Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Phaennidae ( Famille )
            Xanthocalanus ( Genre )
Xanthocalanus quasiprofundus  Vyshkvartzeva, 2002   (F)
Vyshkvartzeva, 2002 (p.91, figs.F)
Espèce Xanthocalanus quasiprofundus - Planche 1 de figures morphologiquesIssued from : N.V. Vyshkvartzeva in Zoosyst. Rossica , St. Petersburg, 2002, 11. [p.92, Figs.1-8].
Female (from 85°54'6''N, 47°02'4''W): 1, forehead (lateral); 2, rostrum (ventral); 3, 5th thoracic segment with P5 and urosome (right side); 4, sema (ventral view); 5, A2; 6, Md (masticatory edge of gnathobase); 7, Md palp; 8, Mx1.

Nota: - Cephalosome and 1st pedigerous segment fused, 4th and 5th thoracic segments fused, but thin articulation sutures visible.
- Rostrum as a short plate with 2 long delicate filaments posteriad.- Urosome as long as 1/4 of prosome.
- Urosome in proportional length 39 : 21 : 18 : 9 : 10 = 100.
Urosomal segments 1-3 striated along posterior margin.
- Caudal rami as long as wide; inner margin with long setules; dorsal (S7) and ventral (S2) setae absent.
- Genital segment 1.3 times as long as wide, laterally without genital swelling, with a tuft of setules near genital opening (fig.3). Transverse genital opening and comparatively small operculum located just before midlength of genital segment. Spermatheca elongate; lateralm triangular skeletal plates well developed. Paired copulatory pores lie behind genital opening (fig.4).
- A1 24-segmented, reaching posterior margin of urosomal segment 1.
- A2 endopod about 0.75 times as long as exopod 6-segmented.exopodal segments 1-6 with 0, 1, 1, 1, 1, 0+3 setae, respectively.
- Md: gnathobase with 10 teeth and 1 slender dorsal spinulose seta; there are spinules of various sizes along bases of central teeth; 3 ventral teeth much higher than the rest, with multicusped crowns; 2 central teeth unicusped; 2 other central and 3 dorsal teeth bicusped; one tip of dorsalmost tooth remarkably elongate. Basis with 3 long inner setae; endopod as long as exopod; endopodal segment 1 with 2, endopodal segment 2 with 9 setae.
-Mx1: inner lobe 1 with 9 marginal, 4 posterior (S11-S14) and 1 anterior (S6) setae, length of marginal setae remarkably increase distally; inner lobe 2 with 2 long and 1 short setae; inner lobe 3 with 2 long and 2 shorter setae; inner lobe 4 with 3 long, 2 shorter and 1 small setae; endopodal segment 1 fused with basis, with 3 setae; endopodal segment 2 fused with the 1st, with 2 setae; 3rd endopodal segment with 4 setae; exopod with 10 and outer lobe 1 with 9 setae.

Espèce Xanthocalanus quasiprofundus - Planche 2 de figures morphologiquesIssued from : N.V. Vyshkvartzeva in Zoosyst. Rossica , St. Petersburg, 2002, 11. [p.93, Figs.9-16].
Female: 9, Mx2; 10, Mx2 distal endopodal complex; 11, Mxp; 12, P1; 13, P2; 14, P3; 15, P4; 16, P5.

Nota: - Mx2 compact; inner lobes 1-3 short, subequal; inner lobe 1 with 5 setae (4 long plumose and 1 shorter and thinner); inner lobe 2 with 2 long plumose and 1 shorter but more coarsely plumose setae; inner lobe 3 with 1 long, plumose seta, 1 short, coarsely plumose seta, and short, worm-like sensory seta; inner lobe 4 with 1 long plumose seta, 1 shorter and more coarsely plumose seta and 1 more strongly sclerotized long seta tapering distally, with long, strong, dense spinules; inner lobe 5 with 2 strong claw-like setae( 1 plumose and 1 with very strong spinules) and 2 worm-like setae, of which one is tapering and seems only partly transformed; endopod indistinctly 4-segmented; endopodal segments 1-3 each bearing 2 brush-like sensory setae; one brush-like seta on endopodal segment 3 much shorter and thicker, with apical brush formed of numerous long setules; endopodal segment 4 with 1 brush-like and 1 worm-like sensory seta (distal part of worm-like seta seems to be missing).
- Mxp syncoxa with 1 plumose seta and 2 worm-like setae proximally, the latter with setular rows along their length; with 1 seta and 1 brush-like sensory seta medially; with 3 plumose setae subterminally and patch of minute spinules terminally; basis slightly longer than syncoxa, bearing patch of minute spinules proximally and 3 plumose setae medially; endopod as long as 2/3 of basis, with 2+4, 4, 4, 3, 3+1 outer and 4 terminal setae, respectively; one of the setae on each endopodal segments 1-3 stout, spinulose, with scythe-shaped terminal part.
- P5 uniramous, 3-segmented; proximal segment on inner margin with row of small spinules proximally and short thickened spinules distally; 2nd segment twice as long as wide and slightly longer than distal segment, with patch of long lancet-like spinules along distal half of outer margin; distal segment 2.2 times as long as wide, its posterior surface with long spinules plus group of shorter spinules distally, terminally there are 4 serrate spines (2 apical, inner slightly longer than outer, one, the longest, inner, and one outer spine as long as 2/3 of inner and situated opposite to inner spine.

NZ: 1

Carte de distribution de Xanthocalanus quasiprofundus par zones géographiques
Arctic (Nansen Basin)
N: 1
(878) F: 7,6; {F: 7,60}
Rem.: ? Bathypélagique
Voir aussi les remarques en anglais
Dernière mise à jour : 12/03/2015

 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 21 mai 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