Hyalorisia neocaledonica Fassio, Bouchet &amp; Oliverio 2020, new species
Creators: name: Fassio, Giulia
name: Russini, Valeria
name: Buge, Barbara
name: Schiaparelli, Stefano
name: Modica, Maria Vittoria
name: Bouchet, Philippe
name: Oliverio, Marco
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha
Capulidae
Hyalorisia
Hyalorisia neocaledonica

description: <i>Hyalorisia neocaledonica</i> Fassio, Bouchet &amp; Oliverio new species MOTU-2 (Figs 3B, 4B, 6D, 7B, K) <i>Type material</i>: Holotype: Lord Howe Rise, W of New Caledonia, KANADEEP 1, Stn CP5000, 23°57 S, 161°47 E, 985– 1,050 m, MNHN-IM-2013-65645 (male?). Eight paratypes: same locality as holotype; MNHN-IM-2013-65642 (female?), MNHN-IM-2013-65643 (female), MNHN-IM-2013-65644 (female?), MNHN-IM-2013-65646 (male), MNHN-IM-2013-65647 (male), MNHN-IM-2013-65865 (female), MNHN-IM-2013-65883 (female?) and MNHN-IM-2013-65909 (male?). <i>Other material examined</i>: MNHN-IM-2007-37029, MNHN-IM-2013-48364, MNHN-IM-2013-48706, MNHN-IM-2013-48842, MNHN-IM-2013-48852, MNHN-IM-2013-65868, MNHN-IM-2013-65869, MNHN-IM-2013-65870, MNHN-IM-2013-65871 and MNHN-IM-2013-65907. <i>Etymology</i>: From the general area of the type locality, New Caledonia. <i>ZooBank registration</i>: urn:lsid:zoobank.org:act: 01FE7631-F5E1-42D6-8B09-8C3DA1BB7627. <i>COI-based diagnosis</i>: Six diagnostic (autapomorphic) positions in alignment: 112(C), 121(G), 364(G), 451(G), 454(G) and 466(G). <i>Shell (data for holotype shown within parentheses)</i>: Size medium to large for genus: length 7.5–17.5 (9.5) mm, width 5.6–10 (7) mm, height 2.32–7.28 (3.04) mm; thin, ellipsoidal, ovoidal or rounded and depressed; white surface with a smooth yellowish periostracum; anterior margin rounded or very slightly angled; protoconch of 1–1.2 (1) whorls, diameter of nucleus 0.1–0.2 (0.2) mm; teleoconch smooth except for distinct commarginal growth ridges; apertural margin thin, interior glossy white; lamella wide, width 0.8–1.64 (1.28) mm. <i>Soft parts (ethanol preserved)</i>: Head, cephalic tentacles, mantle and foot whitish; pseudoproboscis whitish, sometimes with grey speckles along the dorsal margins. <i>Radula</i>: Taenioglossate, 2-1-R-1-2; marginal teeth sickle shaped; lateral teeth triangular, outer and inner edges with few denticles; rachidian tooth triangular, denticulated on both edges. <i>Host</i>: No direct records. One <i>Hyalorisia</i> specimen (MNHN-IM-2007-37029) was found at the same sampling station as a specimen of <i>P. investigatoris</i> (MNHN-IM-2007-37028); note the consecutive registration numbers. <i>Distribution</i>: So far known only from New Caledonia, at depths of 330–1,060 m. <i>Remarks</i>: Grey speckles were observed along the dorsal margins of the pseudoproboscis of 5 of the 19 specimens examined. So far, this is the only species of this genus showing this feature.
description: Published as part of <i>Fassio, Giulia, Russini, Valeria, Buge, Barbara, Schiaparelli, Stefano, Modica, Maria Vittoria, Bouchet, Philippe &amp; 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, pp. 401-421 in Journal of Molluscan Studies (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) 86 (4)</i> on page 414, DOI: 10.1093/mollus/eyaa028, http://zenodo.org/record/4464900