Fiche d'espèce de Copépode
Cyclopoida ( Ordre )
    Corycaeidae ( Famille )
        Corycaeus ( Genre )
            Ditrichocorycaeus ( Sous-Genre )
Corycaeus (Ditrichocorycaeus) subtilis  M. Dahl, 1912   (F,M)
Syn.: Ditrichocorycaeus subtilis : Boxshall & Halsey, 2004 (p.494); McKinnon & al., 2008 (p.843: Tab.1); Vives & Shmeleva, 2010 (p.220, figs.F,M, Rem.); Wi & al., 2013 (p.430, figs.F,M, Rem.)
Ref.:
M. Dahl, 1912 (p.80, figs.F,M); Früchtl, 1924 b (p.101); Sewell, 1933 (p.30); Farran, 1936 a (p.138); Tanaka, 1957 (p.88, figs.F); 1960 (p.82, figs.F,M); Chen & al., 1974 (p.59, figs.F); Boxshall & Halsey, 2004 (p.494)
Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 1 de figures morphologiquesissued from : O. Tanaka in J. Fac. Agricult. Kyushu Univ., 1957, 11 (1). [Pl.7, Figs.1-4].
Female (from Japanese waters): 1, habitus (lateral right side); 2, urosome (dorsal); 3, A2; 4, apical spine of exopod of P2.
Nota: The abdominal segments and furca in the proportional lengths 44:26:30. Wing-like expansions of 3rd thoracic segment not extending to the middle of genital segment. Processes of posterior corners of 4th thoracic segment very small.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 2 de figures morphologiquesissued from : Q.-c Chen & S.-z. Zhang & C.-s. Zhu in Studia Marina Sinica, 1974, 9. [Pl.18, Figs.8-12].
Female (from China Seas): 8, habitus (dorsal); 9, idem (lateral left side); 10, A2; 11, terminal spines of exopod of P2; 12, P4.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 3 de figures morphologiquesissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.VIII, Figs.8a, 9, 10].
Female: 8a, habitus (dorsal); 9, urosome (dorsal); 10, habitus (lateral left side).


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 4 de figures morphologiquesissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.VIII, Fig.13].
Female: 13, A2.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 5 de figures morphologiquesissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.VIII, Figs.14, 16].
Female: 14, P2 (distal part ofexopod 3); 16, P4.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 6 de figures morphologiquesissued from : M. Dahl in Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. Bd II, G. f1. I. Die Corycaeinen 1912. [Taf.VIII, Figs.11, 12, 15].
Male: 11, habitus (dorsal); 12, idem (latral right side); 15, A2.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 7 de figures morphologiques[B & H] Female: Small species. Caudal ramus just longer than anal somite. Ventral hook of genital double-somite weak; produced ventral margin of genital double-somite almost rectangular in lateral view.
Male: Genital somite only as long as anal somite and caudal rami combined.

[V & S] Female: Posterior points of thoracic segment 3, in dorsal view, scarcely reacing half genital segment. Spine of basipodite 2 of A2 less than half of spine of basipodite 1.
Male: Posterior points of thoracic segment 3, in dorsal view, shorter than 2/3 genital segment. Genital segment length scarcely shorter than caudal rami. Genital segment 1.5 times longer than caudal rami.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 8 de figures morphologiquesIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [Pl. XXXVI, 1-3].
Female (from 35°09'S, 20°13'E): 1, last thoracic segments and abdomen (lateral).
Nota : Cephalothorax and abdomen in the proportional lengths 69 to 31.
Head separates from the 1st thoracic segment, but the line of demarcation is very feeble.w
Wing-like expansion of the 3rd thoracic segment extends only to the level of the proximal 1/5 of the genital segment.
4th thoracic segment ends into short pointed processes.
Abdominal segments and caudal rami in the proportional lengths 45 : 27 : 28 = 100.
Proximal part of the genital segment dilated, without ventral hook.
Anal segment 1.4 times as long as it is broad at the anterior border.
Caudal rami slightly divergent, 3/5 times as long as it is broad at the proximal

Male (from 35°09'S, 20°13'E): 2, habitus (dorsal); 3, last thoracic segments and abdomen (lateral).
Cephalothorax and abdomen in the proportional lengths 60 to 40.
Abdominal segments and caudal rami in the proportional lengths 47 : 23 : 30 = 100.
Genital segment elongate ovate, 1.8 times as long as it is broad at the middle section.
Anal segment about 1.9 times as long as it is broad at the posterior border.
Caudal rami about 4/3 times as long as it is broad at the proximal.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 9 de figures morphologiquesIssued from : J.H. Wi, D.H. Kim & H.Y. Soh Ocean Sci. J., 2013, 48 (4). [p.432, Fig.8]. As Ditrichocorycaeus subtilis.
Female (from off W jeju): A-B, habitus (dorsal and lateral, respectively); C, A2; D, Mx1; E, Mxp.
Scale bars in µm.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 10 de figures morphologiquesIssued from : J.H. Wi, D.H. Kim & H.Y. Soh Ocean Sci. J., 2013, 48 (4). [p.434, Fig.9]. As Ditrichocorycaeus subtilis.
Female: A, P1; B, P2; C, P3; D, P4.
Qxale bar in µm.


Espèce Corycaeus (Ditrichocorycaeus) subtilis - Planche 11 de figures morphologiquesIssued from : J.H. Wi, D.H. Kim & H.Y. Soh Ocean Sci. J., 2013, 48 (4). [p.435, Fig.10]. As Ditrichocorycaeus subtilisi.
Male : A, habitus (dorsal); B, genital somite (lateral); C, A2; D, Mxp; E, exopod of P1; F, exopod of P2; G, exopod of P3; H, P4.

Ref. compl.:
Sewell, 1948 (p.420); C.B. Wilson, 1950 (p.196); De Decker, 1964 (p.15, 21, 27); Kovalev & Shmeleva, 1982 (p.86); Greze & al., 1985 (p.8); Othman & al., 1990 (p.561, 564, Table 1); Kimmerer, 1993 (tab.2); Shih & Young, 1995 (p.76); Noda & al., 1998 (p.55, Table 3, occurrence); Hsieh & Chiu, 1998 (tab.2); Hsieh & al., 2004 (p.398, tab.1); Rezai & al., 2004 (p.490, tab.2); Lo & al., 2004 (p.89, tab.1); McKinnon & al., 2008 (p.848: Tab. IV); Johan & al., 2012 (p.647, Table 1, fig.2, salinity range)
NZ: 9

Carte de distribution de Corycaeus (Ditrichocorycaeus) subtilis par zones géographiques
Loc:
South Africa (SE), Medit. (Alboran Sea), Zanzibar, Madagascar (Nosy Bé), Malaysia (Kurau Riv.), Perai River estuary (Penang), Straits of Malacca, Aru Is., Bismarck Archipelago, China Seas (East China Sea, South China Sea), Taiwan, Mienhua Canyon, S Korea (off W jeju Is.), S Japan (Kuchinoerabu Is.), Japan (very rare), Hawaii, California (Tomales Bay), Australia (Great Barrier, North West Cape, G. of Carpentaria)
N: 25
Lg.:
(34) F: 0,82-0,72; (66) F: 0,79-0,765; M: 0,7; (107) F: 0,76; (109) F: 0,8-0,72; (666) F: 0,77-0,75; M: 0,7-0,68; (786) M: 0,82; (1152)* F: 0,78-0,80; M: 0,73-0,734; {F: 0,72-0,82; M: 0,68-0,82}
* Total body lengyh in lateral view.
Rem.: Epiplanktonic. For Boxshall & Halsey (2004, p.491) the subgenus (Dahl, 1912) is considered as full generic status pending phylogenetic revision of the whole family at the generic level.
Dernière mise à jour : 07/02/2016

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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2020. - Diversité et répartition géographique chez les Copépodes planctoniques marins. Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 27 septembre 2020]

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