The French expeditions SEAMOUNT 2, PROSPEC, MARVEL, BENGAL, DIVA II, SAINT PAUL and EQUAMARGE collected samples from the West European, Iberian, and Canary basins, the Mid-Atlantic Ridge near the Azores Archipelago, and the Ivory Coast-Ghana ridge. These expeditions recovered 36 species of cirripeds: three heteralepadomorphs, seven lepadomorphs, 14 scalpellomorphs, seven verrucomorphs and five balanomorphs. Among these two are new: Heteralepas segonzaci n. sp. characterized by a capitulum with irregular deep and wide grooves, aperture more than half of capitulum length, carinal margin without conspicuous crests, peduncle almost one-third of capitulum length, median articles of cirri VI with distal margin with simple scales on posterior half; and Barbascalpellum rossi n. sp. characterized by a capitulum with occludent margin little convex, scutum length of lateral arm less than one-third length of tergal margin, upper-latus pentagonal with subapical umbo, rostro-latus with width almost four times height, rostrum absent, caudal appendage with five articles, length nearly length of protopodite. Heteralepas meteorensis Carriol, 1998, is considered a junior subjective synonym of Heteralepas microstoma (Gruvel, 1901), and Poecilasma inaequilaterale breve Pilsbry, 1907 is synonymous with Poecilasma crassa (Gray, 1848). Amigdoscalpellum semisculptum (Pilsbry, 1907) is considered to be distinct from Arcoscalpellum mamillatum (Aurivillius, 1898) n. comb. Teloscalpellum atlanticum (Gruvel, 1900) is transferred to Arcoscalpellum.
Crustacea, Cirripedia, Thoracica, Northeast Atlantic, new species, deep-sea.