Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Phaennidae ( Famille )
            Xanthocalanus ( Genre )
Xanthocalanus legatus  Tanaka, 1960   (F)
Ref.:
Tanaka, 1960 a (p.92, Descr.F, figsF); Bradford & al., 1983 (p.71)
Espèce Xanthocalanus legatus - Planche 1 de figures morphologiquesissued from : O. Tanaka in Publ. Sero Mar. Biol. Lab., 1960, VIII (1). [p.93, Fig.85].
Female (Suruga Bay, Japan): a, habitus (dorsal); b, forehead (lateral); c, last thoracic segment and urosome (lateral left side); d, rostrum (anterior view); e, Mx2; f, P1; g, P2; h, endopod of P3; i, endopod of P4; j, P5.

Nota: Head and 1st thoracic segment fused, 4th and 5th incompletely fused (line of demarcation faintly visible in dorsal view).
Cephalothorax 2.05 mm; abdomen 0.55 mm.
Lateral distal margin of the last thoracic segment produced triangularly into a sharp point.
Rostrum strong in the basal, part, to which 2 slender filaments attached.
The abdominal segments and furca in the proportional lengths 40 : 22 : 16 : 9 : 13 = 100.
Genital segment, in ndorsal view, inflated toward the distal end; genital area hollowed.
The first 3 abdominal segments fringed withn fine teeth on the distal margin.
Caudal rami oblique, about as long as wide.
A2 exopodite longer than the endopodite (33 : 24).
Mx1 with 9 setae on the outer lobe, 10 setae on the exopodite, 3+2+2 setae on the endopodite, 5 setae on the 2nd basal segment.
Mx2 feeble; endopodite with small bud-like sensory setae.
P5 3-segmented, these 3 segments of about equal width. 2nd 2 times as long as wide, with hair-like spines on the anterior distal margin, and svattered spinules near the posterior distal margin; 3rd segment with 2 apical and 2 marginal spines, and bearing a longitudinal row of short spines on the posterior surface; 1st segme,t with denticles on the inner margin.


Espèce Xanthocalanus legatus - Planche 2 de figures morphologiquesissued from : O. Tanaka in Publ. Sero Mar. Biol. Lab., 1960, VIII (1). [p. 93].
Female: Proportions of segments of A1.

Nota: A1 (24-jointed) reaches back to the distal end of the 2nd abdominal segment.

NZ: 1

Carte de distribution de Xanthocalanus legatus par zones géographiques
Loc:
Japan (Suruga Bay)
N: 1
Lg.:
(4) F: 2,6; {F: 2,60}
Rem.: For Tanaka (1960, p.94) the species is closely allied to X. pinguis. In the haul 0-1000 m.
Dernière mise à jour : 02/02/2015

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

Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2017. - Diversité et répartition géographique chez les Copépodes planctoniques marins. Disponible sur http://copepodes.obs-banyuls.fr 
[Accédé le 28 juin 2017]

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