New species of the genus Otitoma Jousseaume, 1898 (Pseudomelatomidae, Conoidea) from the Western Pacific Ocean Author Morassi, Mauro 5D8BDDDC-DC68-4562-8962-D382E8FC3A49 Via dei Musei 17, 25121, Brescia, Italy. & Email: mauro. morassi @ gmail. com & urn: lsid: zoobank. org: author: 5 D 8 BDDDC-DC 68 - 4562 - 8962 - D 382 E 8 FC 3 A 49 mauro.morassi@gmail.com Author Nappo, Andrea EC5CEF2D-729D-4CDE-90AE-5954B03BF906 Via S’Arrulloni, 25, 09045, Quartu Sant’Elena (CA), Italy. & Email: nappo. andrea @ gmail. com & urn: lsid: zoobank. org: author: EC 5 CEF 2 D- 729 D- 4 CDE- 90 AE- 5954 B 03 BF 906 nappo.andrea@gmail.com Author Bonfitto, Antonio A66289C2-6314-4D54-89F8-F6249F3ABC4C Department of Biology, Geology and Environmental Sciences (BiGeA), University of Bologna, via Selmi 3, 40126, Bologna, Italy. & urn: lsid: zoobank. org: author: A 66289 C 2 - 6314 - 4 D 54 - 89 F 8 - F 6249 F 3 ABC 4 C & Corresponding author: antonio. bonfitto @ unibo. it antonio.bonfitto@unibo.it text European Journal of Taxonomy 2017 304 1 30 journal article 22163 10.5852/ejt.2017.304 e0f57b53-fede-40d9-94dd-015c5f4a27b5 2118-9773 3825824 297C615F-A7E6-43B4-A0B1-7CA17CFD9CE1 Otitoma nereidum sp. nov. urn:lsid:zoobank.org:act: 27A8D135-5719-42CA-97EE-8218C500D4EB Fig. 6 O–T Etymology The specific epithet refers to the Latin ‘ nereidum ’ (‘of Nereids’, sea nymphs in Greek mythology) and is a noun in apposition. Type material Holotype FIJI ISLANDS : BORDAU 1, Stn DW 1464, 18°09 ′ S , 178°38 ′ W , 285–300 m ( MNHN IM-2000-32611 ). Paratypes FIJI ISLANDS : Paratype 1, MUSORSTOM 10, Stn DW1365, 18°12.7 ′ S , 178°32.4 ′ E , 295–302 m ( MNHN IM- 2000-32612). Paratypes 2 (coated, MZB 60217) and 3–11 ( MNHN IM- 2000-32613), BORDAU 1, Stn DW1494, 18°55 ′ S , 178°29 ′ W , 240–319 m ; paratype 12, BORDAU 1, Stn DW1506, 18°09 ′ S , 178°37 ′ W , 294–300 m ( MNHN IM- 2000-32614); paratype 13, BORDAU 1, Stn DW1498, 18°41 ′ S , 178°28 ′ W , 300–307 m ( MNHN IM- 2000-32615). Additional material examined FIJI ISLANDS : 8 spms, BORDAU 1, Stn DW1464, 18°09 ′ S , 178°38 ′ W , 285–300 m ; 2 spms, BORDAU 1, Stn DW1498, 18°41 ′ S , 178°28 ′ W , 300–307 m ; 1 spm, BORDAU 1, Stn DW1441, 17°10 ′ S , 178°42 ′ W , 306– 320 m . Description Shell fusiform (b/l 0.34–0.40; a/l 0.47–0.55). Teleoconch whorls 4–5 moderately convex, with a rounded to minimally angular shoulder posterior to mid-whorl. Suture shallow, undulating, bordered by a moderately prominent sutural fold with two closely spaced spiral cords. Sutural ramp shallowly concave. Axial sculpture consisting of opisthocline ribs, subequal to narrower in width than intercostal spaces, extending on spire whorls from suture to sutural ramp, distinct on spire whorls, but becoming weaker on last whorl and rapidly fading on base. 14–20 axial ribs on penultimate whorl and 18–25 on last whorl. Spiral sculpture of closely-spaced, strong and narrow spiral cords. Spiral sculpture of first whorl consisting of a sutural fold, followed by 2 cords on sutural ramp and 3 cords below ramp, increasing to 6–7 on later 2 whorls. Spiral cord interspaces sculptured by none to 2–5 secondary spiral threads ( Fig. 6R ). Last whorl with 15–18 spiral cords on base and rostrum. Entire surface covered by coarse axial incremental lines sometimes rendering spiral cords somewhat plicate. Aperture narrow and ovate, constricted at entrance to siphonal canal. Siphonal canal long for genus, not notched terminally. Inner lip with moderately thin callus, parietal region with a pad formed at its junction with outer lip. Outer lip edge sharp, preceded by a wide, low, rounded varix. Stromboid notch moderately deep. Anal sinus moderately deep, apically rounded, and rather asymmetrically U-shaped, with only a weakly constricted entrance. Protoconch papilliform or domed, of 1¾ smooth whorls ( Fig. 6 S–T), diameter 0.76–0.98 mm . Color white with irregular light brown blotches on sub-sutural ramp. Dimensions Holotype : 9.15 × 3.35 mm , aperture height 4.85 mm . Paratype 1: 9.2 × 3.4 mm , aperture length 4.7 mm ; paratype 10 (smallest): 6.6 × 2.6, aperture height 3.3 mm ; paratype 12 (largest): 10.8 × 3.75 mm , aperture height 5.55 mm . Remarks Otitoma nereidum sp. nov. is readily distinguished from its congeners on the basis of a combination of features including protoconch structure (paucispiral and domed), sculpture of the numerous axial ribs incised by strong spiral cords, and the relatively long siphonal canal.