High cryptic diversity in the kleptoparasitic genus Hyalorisia Dall, 1889 (Littorinimorpha: Capulidae) with the description of nine new species from the Indo-West Pacific Author Fassio, Giulia Author Russini, Valeria Author Buge, Barbara Author Schiaparelli, Stefano Author Modica, Maria Vittoria Author Bouchet, Philippe Author Oliverio, Marco text Journal of Molluscan Studies 2020 Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen 2020-09-18 86 4 401 421 http://dx.doi.org/10.1093/mollus/eyaa028 journal article 10.1093/mollus/eyaa028 613998a5-1f0e-46b2-9141-a0bce996b557 4464900 6DBF9C90-3CAA-49F3-A9ED-9611D073840F Hyalorisia galea ( Dall, 1889 ) MOTU-1 ( Figs 3A , 4A , 7A, J , 8C, D ) Capulus ( Hyalorisia ) galea Dall, 1889: 288 , pl. 14, fig. 3 [ off Barbados ( Blake stn 275 ), 12°58 N , 59°27 W , 397 m ; holotype USNM 508724 ]. Capulus galeus ( sic )— Robinson, 1983: 9 . Hyalorisia galea ( Dall, 1889 ) Gracia Clavijo, Ardila & Díaz, 2004: 52 , fig. 22. Rosenberg, Moretzsohn & García, 2009: 635 . Daccarett & Bossio, 2011: 64 . García, 2012: 34 , fig. 4. Plesiothyreus galea Christiaens, 1989: 22 . Material examined : The holotype (only photographic images examined; Fig. 8 A–C) and other material ( MNHN-IM-2013-60195 , MNHN-IM-2013-61224 , MNHN-IM-2013-61525 and MNHN-IM-2013-61536 ) . COI-based diagnosis : Ten diagnostic (autapomorphic) positions in alignment: 74(C), 145(T), 184(G), 208(G), 304(T), 418(A), 424(T), 601(C), 622(A) and 637(T). Shell (data for holotype shown within parentheses) : Size medium to large for the genus: length 13–25 (15.5) mm, width 9–21 (10.7) mm, height 2.5–8 (4.9) mm; thin, rounded, ellipsoidal or ovoidal, depressed; white shell surface with smooth yellowish periostracum; anterior margin rounded or very slightly angled; protoconch of 1– 1.2 whorls, diameter of nucleus 0.17–0.20 mm ; teleoconch smooth except for distinct commarginal growth ridges; apertural margin thin, interior glossy white; lamella narrow, width 0.14–2 (0.14) mm. Soft parts (ethanol preserved) : Head, cephalic tentacles, pseudoproboscis and mantle whitish. Radula : Taenioglossate, 2-1-R-1-2; marginal teeth sickle shaped; lateral teeth triangular, outer edge smooth or with few denticles, inneedge smooth or with one denticle; rachidian tooth triangular, highly denticulated on both edges. Figure 8. A–C. Holotype of Capulus ( Hyalorisia ) galea Dall, 1889 , USNM 508724, off Barbados. D–F. Holotype of Capulus ( Hyalorisia ) tosaensis Otuka, 1939 , Seto Marine Biological Laboratory, collected from Bay of Tosa, Japan. G–I. Syntype of Capulus fragilis E. A. Smith, 1904 , NHMUK 1904.6.15.136, Laccadive Sea. J. Original figure of Capulus fallax S. V. Wood, 1842 (Wood, 1842: pl. 17, fig. 4a, b), Lower Pliocene of England. K–N. Holotype of Capulus ( Hyalorisia ) nettlesi J. E. Robinson, 1983 , PRI 30058, Upper Eocene of Mississippi. Scale bars: A–E , G–I , K–N = 10 mm; F = 5 mm. Photo credits: A–C , USNM; D–F , Kyoto University (taken by Ryutaro Goto); G–I , NHMUK (taken by Harry Taylor); K–N , Paleontological Research Institution, Ithaca, NY. Figure 9. Bivalve hosts ( Propeamussium spp.) with foot mark (black arrows) and notch (white arrows) of Hyalorisia . A. Propeamussium sibogai , MNHN-IM-2007- 33954 ( L = 46.7 mm), host of H. nupta n. sp. (MNHN-IM-2007-34010). B. Propeamussium caducum , MNHN-IM-2007-39095 ( L = 17.8 mm), host of H. kely n. sp. (MNHN-IM-2007-39091). C, D. Propeamussium dalli , MNHN-IM-2013-60196 ( L = 83 mm) with H. galea (MNHN-IM-2013-60195) still attached. Photo credits: MNHN; taken by Yves Terryn ( A , B ) and Laurent Charles ( C ). Scale bars = 5 mm. Host : Two individuals of H. galaea , MNHN-IM-2013-60195 and MNHN-IM-2013-61224, were attached to two examples of Propeamussium dalli (MNHN-IM-2013-60196 and MNHN-IM-2013-61223, respectively). Two other specimens of H. galaea ( MNHN-IM- 2013-61525 and MNHN-IM-2013-61536) were collected at stations where the only Propeamussiidae found were P. dalli and Parvamussium cancellatum (E. A. Smith, 1885) . García (2012 : fig. 4) reported H. galea attached to a living Propeamussium sp. from the Gulf of Mexico , off Louisiana . Distribution : From the Louisiana Slope to Barbados and the Caribbean coast of Colombia , at depths of 397– 835 m.