Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Euchaetidae ( Famille )
            Paraeuchaeta ( Genre )
Paraeuchaeta megaloba  Park, 1995   (F,M)
Syn.: Euchaeta megaloba : Park, 1994 (p.322)
Park, 1995 (p.44, Descr.F,M, figs.F,M)
Espèce Paraeuchaeta megaloba - Planche 1 de figures morphologiquesissued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 1995, 29. [p.142, Fig.32].
Female: a, forehead (left side); b, urosome (left); c, genital somite (left); d, Mx1 (first inner lobe omitted), posterior; e, P1 (anterior); f, P2 (anterior).
Nota: Similar in habitus to P. scotti but in lateral view, rostrum relatively small, pointing nearly parallel to anterior dorsal margin of forehead.
Genital somite relatively long; its dorsal hump less conspicuous than in P. scotti ; ventral margin of genital flange more or less convex; posterior edge of genital field produced into a large lobe; posterior margin of genital prominence meeting posterior ventral wall of somite in a smooth curve.
dorsal hump of 2nd urosomal somite more pronounced than in P. scotti.
Cephalosomal appendages similar to thoes of P. scotti except that outer lobe of Mx1 with 6 long setae and a minute seta proximally.
In P1 exopod, outer spine of 1st segment relatively well developed; outer spine of 2nd segment extending beyond base of following outer spine by 1/4 its length.
In P2 exopod, outer spine of 2nd segment extending a little beyond base of following outer spine; 2nd outer spine of 3rd segment extending beyond base of 3rd by 1/6 its length; 1st outer spine of 3rd segment thick and about 1.5 times length of 3rd; posterior incision of marginal lobe bearing 2nd outer spine of 3rd segment reaching level of preceding incision.

Male: g, forehead (left); h, last pedigerous and genital somites (left); i, P1 (anterior); j, P2 (anterior); k, distal exopodal segments of left 5th leg (anterior, tilted clockwise); l, idem (anterior, tilted counterclockwise); m, idem (lateral, tilted clockwise).

Espèce Paraeuchaeta megaloba - Planche 2 de figures morphologiquesParaeuchaeta megaloba 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.32-e).
3 - Outer lobe of Mx1 with 6 long setae in addition to 1 or 2 minute setae proximally (Fig.32-d).
4 - Genital somite without a conical process on left side close to anterior base of genital prominence (Fig.32-c).
5 - Dorsally and ventrally, genital somite symmetrical.
6 - Laterally, genital flange with normal posterior lobe (Fig.32-c).
7 - Laterally, genital somite with more or less smooth dorsal margin (Fig.32-c).
8 - Laterally, genital prominence with nearly straight or only slightly bulging posterior margin (Fig.32-c).
9 - Outer lobe of Mx1 with 6 long setae plus 1 or 2 very small setae (Fig.32-d).
10 - In 3rd exopodal segment of P2, 2nd marginal lobe separated from segment by very deep cleft and has long outer spine (Fig.32-f).

NZ: 7

Carte de distribution de Paraeuchaeta megaloba par zones géographiques
NE Atlant. (off NW Cape Finisterre), Indonesia-Malaysia, S Japan, California, G. of California, S America, Pacif. (central S), Tasman Sea

Type locality: 13°47'S, 77°49'W.
N: 1
(3) F: 7,3-6,08; M: 5,83; {F: 6,08-7,30; M: 5,83}
Rem.: Park (1995, p.44) found this species widely in the Pacific: along the west coast of North and South America, including the Gulf of California, between 38°N and 35°S; in the central South Pacific at 39°S and 45°S; in the Tasman Sea; in the Banda Sea; off southern Japan; northeastern Atlantic between 17°W and 20°W and between 46°N and 49°N.
Dernière mise à jour : 27/01/2015

 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 15 août 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