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 Trianguloscalpellum regium (W. Thomson, 1873) Fig. 33 A, B Scalpellum regium Wyville-Thomson, 1873: 347–348 [description only, not figs 1–2 which refer to Trianguloscalpellum ovale ( Hoek, 1883 ) ]. Scalpellum regium : Wyville-Thomson, 1877: 4 , figs 2–3; Hoek, 1883: 106 , pl. IV, figs 3–5, pl. IX, fig.12, pl. X, figs 1–2; 1884: 10; Pilsbry, 1907a: 28 , pl. III, fig. 5 [not pl. III, fig. 4 = T. ovale ( Hoek, 1883 ) ]; Gruvel, 1912: 2 ; 1920: 30 , pl. 1, fig. 7; Zevina, 1970: 263 , figs 10–11; 1973c: 136 [(not S. regium , probably T. gigas ( Hoek, 1883 ) ]; 1976: 1155. Scalpellum molle Aurivillius, 1898: 191 ; Gruvel, 1905: 77 ; 1920: 29 , pl. V, figs 10–12; Nilsson-Cantell, 1955: 218 ; Belloc, 1959: 3 ; Zevina, 1976: 1155 . FIGURE 31. Trianguloscalpellum moluccanum ( Hoek, 1883 ) . “Challenger” Stn 195: holotype, left lateral view. Scale bar 10 mm. FIGURE 32. Trianguloscalpellum ovale ( Hoek, 1883 . “Challenger” Stn 61: holotype, right lateral view. Scale bar 10 mm. non T. regium: Zevina, 1981b: 86 ; Foster & Buckeridge, 1995a: 355 , fig. 6K [( Trianguloscalpellum moluccanum? ( Hoek, 1883)]. Scalpellum regium latidorsum Pilsbry, 1907a: 29 . Arcoscalpellum regium: Weisbord, 1977: 271 , pl. 31, fig. 1–5. Trianguloscalpellum regium: Zevina, 1978b: 1350 ; Shreider, 1994: 159 ; Foster & Buckeridge, 1995b: 167 , figs 2A–D, 3; Young, 1998b: 28–30 , figs 20a–h, 22; 1999b: 617, fig. 5B,C; 2001a: 741; 2001b: 464, fig. 7; 2004: 26; 2007: 62–63, fig. 72; Poltarukha & Zevina, 2006a: 158 ; Poltarukha & Zevina, 2006b: 167 , fig. 5; Poltarukha, 2007: 20 , fig. 4; Chan et al. , 2009: 125–127, figs 106–108; Chan et al. , 2010: 13–14 , figs 1G, 10; Poltarukha, 2012: 37–38 , fig.11. Trianguloscalpellum regium regium : Zevina, 1981a: 309–310 , fig. 234; Zevina & Shreider, 1992: 40. Trianguloscalpellum regium latidorsum: Rosell, 1991: 22 , fig. 1h–i; Jones et al. , 2000: 253 . FIGURE 33A. Trianguloscalpellum regium (W. Thomson, 1873) . “Challenger” Stn 61: syntype A (left and right lateral view). Scale bar 10 cm. Material examined. Two syntypes (both partially disintegrated) NHM UK 2013.1127–1128, Stn 61: Atlantic, Western Central (North Western Atlantic Basin); 5210 m . Supplementary descriptions. Young (1998b) showed plates only; Chan et al. (2009) and Poltarukha (2012) described hard and soft parts. Distribution. Worldwide excluding polar region (see remarks). Known depth range 1507 to 6135 m . Remarks. This species may be attributed to the Arcoscalpellum michelottianum group. Numerous specimens have been described from the Atlantic, Pacific and Indian Oceans and this species may represent a complex of cryptic species. Some authors such as Zevina (1981a) and Poltarukha (2012) consider that T. regium is widely distributed across all regions, with the Pacific T. moluccanum treated as a synonym, whereas others retain them as separate species, e.g. Young (1998b , 2007 ). According to Hoek (1883) , “numerous” specimens of the species were found at two “Challenger” stations: 61 and 63. However, only two specimens (both from Stn 61) are now in the NHM collection. The two specimens , figured and referred as types by Young (1998b) , are treated here as syntypes , because it can be demonstrated that these were the specimens observed by Wyville-Thomson in his brief description in 1873. Both specimens are now in different stages of disintegration. One specimen ( syntype A) ( Fig. 33A ) has the tergum and the apical part of the carina separated ( Fig. 33B (b)). The other two fragments (tergum and scutum with the upper latus and upper fragment of the rostral latus joined) appear to belong to the second syntype ( syntype B) ( Fig. 33B (a, c, d)).