Otitoma nereidum Morassi & Nappo & Bonfitto 2017, sp. nov.
Creators: name: Morassi, Mauro
name: Nappo, Andrea
name: Bonfitto, Antonio
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Turridae
Otitoma
Otitoma nereidum

description: 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.
description: Published as part of Morassi, Mauro, Nappo, Andrea & Bonfitto, Antonio, 2017, New species of the genus Otitoma Jousseaume, 1898 (Pseudomelatomidae, Conoidea) from the Western Pacific Ocean, pp. 1-30 in European Journal of Taxonomy 304 on pages 25-26, DOI: 10.5852/ejt.2017.304, http://zenodo.org/record/3825824