Species Card of Copepod
Platycopioida ( Order )
    Platycopiidae ( Family )
        Platycopia ( Genus )
Platycopia orientalis  Ohtsuka & Boxshall, 1994   (F,M)
Ohtsuka & Boxshall, 1994 (p.152, figs.F,M, juv.); Boxshall & Huys, 1998 (p.768, fig.2); Ferrari & Dahms, 2007 (p.71, Rem.);
Species Platycopia orientalis - Plate 1 of morphological figuresissued from : S. Ohtsuka & G.A. Boxshall in J. Crustacean Biol., 1994, 14 (1). [p.153, Fig.1].
Female (from off Okinawa): A, habitus (dorsal); B, idem lateral right side); C, idem (another specimen); D, urosome (dorsal); E, idem (lateral right side); F, rostrum (frontal view); G, A1; H, A2; I, exopod of A2.
Nota: Cephalosome and 1st pedigerous somite incompletely fused (viewed laterally), 4th and 5th separate. Urosome 5-segmentedGenial somite small with minute prominence laterally. 1st to 3rd abdominal somites each fringed with hyaline lamella posteriorly; 3rd abdominal somite with medially incised pseudoperculum largely covering anal somite. Anal somite small with triangular, ventromedial process on posterior margin. Rostrum sharply pointed, without filaments, with median pore and paired sensilla proximally. A1 22-segmented, 1st segment with a well-developed longitudinal ridge on the outer surface.

Species Platycopia orientalis - Plate 2 of morphological figuresissued from : S. Ohtsuka & G.A. Boxshall in J. Crustacean Biol., 1994, 14 (1). [p.154, Fig.2].
Female: A, caudal ramus (posterior surface); B, labrum; C, position of intermaxillipedal process (Mx = Mx2, L = P1); D, basis and endopod of Mx2; E, endopod of Mxp.
Nota: Intermaxillipedal process (Fig.2C) not developed, bearing row of spinules on median sclerite between Mxp and P1, anterior margin chitinized, bearing fine wrinkles.

Species Platycopia orientalis - Plate 3 of morphological figuresissued from : S. Ohtsuka & G.A. Boxshall in J. Crustacean Biol., 1994, 14 (1). [p.155, Fig.3].
Female : A, Md; B, Mx1 (setae on basis and both rami omitted); C, basis and both rami of Mx1; D, Mx2; E, Mxp.
Nota: Endopod of Md 1-segmented with 6 setae apically; exopod4-segmented (setal formula: 0, 2, 1, 2, respectively). Praecoxal arthrite of Mx1 with 6 stout spines and 6 setae; pointed proximal process originating on outer margin of praecoxa; coxal endite with 3 terminal setae; coxal epipodite absent; basal exite small, with 2 small setae terminally; basal endite elongate with 3 spinulose setae distally; rami fused with basis distally, with 6 setae along outer margin (representing 2nd basal endite, endopod and exopod). Labrum tripartite; central lobe strongly produced ventrally, with tuft of strong spinules terminally and 2 pores subterminally; lateral lobes fringed with setules along posterior margin. Praecoxal and coxal endites of Mx2 with setal formula: 4, 1, 3, 3; basal endite with 2 stout and 2 fine setae; basis and 1st segment endopod segment fused (ti form allobasis), with stout endopodal seta distally; free endopod indistinctly 3-segmented (setal formula: 1, 2, 3, respectively). Syncoxa of Mxp with 2 terminal spinulose setae; basis with 2 medial setae of unequal lengths; 1st endopod segment partly incorporated into basis, with terminal seta directed outward, 2nd and 3rd segments each with long and short seta, 4th and 5th each with long seta; 6th with 4 setae of unequal lengths. intermaxillipedal process (Fig.2C)

Species Platycopia orientalis - Plate 4 of morphological figuresissued from : S. Ohtsuka & G.A. Boxshall in J. Crustacean Biol., 1994, 14 (1). [p.156, Fig.4].
Female: A, P1 (anterior); B, endopod of P1 (anterior); C, exopod of P1 (anterior); D, P2 (anterior); E, P3 (anterior); F, P4 (anterior); ; G, terminal endopod segment of P4 (anterior); H, P5 (posterior); I, endopod of P5 (posterior).
Nota: P5 with 2-segmented endopod and 3-segmented exopod; basis lacking inner seta; 2nd segment of endopod and 3rd segment of exopod each with 6 spines.

Male: J, habitus (lateral left side); K, 1st endopod segment of P2; L, 1st endopod segment of P4; M, P5 (anterior).
Nota: Urosome 5-segmented.A1 15-segmented. P5 symmetrical, biramous; basis with small subterminal outer spine; endopod 3-segmented, 1st segment small, with stout inner spine, 2nd segment with a patch of spinules on distal half surface and inner spine, 3rd segment expanded, covered with numerous spinules distally, and with 4 spines; exopod 3-segmented, 2nd and 3rd segments incompletely fused, inner margin of 3rd segment forming medial hollow, terminal part of segment irregularly expanded, with 4 thick, elongate spines (innermost one of which curved outward approximately at its midlength).

Species Platycopia orientalis - Plate 5 of morphological figuresissued from : S. Ohtsuka & G.A. Boxshall in J. Crustacean Biol., 1994, 14 (1). [p.162, Fig.9].
Female (SEM micrographs): A, genital and 1st abdominal somites (ventral view, gonopores indicated by arrows); B, gonopore of genital somite (magnification of A).

Male (SEM micrographs): C, genital and 1st abdominal somites (ventral view, gonopores indicated by large arrows, slitlike pore by small arrow); D, slitlike pore of genital somite (magnification of C).

Scale = 0.010 mm (A-C, 0.005 mm (D).

NZ: 1

Distribution map of Platycopia orientalis by geographical zones
Species Platycopia orientalis - Distribution map 2
Chart of 1996
NW Pacif. (off Nagannu Is.: Okinawa)
N: 1
(602) F: 0,53-0,48; M: 0,44-0,42; {F: 0,48-0,53; M: 0,42-0,44}
Rem.: epibenthic (depth : 52 m).
Last update : 08/02/2011
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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2014. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en 
[Accessed April 24, 2014]

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