Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Aetideidae ( Famille )
            Aetideus ( Genre )
Aetideus divergens  Bradford, 1971   (F,M)
Syn.: Aetideus armatus : Campbell, 1929 (p.311); ? A. armatus : Tanaka, 1957 a (p.31, figs.F,M)
Ref.:
Bradford, 1971 (p.24,figs.F,M); Gardner & Szabo, 1982 (p.200, figs.F, M); Markhaseva, 1996 (p.17, figs.F,M, Rem.)
Espèce Aetideus divergens - Planche 1 de figures morphologiquesissued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1971, 5 (1). [p.25, Fig.9]; From off British Columbia: 52°02'N, 132°53'W).
Female: a, habitus (dorsal); b, idem (lateral right side); c, genital segment and posterior thoracic points (lateral right side); d, e, rostrum (from two specimens).
Nota: Seminal receptacle with a moderately long thick tube, about 4 times as long as wide, connecting the dorsal and ventral sacs. Mouth parts and swimming legs identical with those of A. armatus

Male: f, habitus (ventral); g, idem (lateral right side); h, P5.
Nota: Rostrum absent. All appendages as in A. australis.


Espèce Aetideus divergens - Planche 2 de figures morphologiquesissued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., 1957, VI (1). [p.32, Fig.23]. As Aetideus armatus.
Female (from Sagami Bay, Japan): a, habitus (dorsal); b, forehead (lateral); c, last thoracic segment and urosome (lateral left side); d, rostrum; e, P1 (right leg is of abnormal structure); f, P2.
Nota: Rostrum with a knob at the middle of the base. Proportional lengths of urosomites and furca 35:16:14:12:23 = 100. A1 (23-segmented) extends to distal end of furca. Mx1 has 9 setae on outer lobe, 11 setae on exopod, 6+3+4 setae on endopod, 5 setae on 2nd basal segment. Terminal spine of exopod of P2 has 17 teeth.

Male (from Sagami Bay, Japan): g, forehead (lateral); h, last thoracic segment and urosome (lateral left side); i, P5.
Nota: Rostrum reduced, represented by only a small knob. Proportional lengths of urosomites and furca 16:23:23:21:2:15 = 100. Anal segment almost concealed beneath the preceding. A1 reaches back to middle of third urosomal segment. End-spine of P2 has 26 teeth.


Espèce Aetideus divergens - Planche 3 de figures morphologiquesissued from : E.L. Markhaseva in Trudy Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.18, Fig.6].
Female (from 29°17'N, 142°47'E) & Male from Bradford (1971)


Espèce Aetideus divergens - Planche 4 de figures morphologiquesissued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1971, 5 (1). [p.18, Fig.4, b]. [modified C.R]
Rostrum width : depth plotted against rostrum depth (c) for Aetideus divergens. SA: South Africa.
Compare with A. australis, A. truncatus, A. armatus and A. pseudarmatus.


Espèce Aetideus divergens - Planche 5 de figures morphologiquesAetideus divergens female:
1 - Posterior corners not prolonged into wing-like lobes; points of last thoracic segment not reaching the middle of urosomal segment 2. Anterior part of cephalon without crest.
2 - Right P1 basipodite with an external tooth-like projection distally. Coxopodite of P4 without spinules near the base of internal seta.
3 - Posterior corners of last thoracic segment divergent, always exceeding posterior border of genital segment. Rostral excavation 0.8-1.2 times as wide as deep.


Espèce Aetideus divergens - Planche 6 de figures morphologiquesAetideus divergensMale:
1 - Last thoracic segment with points.
2 - Points of posterior last thoracic segment exceeding posterior border of urosomal segment 1 (in dorsal view).
3 - Caudal rami 2.35-2.55 times as long as wide. 2nd segment of P5 less than 4 times as long as wide.

Ref. compl.:
Robertson & Frost, 1977 (p.231, feeding); Mackas & Anderson, 1986 (p.115, Table 2); Shih & Marhue, 1991 (tab.2, 3); Mauchline, 1998 (tab.20, 21); Rebstock, 2002 (p.71, Table 3, Fig.5, climatic variability); Humphrey, 2008 (p.83: Appendix A); Galbraith, 2009 (pers. comm.); DiBacco & al., 2012 (p.483, Table S1, ballast water transport); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, pers. comm.)
NZ: 1 + 1 douteuse

Carte de distribution de Aetideus divergens par zones géographiques
Espèce Aetideus divergens - Carte de distribution 2issued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1971, 5 (1). [p.35, Fig.14].

North Pacific Ocean showing distribution of four Aetideus species.
Loc:
NE Pacif. (off British Columbia), British Columbia, Fjord system (Alice Arm & Hastings Arm), Portland Inlet, Puget Sound (near Seattle), CalCOFI refion, ? Japan (Sagami, Suruga, Izu-Bonin trench.

Type locality: 52°02'N, 132°53'W.
N: 9
Lg.:
(37) F: 1,9-1,69; M: 1,43-1,25; ? (39) F: 1,82; M: 1,8; {F: 1,69-1,90; M: 1,25-1,43}
Rem.: épi-mesopélagique.
Voir aussi les remarques en anglais
Dernière mise à jour : 27/12/2014

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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 11 avril 2021]

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