An illustrated catalogue of the scalpellid barnacles (Crustacea: Cirripedia: Scalpellidae) collected during the HMS “ Challenger ” expedition and deposited in the Natural History Museum, London Author Shalaeva, Kate kshalaeva@googlemail.com Author Boxshall, Geoff kshalaeva@googlemail.com text Zootaxa 2014 2014-05-29 3804 1 1 63 journal article 5379 10.11646/zootaxa.3804.1.1 6bf67a5d-ecd7-4f43-b3df-ebcad1333e71 1175-5326 4917932 C1A766F2-D26E-4567-A977-61EF72CBD83A Arcoscalpellum triangulare ( Hoek, 1883 ) Fig. 16 Scalpellum triangulare Hoek, 1883: 130 , pl. III, figs 17–18, pl. XI, fig. 4; Zevina, 1964: 253. Arcoscalpellum triangulare : Newman & Ross, 1971: 84 , fig. 42; Zevina, 1981a: 326–327 , fig. 248; Young, 1992: 54 , fig. 8 c–e.? Arcoscalpellum triangulare : Foster & Buckeridge, 1995a: 355 , fig. 3D. FIGURE 15A. Arcoscalpellum michelottianum ( Seguenza, 1876 ) . “Challenger” Stn 335: holotype of Scalpellum velutinum , right lateral view. Scale bar 10 mm. FIGURE 15B. Arcoscalpellum michelottianum ( Seguenza, 1876 ) . “Challenger” Stn III: juveniles of Scalpellum velutinum , lateral view. Scale bar 10 mm. Material examined. Three syntypes NHM UK 2013.1090-1092, Stn 320: Atlantic , Southwest (off Rio La Plata , Argentina ); 1097 m . Found together with S. parallelogramma Hoek, 1883 ; attached to a sclerodermous zoantharian . Supplementary description. Young (1992) . Distribution. Atlantic, Southwest and Antarctic; Pacific, Antarctic;?Pacific, Western Central. Known depth range (135?) 370 to 1097 m . Habitat. On corals and polychaete tubes.