side); b, urosome (left); c, d, genital somite (left, dorsal, respectively); e, Mx1 (first inner lobe separated), posterior; f, P1 (anterior); P2 (anterior). Nota: Similar in habitus to P. magaloba and P. aequatorialis but distinguishable from them by the following charateristics: Laterally, rostrum nearly triangular with wide base, straight anterior margin, and slightly curved posterior margin. Supralabrum relatively large. Genital somite relatively short, its dorsal wall with a low hump at middle. Ventral margin of genital flange somewhat concave and roughtly parallel to long axis somite. Posterior edge of genital field produced into a relatively large lobe. Anterior margin of genital prominence bulging; posterior margin about 2/3 length of posterior ventral wall of somite and they meet in a sharp curve. Dorsally, genital somite symmetrical. Cephalosomal appendages similar to those of P. magaloba except that outer lobe of Mx1 with 7 long setae plus a minute seta proximally.
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 issued from : W. Vervoort in Atlantide Report., 1963, 7. [p.172, Fig.18]. As Euchaeta aequatorialis. See in Remarks. Female (from Angola-Sierra-Leone): a, habitus (dorsal); b-c, posterior part cephalothoras and urosome (dorsal view and lateral view from right side, respectively); d, genital somite (ventral); e, forehead (lateral). (a: x20; b, c, e: x44; d: x88).
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 issued from : W. Vervoort in Atlantide Report., 1963, 7. [p.173, Fig.19]. As Euchaeta aequatorialisFemale: a-d, P1 to P4; e, part of the row of teeth along apical spine of exopodite P4; f, Mx1. (a-d: x55; e: x240; f: x125).
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 issued from : W. Vervoort in Atlantide Report., 1963, 7. [p.174, Fig.20]. As Euchaeta aequatorialis. Male (from Angola-Sierra-Leone): a-b, posterior part cephalothorax and urosome (dorsal and lateral view from right side); c, P1; d, P2; e, P5; f, extremity of exopodite of left P; (a, b; d, e: x55; c: x88; f: x135).
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 issued from : T. Park in Smiths. Contr. Zool., 1975, 196. [p.9, Fig.6]. As Euchaeta aequatorialis. Female (G. of Mexico): a, forehead (lateral); b-c, genital segment (lateral and ventral, respectively); d, outer lobe of Mx1; e, exopod of P2 (anterior). Nota: 3.04-3.24 mm in prosome length.
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 Paraeuchaeta mexicana Female: 1 - See key to species Groups and independent species of Paraeuchaeta (p.30): malayensis species Group. 2 - Outer spine of 2nd exopodal segment (or the 2nd of the first 2 exopodal segments forming a proximal, compound segment) of P1 normally developed (Fig.33-f). 3 - Outer lobe of Mx1 with 7 long setae in addition to 1 or 2 minute setae proximally (Fig.33-e). 4 - Genital somite without a conical process on left side close to anterior base of genital prominence (Fig.33-c). 5 - Dorsally and ventrally, genital somite symmetrical (Fig.33-d). 6 - Laterally, genital flange with normal posterior lobe (Fig.33-c). 7 - Laterally, genital somite with more or less smooth dorsal margin (Fig.33-c). 8 - Laterally, genital prominence with nearly straight or only slightly bulging posterior margin (Fig.33-c). 9 - Outer lobe of Mx1 with 7 long setae plus 1 or 2 very minute setae (Fig.33-e). 10 - Laterally, genital prominence with posterior margin equal to or shorter than half length of posterior ventral wall of somite (Fig.33-c). 11 - Laterally, posterior edge of genital field similar in shape and size to posterior lobe of genital flange (Fig.33-c).
| | | | | Ref. compl.: | | | Suarez-Morales & Gasca, 1998 a (p.109) (? non the localisation E Pacif.) | | | | NZ: | 2 + 1 douteuse | | |
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Carte de distribution de Paraeuchaeta mexicana par zones géographiques
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| | | | Loc: | | | G. of Mexico, ? G. of Guinea (in Vervoort, 1963 b), NE Pacif. (Hernandez-Trujillo & Esqueda-Escarcega, 2002).
Locality type: 23°45'N, 91°30'W. | | | | N: | 2 | | | | Lg.: | | | (19) F: 4,24-4,16; {F: 4,16-4,24} | | | | Rem.: | La discrimination entre cette espèce et P. aequatorialis nécessite un examen approfondi, en particulier du lobe externe de Mx1.
Hernandez-Trujillo & Esqueda-Escarcega, 2002 (in Appendix) ne confirment pas cette espèce dans le G. du Mexique, mais au Mexique W (Pacif. E). Un doute subsiste sur le bien-fondé de l'espèce nouvelle décrite par Park comme réellement différente de Paraeuchaeta aequatorialis.
Voir aussi les remarques en anglais | | | Dernière mise à jour : 27/01/2015 | |
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 Toute utilisation de ce site pour une publication sera mentionnée avec la référence suivante :
Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2024. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 21 novembre 2024] © copyright 2005-2024 Sorbonne Université, CNRS
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