Plate 1 issued from : A.G. Humes in Proc. Biol. Soc. Wash., 1988, 101 (4). [p.826, Fig.1].
Male (from Galapagos Rift): a, habitus (dorsal; scale A); b, outline of epimera bearing P1-P4 (lateral; scale B); c, urosome (dorsal; scale B); d, caudal ramus (ventral; scale C); e, rostrum (lateral).
Nota: Caudal ramus, ratio 3:1. Anal segment with very small spinules over surface of anal operculum and ventral transverse row of minute spinules near insertion of both rami.

Plate 2 issued from : A.G. Humes in Proc. Biol. Soc. Wash., 1988, 101 (4). [p.827, Fig.2].
Male: a, A1 (anterodorsal; scale B); b, A2 (outer; scale D); c, oral cone (lateral; scale D); d, Md (anterior; scale C); e, Mx1 (anterior; scale C); f, Mx2 (anterior; scale C).
Nota: A1 11-segmented. Md without palp, elongate with few minute terminal teeth.

Plate 3 issued from : A.G. Humes in Proc. Biol. Soc. Wash., 1988, 101 (4). [p.828, Fig.3].
Male: a, Mxp (anterior; scale D); b, area between Mxp and P1 (ventral; scale B); c, P1 and intercoxal plate (anterior; scale D); d, P2 and intercoxal plate (anterior; scale D).
Nota: Exopod of P1 with the armature I-1; O-1; II-2-3.

Plate 4 issued from : A.G. Humes in Proc. Biol. Soc. Wash., 1988, 101 (4). [p.829, Fig.4].
Male: a, P3 and intercoxal plate (anterior; scale D); b, P4 and intercoxal plate (anterior); scale D);
Nota: Armature of egment 3 of the exopod of P3 with II-I-5.

Plate 5 issued from : A.G. Humes in Proc. Biol. Soc. Wash., 1988, 101 (4). [p.830, Fig.5].
Male: a, P5 (ventral view; scale B); b, P6 (ventral view; scale B): c, P5 and P6 (lateral; scale B).
Nota: Distal seta on the lateral margin of the free segment of P5 being about one-half the length of the free segment. P6 forming posteroventral flap on genital segment bearing 1 long barbed seta, 1 shorter smooth seta and between them 1 very small seta.