Cornisepta uirapa Simone & Cunha, 2014, new species
| Main Authors: | Simone, Luiz Ricardo L., Cunha, Carlo M. |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2014
|
| Subjects: | |
| Online Access: |
https://zenodo.org/record/6133935 |
Daftar Isi:
- Cornisepta uirapa new species (Figures 1–5) Types. Holotype MNHN 25281. Type locality. Brazil. Espírito Santo; off Regência, continental slope of Abrolhos, 19 ° 40 ’S 37 ° 48 ’W, 790–940 m depth (MD 55, sta. CB 77; Bouchet, Leal & Métivier col, 27 /v/ 1987). Diagnosis. Slightly curved posteriorly. Height ca. 87 % of length. Sculptured by uniformly distributed small pustules arranged in alternate rows, ca. 80 per row (close to aperture). Description. Shell height ca. 5 mm; highly conical, slightly arched posteriorly (Figs 1, 2); height 87 % of length. White, translucent. Apex about equidistant from anterior and posterior margins. Protoconch no longer present. Foramen terminal, elliptical, width ca. 60 % of length; turned dorsal; occupying ca. 2 % of aperture area in dorsal view; edges rather irregular (Fig. 4). Shell increasing in width towards aperture uniformly, gradual; main axis almost vertical; apical angle ca. 35 °, total shell angle ca. 40 °. Outer sculpture uniform rows of small pustules (Figs 1–3), ca. 80 per row close to aperture, slightly intercalated in adjacent rows; this mosaic somewhat regular towards apex, pustules increasing in number from dorsal to ventral; each pustule surrounded by smooth area equivalent to 3 times its width. Aperture in same plane (straight), elliptical, width approximately 72 % of length; edges slightly irregular. Inner surface smooth, glossy (Fig. 5). Septum ca. 1 / 2 shell height; ca. 3 times higher than wide, ventral edge shallowly concave, almost straight, ca. 1 / 2 of aperture width; gradually narrowing up to posterior edge of fissure. Measurements. Holotype: 4.7 by 5.3 mm. Distribution. Only known from type locality. Habitat. Sandy mud bottoms, 790–940 m depth (dead specimen). Material examined. Holotype. Etymology. The specific epithet is derived from the Tupy native language uirapa, meaning arc, arched, in allusion to the arched shape of the shell.
- Published as part of Simone, Luiz Ricardo L. & Cunha, Carlo M., 2014, Taxonomical study on the mollusks collected in Marion-Dufresne (MD 55) and other expeditions to SE Brazil: the Fissurellidae (Mollusca, Vetigastropoda), pp. 437-468 in Zootaxa 3835 (4) on pages 439-441, DOI: 10.11646/zootaxa.3835.4.2, http://zenodo.org/record/249622