Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Aetideidae ( Famille )
            Chiridius ( Genre )
Chiridius molestus  Tanaka, 1957   (F,M)
Syn.: Chiridius subgracilis Park, 1975 b (p.285, figs.F,M, Rem.); Bradford & Jillett, 1980 (p.23, figs.F,M, fig.73, distribution chart); Mazzocchi & al., 1995 (p.143, figs.F,M, Rem.);
? Chiridius gracilis : A. Scott, 1909 (p.42, figs.F);
Chiridius gracilis : Farran, 1929 (p.208, 229, fig.F); Bradford, 1970 a, figs.M)
Ref.:
Tanaka, 1957 a (p.53, Descr.M, figs.M); Tanaka & Omori, 1970 (p.118); Markhaseva, 1996 (p.113, Descr.F, figs.F,M); Vives & Shmeleva, 2007 (p.556, figs.M, Rem.)
Espèce Chiridius molestus - Planche 1 de figures morphologiquesissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.115, Fig.86].
Female (from different specimens and stations).


Espèce Chiridius molestus - Planche 2 de figures morphologiquesissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.116, Fig.87].
Male.


Espèce Chiridius molestus - Planche 3 de figures morphologiquesissued from : T. Park in Bull. Mar. Sci., 1975, 25 (2). [p.286, Fig.9]; As Chiridius subgracilis.
Female (from Gulf of Mexico): a, habitus (dorsal); b, c, posterior part of metasome and urosome (dorsal, lateral, respectively); d, exopod of P1; e, P2; f, lateral portion of third exopodal segment of P2 (anterior); g, P3; h, P4. P1-4: legs (anterior).


Espèce Chiridius molestus - Planche 4 de figures morphologiquesissued from : T. Park in Bull. Mar. Sci., 1975, 25 (2). [p.227, Fig.10]. As Chiridius subgracilis.
Male (from Gulf of Mexico): a, b, habitus (dorsal, lateral, respectively); c, forehead (lateral); d, distal part of Mxp; e, P1; f, P2; g, third exopodal segment of second leg (anterior); h, fifth pair of legs (posterior). P1-2: legs (anterior).


Espèce Chiridius molestus - Planche 5 de figures morphologiquesissued from : J.M. Bradford & J.B. Jillett in Mem. N.Z. Oceanogr. Inst., 86, 1980. [p.24, Fig.12]. As Chiridius subgracilis;
Female: A, habitus (dorsal); B, genital segment (lateral left side); C, P2; D, endopod of P2 (anterior surface).

Male: E, habitus (dorsal); F, last thoracic segment and 1st urosomal segment (lateral left side); G, P5.


Espèce Chiridius molestus - Planche 6 de figures morphologiquesissued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1970, 4 (4). [p.353, Figs 10-12]. As Chiridius gracilis.
Male (off Kaikoura, New Zealand): 10, forehead (ventral view); 11, P5; 12, urosome (dorsal).
Scale bars represent 0.1 mm.


Espèce Chiridius molestus - Planche 7 de figures morphologiquesIssued from: M.G. Mazzocchi, G. Zagami, A. Ianora, L. Guglielmo & J. Hure in Atlas of Marine Zooplankton Straits of Magellan. Copepods. L. Guglielmo & A. Ianora (Eds.), 1995. [p.144, Fig.3.24.1]. As Chiridius subgracilis.
Female: A, habitus (dorsal); B, P2; C, exopod 3 of P2.
Nota: Proportional lengths of urosomites and furca 39:23:17:8:13 = 100.

Male: D, habitus (dorsal); E, P5; F, last two distal segments of left P5.
Nota: Proportional lengths of urosomites and furca 18:26:22:20:2:12 = 100.


Espèce Chiridius molestus - Planche 8 de figures morphologiquesIssued from: M.G. Mazzocchi, G. Zagami, A. Ianora, L. Guglielmo & J. Hure in Atlas of Marine Zooplankton Straits of Magellan. Copepods. L. Guglielmo & A. Ianora (Eds.), 1995. [p.145, Fig.3.24.2]. As Chiridius subgracilis.
Female (SEM preparation): A, habitus (dorsal); B, urosome (dorsal); C, urosome (ventral); D, P2 and genital somite (ventral); E, exopod 3 of P2.
bars: A-D 0.100 mm; E 0.050 mm.


Espèce Chiridius molestus - Planche 9 de figures morphologiquesissued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., 1957, VI (1). [p.54, Fig.33].
Male: a, habitus (dorsal); b, forehead (lateral); c, last thoracic segment (lateral); d, P1; e, P2; f, P5.

Nota: Proportional lengths of urosomites and furca 17:25:23:19:3:13 = 100. A1 (23-segmented) reaches back to the middle of 3rd urosomal segment. Right A1 with segments 20 and 21 fused, 24 incompletely separate from the 25th, proximal segments furnished with well developed aesthetasks.


Espèce Chiridius molestus - Planche 10 de figures morphologiquesChiridius molestus female:
1 - Exopod of Mx1 with 8 setae. Points of last thoracic segment reaching the midlength of the genital segment, usually longer.
2 - Exopodal segment 3 of P2 (often also P3) with bulge near the base of 3rd external spine and excavation near the base of 2nd external spine. Endopodal segment 2 of Md usually with 8 setae.


Espèce Chiridius molestus - Planche 11 de figures morphologiquesChiridius molestus male:
1 - PPoints of last thoracic segment not longer than genital segment.
2 - Right P5 longer than left. Exopodal segments 1 and 2 of P1 with external spines reaching the midlength of the next segment or longer.
3 - Points of last thoracic segment hardly reaching the midlength of urosomal segment 1. Endopodal segment 1 of Mxp with 1 medial seta.

Ref. compl.:
Vives, 1982 (p.291); Suarez-Morales & Gasca, 1998 a (p.107); Lapernat, 2000 (tabl.3, 4); Razouls & al., 2000 (p.343, Appendix); Bradford-Grieve, 2003 (p.96, tab.1); Gaard & al., 2008 (p.59, Table 1, N Mid-Atlantic Ridge)
NZ: 7

Carte de distribution de Chiridius molestus par zones géographiques
Espèce Chiridius molestus - Carte de distribution 3
Carte de 1996
Espèce Chiridius molestus - Carte de distribution 4Issued from : J.M. Bradford & J.B. Jillett in New Zealand Ocean. Inst. Memoir, 86, 1980. [p.90-91, Fig.71].
Distribution of several species of Chiridius in the Tasman Sea and around New Zealand.
Nota: Chiridius subgracilis ( = Chiridius molestus).
Loc:
off Mauritania, off Azores, G. of Mexico, Indian, ? Indonesia-Malaysia, Japan (Sagami), Tasman Sea, New Zealand, SE North Island, Straits of Magellan (Pacific and Central area), sub-Antarct. (Pacif. SE).

Type locality: Izu region (Japan)
N: 11
Lg.:
(35) F: 2,4-2,3; (36) F: 2,72-2,35; M: 2,16-2; (37) F: 2,7-2,3; M: 2,04-1,8; (39) M: 2,04; (113) M: 2,13-2,02; (197) F: 2,32-2,12; M: 1,98-1,8; (201) F: 2,45-2,1; M: 2,1-2; (231) M: 2,03; 2; (313) M: 2; 2,03; {F: 2,10-2,72; M: 1,80-2,16}
Rem.: mésopélagique.
Sampling depth (sub-Antarct.) : 0-1000 m.
Voir aussi les remarques en anglais
Dernière mise à jour : 01/01/2015

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Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2020. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 02 décembre 2020]

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