Hemilamprops pterini Shalla & Bishop, 2007: 1193–1196, figs 2, 3.
Type material. Holotype: NMSZ 2000.249.1644, immature male. Paratypes: NMSZ 1999.238.0278, 1 preparatory female; NMSZ 1999.238.0279, 1 preparatory male; NMSZ 1999.217.01003, 1 pre-preparatory female. Not seen.
Diagnosis. Carapace with one lateral ridge, without setae, dorsal crest entire. Pleonites without dorsal crest. Telson 0.8 length of uropod peduncles, with 2–3 pairs lateral setae, 3 terminal setae. Uropod exopod article 1 1.1 length of article 2. Adult male unknown.
Depth. 235–1095 m.
Distribution. Boreal northeastern Atlantic, 60– 62°N, 0– 3°W.
Remarks. Hemilamprops pterini is most similar to H. chilensis, but can be differentiated by the carapace lateral ridges. In H. pterini a lateral ridge sweeps from the pseudorostrum dorsally and connects with the branchial expansions, while in H. chilensis the lateral ridge is short and ventral to the pseudorostral suture, and does not come dorsal of the midline of the body.