Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Tortanidae ( Family )
            Tortanus ( Genus )
                Atortus ( Sub-Genus )
Tortanus (Atortus) ryukyuensis  Ohtsuka & Kimoto, 1989   (F,M)
Ref.:
Ohtsuka & Kimoto, 1989 (p.393, figs.F,M); Ohtsuka, 1992 a (p.265); Chihara & Omori, 1997 (p.926, Pl.187,189: F,M); Boxshall & Halsey, 2004 (p.213: figs.F,M)
Species Tortanus (Atortus) ryukyuensis - Plate 1 of morphological figuresissued from : S. Ohtsuka & K. Kimoto in J. Crustacean Biol., 1989, 9 (3). [p.395, Fig.2].
Female (from Okinawa): A, habitus (dorsal); B, eye protuberance (lateral view); C, 5th pediger and urosome (dorsal); D, idem (lateral left side, spermatohore omitted); E, genital operculum); F, A1; G, A2; H, Md (cutting edge); I, Md (mandibular palp); J, Mx1.


Species Tortanus (Atortus) ryukyuensis - Plate 2 of morphological figuresissued from : S. Ohtsuka & K. Kimoto in J. Crustacean Biol., 1989, 9 (3). [p.396, Fig.3].
Female: A, Mx2; B, Mxp; C, P1; D, P2; E, P3; F, P4; G-H, P5. Holotype: B-G; paratype A-H.


Species Tortanus (Atortus) ryukyuensis - Plate 3 of morphological figuresissued from : S. Ohtsuka & K. Kimoto in J. Crustacean Biol., 1989, 9 (3). [p.397, Fig.4].
Male: A, habitus (dorsal); B, 5th pediger and urosome (dorsal); C, urosome (lateral right side); D-E, lateral process of 2nd urosomal segment (lateral right side); F, right A1; G, P5 (anterior); H, terminal two segments of left P5 (posterior); I, right P5 (posterior). Holotype: B-G

Compl. Ref.:
Nishida & Cho, 2005 (p.232, Fig.4: chart)
NZ: 1

Distribution map of Tortanus (Atortus) ryukyuensis by geographical zones
Species Tortanus (Atortus) ryukyuensis - Distribution map 2issued from : S. Ohtsuka & K. Kimoto in J. Crustacean Biol., 1989, 9 (3). [p.404, Fig.10].
Distribution of several species of the subgenus Atortus. Localities: 1, Poseta Bay; 2, Sagami Bay; 3, Tanabe Bay; 4, Shijiki Bay; 5, Shibushi Bay; 6, Ryukyu Islands; 7, Pago Pago Harbor, Samoa; 8, Palau Tiga, Sabah; 9, Saleyer Anchorage; 10, Nankauri Harbor, Nicobars.
Loc:
S Japan (Ryukyu Islands, Okinawa)
N: 1
Lg.:
(642) F: 2,26-2,08; M: 1,88-1,66; F: 2,14; M: 1,78; {F: 2,08-2,26; M: 1,66-1,88}
Rem.: hyperbenthic.
For Nishida & Cho (2005, p.229) this species belongs in the subgenus Atortus to the ''species complex tropicus''.
Last update : 01/02/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed October 02, 2022]

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