Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Macandrewella ( Genus )
Macandrewella omorii  Ohtsuka, Nishida & Nakaguchi, 2002   (F,M)
Ref.:
Ohtsuka & al., 2002 (p.545, figs.F,M)
Species Macandrewella omorii - Plate 1 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.547, Fig.11].
Female (from off Tokashiki Shima Is.): A, habitus (dorsal); B, rostrum and cuticular lens (lateral); C, prosomal end and urosome with spermatophore (lateral left side); D, idem (lateral right side); E, genital double-somite (ventral); F, syncoxa of Mxp; G, prosomal ends and urosome with spermatophore (dorsal).

Nota: Cuticular lens present at base of rostrum. Posterior ends of prosome slightly asymmetrical. 2nd and 3rd urosomites with striated posterior margin. Anal somite small. A1 23-segmented. Endopod of Mx2 with 3 worm-like and 5 brush-lke sensory setae. Mxp with syncoxa having of long setules proximally. P5 absent.


Species Macandrewella omorii - Plate 2 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.548, Fig.12 A].
Female (SEM micrograph): A, rostrum and cuticular lens indicated by arrow (frontal view).
Scale = 0.1 mm.


Species Macandrewella omorii - Plate 3 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.549, Fig.13].
Female (SEM micrographs): A, urosome with spermatophore (ventral); B, idem (ventral, spermatophore removed); C, idem (lateral right side, spermatophore proper and linguiform genital operculum indicated by large and small arrows, respectively); D, genital operculum.
Scales = 0.01 mm.


Species Macandrewella omorii - Plate 4 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.548, Fig.12 C-E].
Female (SEM micrographs): c, sensory setae on endopod of Mx2 (D: brush-like; E: worm-like; closed and open circles, respectively.
Scales = 0.01 mm (C); 0.001 mm (D, E).


Species Macandrewella omorii - Plate 5 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.550, Fig.14].
Female: A, right P2 (anterior, coxa omitted); B, 2nd endopod segment of left P2 (anterior); C, P3 (anterior, coxa omitted); D, P4 (anterior, coxa omitted).

Male: E, habitus (lateral left side); F, cuticular lens (lateral); G, right posterior corner of prosome (lateral right side); H, prosomal end and urosome (lateral left side).


Species Macandrewella omorii - Plate 6 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.541, Fig.8].
Male: K, endopod of P2 (anterior); L, endopod of P3 (anterior); M, endopod of P4 (anterior).


Species Macandrewella omorii - Plate 7 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.551, Fig.15].
Male: A, prosomal ends and urosome (dorsal); B, anal somite and caudal rami (ventral); C, A1 (segments I to X-XV); D, A1 (segments XVI-XVII to XXII); E, A1 (segments XXIII to XXVII-XXVIII); F, A1 (compound segment XXVII-XXVIII); G, left P5; H, right P5; I, terminal portion of left exopod of P5; J, inner margin of left endopod of P5.
Nota: 5th pediger asymmetrical, with right process slightly larger than left; 2nd urosomite with left side more swollen laterally than right side.


Species Macandrewella omorii - Plate 8 of morphological figuresissued from : S. Ohtsuka, S. Nishida & K. Nakaguchi inJ. Nat. Hist., 2002, 36 [p.552, Fig.16].
Male (SEM micrographs): A-B, terminal portion of left exopod of P5 (elements indicated by \"a-d\").
Scales = 0.05 mm.

NZ: 1

Distribution map of Macandrewella omorii by geographical zones
Loc:
SW Okinawa (off Kume Shima Is., off Tokashiki Shima Is.)
N: 1
Lg.:
(903) F: 3,32-3,54; M: 3,38-3,62; 3,53-4,05; {F: 3,32-3,54; M: 3,38-4,05}
Rem.: hyperbenthic.
For Ohtsuka & al. (2002, p.552) this species is similar to M. joanae A. Scott, 1909 and M. asymmetrica Farran, 1936 in sharing the following characters: 1- the elongate linguiform genital operculum of the female; 2- the terminal segment of the right exopod of the male P5 with a stout outer middle process; 3- the large subterminal outer process on the 2nd exopodal segment of the male left P5. The female of M. joanae bears a distinct P5, whereazs it is lacking in M. omorii and M. asymmetrica.
Last update : 06/04/2016
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