Plate 1 issued from : K.A. Brodsky, N. V. Vyshkvartzeva, M.S. Kos & E.L. Markhaseva in Opred. Faune SSSR, 1983, 135 (1). [p.196, Fig.87].
Female: habitus (dorsal and lateral, respectively); R, forehead and rostrum; Mx2; Gn, genital segment (dorsal, lateral and ventral: respectively Gn1, Gn2 and Gn3.
Nota: Genital segment barrel-like.

Complement from Bradford-Grieve & al. (2017, p.129):
- Forehead, in dorsal view, with low prpjection bearing pair of small spine-like processes.
- In lateral view, posterior corners of pediger 5 symmetrical, rounded, but slightly pointed in dorsal view.
- Genital double-somite markedly swollen and symmetrical in dorsal view, wider than long, with lateral surfaces ornamented with large spinules.
- A1 extending beyond caudal rami by 4-6 segments; anterior and posterior borders of ancestral segments XVI-XXI smooth.

Plate 2 issued from : K.A. Brodsky, N. V. Vyshkvartzeva, M.S. Kos & E.L. Markhaseva in Opred. Faune SSSR, 1983, 135 (1). [p.197, Fig.87 (continuation)].
Female.
Pmd = mandibular palp; Md = mandibular blade (gnathobase).

Complement from Bradford-Grieve & al. (2017, p.129):
- A2 exopod ancestral segment III with small seta and segment IV with short seta extending beyond segment VIII, no sign of setae on ancestral segments I and II.
- Mx1 praecoxal arthrite with 14 setae including 3 on posterior surface and 1 longer and 1 smaller on anterior surface; coxal endite without setae; basal endites 1 and 2 with 2 and 4/5 setae, respectibvely; endopod segments with 2, 2, 5+1 small anterior surface seta; basal exite with 1 seta, epipodite with 7 long and 2 short, reduced setae.
- Mxp syncoxa endite 4 longest seta extending beyond distal border of endopod segment 2; endopod segments 2-6 with 4 (including 3 small), 3 (including 2 small), 3 (including 2 small) + 1, 4 setae (2 large and 2 very small of which 1 on outer border), respectively.
- P1 exopodal segment 3 with 1 outer border spine.

Plate 3 Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.91, Table 10].
Morphological characters after identification key of Bathycalanus females and males.
Compare to other species of genus.

Main characters identification after species key :
1 - Mx1 praecoxal endite without setae.
2 - Anterior margin of head with 2 very small spine-like processes.
3 - P1 exopod segments 2 and 3 separate;
4 - Pedigerous somites 4 and 5 without laterally extended lappets; Genital double not angular shaped.
5 - Genital double-somite very swollen in dorsal view, decorated with spinules. (male unknown).