Hemilamprops pectinatus Lomakina, 1955

Gerken, Sarah, 2018, The Lampropidae (Crustacea: Cumacea) of the World, Zootaxa 4428 (1), pp. 1-192 : 79

Hemilamprops pectinatus Lomakina, 1955

Hemilamprops pectinatus Lomakina, 1955: 138 , figs 34–36; 1958a: 101–103, fig. 49.

Type material. Deposition unknown. Sea of Okhotsk. Not seen .

Diagnosis. Carapace with several lateral ridges, without setae, dorsal crest entire. Pleonites with dorsal crest. Telson 0.9 length of uropod peduncles, with 6 pairs lateral setae, 3 terminal setae. Uropod exopod article 1 1.7 length of article 2. Adult male carapace square in dorsal view, vs, oval in female, sculpturing reduced; antenna extending just past pereon; telson with 3 pairs lateral setae.

Depth. 31–440 m.

Distribution. Western Boreal Pacific, 59.2°N, 143°15’E.

Remarks. The male carapace shape is unusual, being square in dorsal view while the female is oval in a similar view. The male carapace is less sculptured than the female, as expected in a swimming male. The most similar species is H. bigibbus , from Japan, which can be differentiated by the proportions of the uropod exopod. In H. pectinatus in the uropod exopod, article 1 is longer than article 2, while in H. bigibbus article 1 is shorter than or subequal to article 2.