Hemilamprops japonicus ( Harada, 1959 )

Gerken, Sarah, 2018, The Lampropidae (Crustacea: Cumacea) of the World, Zootaxa 4428 (1), pp. 1-192 : 78

Hemilamprops japonicus ( Harada, 1959)

Lampropoides japonicus Harada, 1959: 237 .—Gamô, 1960: 118, pl. 59, fig. 8.

Type material. Deposition unknown. Shimoda Bay , Izu Peninsula, Japan. Not seen .

Diagnosis. Carapace with 2 lateral ridges, 1 incomplete, without setae, dorsal crest entire. Telson equal to length of uropod peduncles, with 5 pairs lateral setae, 5 terminal setae, outermost pair longest, central seta long, inner pair very short. Uropod exopod article 1 1.1 length of article 2. Adult male antenna extending to posterior border of pleonite 5; telson with 5 pairs lateral setae.

Depth. The author stated “in shallow water” ( Harada 1959).

Distribution. Shimoda Bay, Izu Peninsula, Japan, 34°8’N, 139°E.

Remarks. Harada (1959) stated living specimens had melanophores, with black bands on the third and fourth pereonites and the second, third and fourth pleonites. Hemilamprops japonicus is most similar to H. californicus , H. glabrus and H. pacificus , but can be distinguished by the two lateral ridges on the carapace, while the other species have a single lateral ridge on the carapace.