Plate 1 issued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 2000, 31. [p.246, Fig.94].
Female: a, habitus (left side); b, c, urosome (left, dorsal, respectively); d, e, forehead (left, dorsal, respectively); f, g, genital somite (ventral, left, respectively); h, genital somite from different specimen (left); i, left Mx2 (posterior).

Nota: Urosome 30% length of body. Length ratios of 4 urosomal somites and left caudal ramus 37.6 : 17.6 : 13.9 : 9.1 ; 21.8 = 100.
A1 extending beyond posterior end of caudal ramus by its last 3 or 4 segments.
Mx2: Posterior subterminal spine of 4th lobe 40% as long as 2nd saberlike spine; falcate spine of 5th lobe with proximal half of medial margin serrated with spinules and approximately 1.2 times length of saberlike.

Plate 2 issued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 2000, 31. [p.247, Fig.95].
Female: a, P5 (anterior); b, exopod of P5 (posterior).

Male: c, P5 (anterior); d, exopod of right P5 (posterior); e, second exopodal segment of right P5 (posterior); f, g, basipod of right P5 (anterior, posterior, respectively); h, i, basipod of right P5 from different specimen (anterior, posterior, respectively); j, exopod of left P5 (anterior); k, distal end of exopod of right P5 (lateral).

Plate 3 Heterorhabdus oikoumenikis female:
1 - See key to species groups of Heterorhabdus: ''abyssalis'' Group (p.90, 114).
2 - Genital somite without a conical projection mediodorsally (Fig.94- a, b).
3 - Laterally, genital somite without a tubercular outgrowth posteriorly on dorsal margin (Fig.94-b).
4 - Laterally, genital operculum far short of reaching posterior end of somite (Fig.94-b).
5 - Laterally, right and left genital flanges symmetrical.
6 - Laterally, genital prominence gradually merging onto ventral wall of somite (Fig.94-b).
7 - Dorsally, genital somite only slightly asymmetrical (Fig.94-c).

Plate 4 Heterorhabdus oikoumenikis male:
1 - See key to species groups of Heterorhabdus: ''abyssalis'' Group (p.90, 114).
2 - Basis of left P5 without a well-developed inner lobe (Fig.95-c).
3 - Basal inner lobe of right P5 armed with normal bristles (Fig.95-c, f).
4 - 3rd exopodal segment of right P5 with a short terminal lobe, slightly less than 1/3 length of terminal spine (Fig.95-c, d, k).
5 - Basal lobe of right P5 arising from anteromedial side of segment (Fig. 95-c, d).
6 - 2nd exopodal segment of left P5 with outer spine borne on a conical process (Fig.95-j).
7 - Basal lobe of right P5 nearly straight (Fig.95-c).
8 - Basal lobe of right P5 with an single band of bristles (Fig.105-f).
9 - Basal lobe of right P5 with an addirional row of bristles (Fig.95-i).
10 - 3rd exopodal segment of right P5 trmatibely short and curved (Fig.95-c).