Paralamprops semiornatus Fage, 1929: 24–26, pl. 2, figs 56–63.— Roccatagliata, 1994: 420–429, figs 15–33.
Type material. Holotype: MNHN-CU319, ovigerous female. West of Portugal.
Diagnosis. Carapace without lateral ridges, marginal carina dentate, ridge absent on pseudorostrum; eyelobe without lenses or tumidities. Antennule article 1 not expanded; accessory flagellum 1.1 main flagellum. Telson shorter than uropod peduncles, with 3 terminal setae, central seta longest. Uropod endopod article 1 1.5 length of articles 2 and 3 together. Adult male carapace rectangular in dorsal view, with sharp corners. Antennule with cluster of aesthetascs on article 1 of main flagellum. Antennal peduncle articles 4 and 5 with setae around entire circumference, flagellum extending past pereon, but not to end of pleon.
Depth. 2000–4000 m.
Distribution. North-east Atlantic, 41°1’N, 9°54’W and 38°N, 67– 71°W.
Remarks. Platytyphlops semiornatus is most similar to P. girardi, but in P. girardi the carapace is as wide as it is long, while in P. semiornatus the carapace is distinctly longer than wide.