Alamprops longispina (Lomakina, 1958) Gerken, 2018

Gerken, Sarah, 2018, The Lampropidae (Crustacea: Cumacea) of the World, Zootaxa 4428 (1), pp. 1-192 : 16-17

Alamprops longispina (Lomakina, 1958) n. comb.

Lamprops quadriplicatus longispina Lomakina, 1958a: 85 , fig. 32.—Gamô, 1965: 196–203.

Type material. None designated. Siauhu Bay .

Diagnosis. Carapace with 4 lateral ridges; eyelobe not extending to anterior border of pseudorostrum. Telson with 4–5 pairs of lateral setae, 5 terminal setae, outermost pair twice lengt of central seta, inner pair shorter than central seta. Uropod peduncle with 10 medial setae; uropod exopod article 1 1.3 length of article 2. Male with antennal flagellum extending to posterior border of pereonite 3.

Depth. 0–21 m.

Distribution. Siauhu Bay; Peter the Great Bay; Hokkaido, Japan.

Remarks. This species was originally described by Lomakina (1958a) as a subspecies of A. quadriplicatus . The taxon is hereby elevated to the rank of species, as the long telson terminal setae serve to distinguish it from all other Alamprops and Lamprops with ridges on the carapace. The specimens described by Gamô (1965) were not seen, and it is possible that they represent yet another species of Alamprops with multiple ridges on the carapace. This species can be differentiated from A. augustinensis , A. krasheninnikovi and A. quadriplicatus by the number of lateral setae on the telson; in the other species there are no more than three pairs of lateral setae, while in A. longispina there are four or more pairs of lateral setae.