Plate 1 issued from : S. Ohtsuka, S. Nishida & R.J. Machida in J. Nat. Hist., 2005, 39 (27). [p.2487, Fig.1].
Female (from Sulu Sea): A-B, habitus (dorsal and lateral, respectively); C, rostrum (ventral); D, last compound pedigerous somite and genital double-somite (lateral); E, genital double-somite (ventral); F, left A1; J, terminal segments of left A1; H, right A1; I, terminal segment of right A1; J, terminal segments of A2 endopod; K, A2 exopod (terminal segments missing).
Scale bars in mm.

Nota: Cephalosome slightly asymmetrical in dorsal view.
Rostrum strongly curved, with pair of thick filaments.
Prosome 2.6 times as long as urosome.
Urosome 4-segmented.
Genital double-somite with ventral transverse ridge midway; genital system asymmetrical, with right seminal receptacle larger than left; paired gonopores and copulatory pores located at mid-length; each copulatory pore slit-like, located at inner corner of gonopore, connected to curved, thick copulatory pore. Two large, mature eggs visible within prosome.
A1 considerably asymmetrical, with left ca 1.5 times longer than right; left A1 21-segmented.

Plate 2 issued from : S. Ohtsuka, S. Nishida & R.J. Machida in J. Nat. Hist., 2005, 39 (27). [p.2488, Fig.2].
Female: A, A2; B, Md; C, Mx1; D, Mx2; E, basal spine of Mx2; F, Mxp; G, 4th endopodal segment of Mxp (largest seta omitted); H, 5th endopodal segment of Mxp (largest seta omitted).
Scale bars in mm.

Nota: A2: Endopod indistinctly 3-segmented; exopod 10-segmented with setal formula 0, 0, 1, 1, 1, 1, 1, 1, 0, 2; terminal segment lacking vestigial element (as seen in Metacalanus) Coxa unarmed; basis with inner seta half as long as exopod.
Md without patch of long setules on gnathobase; cutting edge with 2 patches of minute spinules and 4 teeth, dorsalmost of which tricuspid; endopod rudimentary, 1-segmented, with 2 plumose setae terminally; rxopod 5-segmented, with setal formula 1, 1, 1, 1, 2; terminal setae well developed
Mx1 with 1 naked short, and 4 serrate long spines on inner distal corner of praecoxal arthrite; coxal endite with moderately developed, serrate seta; coxal epipodite bearing 6 setae; basal seta absent; endopod 1-segmented, bulbous, with 2 unequal setae; exopod 1-segmented, lamellar, bearing 3 terminal setae.
Mx2 stout; 1st praecoxal endite with 2 unequal spinulose setae and vestigial element; 2nd praecoxal to 2nd coxal endites each bearing 2 spinulose setae; basal spine highly sclerotized, with short row of 3 or 4 spinules at mid-length; endopod 4-segmented, with setal formula 1, 3, 2, 2; setae bearing longitudinal row of large spinules.
Mxp with syncoxa bearing 1 middle and 2 subterminal serrate setae and terminal patch of short spinules; basis as long as syncoxa, with 2 serrate medial setae, row of setules along proximal half of inner margin, and longitudinal patch of spinules; 1st endopodal segment almost separate from basis, with serrate seta; 2nd to 5th segments bearing 4, 4, 3, and 3 setae, respectively; 6th segment with setae a and b not reduced.

Plate 3 issued from : S. Ohtsuka, S. Nishida & R.J. Machida in J. Nat. Hist., 2005, 39 (27). [p.2489, Fig.3].
Female: A, P1 (posterior); B, 3rd exopodal segment of P1 (posterior); C, outer lateral margin of endopod of P1 (posterior); D, inner basal seta of left P1; E, inner basal seta of right P1; F, right P2 (anterior); G, 3rd exopodal segment of left P2; H, phoront of apostome ciliates (?) on intercoxal sclerite of P2; I, right P3 (anterior); J, 2nd and 3rd exopodal segments of left P3 (anterior); K, P4 (posterior); L, 1st exopodal segment of right P4 (posterior; 2nd and 3rd segments missing); M, P5 (posterior).
Phoronts of apostome ciliates (?) indicated by arrowheads.
Scale bars in mm.

Nota: Assymmetry of the swimming legs 1 to 3 (maybe, leg 4 also).
P5 nearly symmetrical; coxae and intercoxal sclerite separate; basis bearing thick, subterminal seta on posterior surface; endopod lacking; exopod 1-segmented, with 2 lateral and 2 terminal spines; acute process present at base of inner terminal spine; outer terminal process more acutely pointed in right leg than in left.

Plate 4 issued from : S. Ohtsuka, S. Nishida & R.J. Machida in J. Nat. Hist., 2005, 39 (27). [p.2490].
Female: Armature formula of swimming legs P1 to P4.
Roman numerals = spines; Arabic numerals = setae.