Species Card of Copepod
Calanoida ( Order )
    Epacteriscoidea ( Superfamily )
        Ridgewayiidae ( Family )
            Placocalanus ( Genus )
Placocalanus inermis  Ohtsuka, Fosshagen & Soh, 1996   (F,M)
Ref.:
Ohtsuka & al.,1996 (p.254, figs.F,M)
Species Placocalanus inermis - Plate 1 of morphological figuresissued from : S. Ohtsuka , A. Fosshagen & H.Y. Soh inSarsia, 1996, 81. [p.254, Fig.4].
Female (from Nagannu Is., Okinawa): A, habitus (dorsal); B, idem (lateral right side); C, rostrum; D, genital double-somite (ventral; seminal receptacle arrowed).
Scales in mm.


Species Placocalanus inermis - Plate 2 of morphological figuresissued from : S. Ohtsuka , A. Fosshagen & H.Y. Soh inSarsia, 1996, 81. [p.256, Fig.5].
Female: A, A2 (coxa, basis and endopod); B, A2 (exopod); C, Md (mandibular gnathobase); D, Md (mandibular palp); E, Mx1; F, Mx2; G, Mxp; H, P1 (anterior surface); I, endopod of P1; J, P2 (anterior surface); K, P3 (anterior surface); L, P4 (posterior surface); M, P5 (posterior surface); N, endopod of P5.
Scales in mm. Holotype: A-F, H-N; paratype: G.


Species Placocalanus inermis - Plate 3 of morphological figuresissued from : S. Ohtsuka , A. Fosshagen & H.Y. Soh inSarsia, 1996, 81. [p.257, Fig.6].
Male: A, habitus (lateral right side); B, right A1 (segment XXV arrowed); C, left P5 (posterior surface); D, right P5 (posterior surface).
Scales in mm.

NZ: 1

Distribution map of Placocalanus inermis by geographical zones
Loc:
S Japan (Nagannu Island, Okinawa)
N: 1
Lg.:
(514) F: 0,48-0,45; M: 0,49; {F: 0,45-0,48; M: 0,49}
Rem.: hyperbenthic (depth: 47-51 m). Sandy bottom.
Cf. P. longicauda in Ohtsuka & al. (1996, p.253, Table 1).
Last update : 28/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed June 25, 2024]

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