Hyalorisia galea ( Dall, 1889 )

Fassio, Giulia, Russini, Valeria, Buge, Barbara, Schiaparelli, Stefano, Modica, Maria Vittoria, Bouchet, Philippe & Oliverio, Marco, 2020, High cryptic diversity in the kleptoparasitic genus Hyalorisia Dall, 1889 (Littorinimorpha: Capulidae) with the description of nine new species from the Indo-West Pacific, Journal of Molluscan Studies (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) 86 (4), pp. 401-421 : 411-414

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.

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.

Figures

Figure 3. Protoconchs of Hyalorisia. A. Hyalorisia galea, MNHN-IM-2013-61536. B. Hyalorisia neocaledonica n. sp., MNHN-IM-2013-65907. C. Hyalorisia tosaensis, MNHN-IM-2007-34794. D. Hyalorisia nupta n. sp., MNHN-IM-2007-34005. E. Hyalorisia lehibe n. sp., MNHN-IM-2007-39212. F. Hyalorisia nanhaiensis n. sp., MNHN-IM-2013-34796. G. Hyalorisia kely n. sp., MNHN-IM-2007-38809. H. Hyalorisia melanesica n. sp., MNHN-IM-2013-58359. I. Hyalorisia profunda n. sp., MNHN-IM-2007-33828. J. Hyalorisia madagascarensis n. sp., MNHN-IM-39292. K. Hyalorisia solomonensis n. sp., MNHN-IM-2007-34215. Scale bars = 100 µm.

Figure 4. Shells of Hyalorisia. A. Hyalorisia galea, MNHN-IM-2013-60195, N of Grande-Terre, Guadeloupe (L = 13 mm). B. Hyalorisia neocaledonica n. sp., holotype, MNHN-IM-2013-65645, Lord Howe Rise, New Caledonia (L = 9.5 mm). C. Hyalorisia tosaensis, MNHN-IM-2013-58352, New Ireland, Papua New Guinea (L = 15 mm). D. Hyalorisia nupta n. sp., holotype, MNHN-IM-2007-34010, Bellona Reefs, New Caledonia (L = 18.5 mm). Scale bars = 2 mm.

Figure 7. Radulae of Hyalorisia (A–I) and detail of the rachidian tooth (J–R). A, J. Hyalorisia galea MNHN-IM-2013-60195. B, K. Hyalorisia neocaledonica n. sp., MNHN-IM-2013-65647. C, L. Hyalorisia tosaensis, MNHN-IM-2013-58352. D, M. Hyalorisia nupta n. sp., MNHN-IM-2013-68952. E, N. Hyalorisia nanhaiensis n. sp., MNHN-IM-2013-59697. F, O. Hyalorisia kely n. sp., MNHN-IM-2007-38809. G, P. Hyalorisia melanesica n. sp., MNHN-IM-2007-34205. H, Q. Hyalorisia madagascarensis n. sp., MNHN-IM-2007-39090. I, R. Hyalorisia solomonensis n. sp., MNHN-IM-2007-34215. Scale bars = 100 µm.

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.