Microlinices gaiophanis, Simone, 2014

Simone, Luiz Ricardo L., 2014, Taxonomic study on the molluscs collected during the Marion-Dufresne expedition (MD 55) off SE Brazil: the Naticidae (Mollusca: Caenogastropoda), Zoosystema 36 (3), pp. 563-593 : 580-582

publication ID

https://doi.org/ 10.5252/z2014n3a2

persistent identifier

https://treatment.plazi.org/id/7C5BCE66-FFDB-195D-83F6-D39C96B7FD1D

treatment provided by

Felipe

scientific name

Microlinices gaiophanis
status

n. gen., n. sp.

Microlinices gaiophanis View in CoL n. gen., n. sp. ( Fig. 8 View FIG H-K)

HOLOTYPE. — MNHN 27152 View Materials .

Paratype. — MZSP 105127, 1 shell from type locality.

TYPE LOCALITY. — Brazil. Rio de Janeiro: off Araruama, MD 55 sta. CB 106, 23°54’S, 42°10’W, 830 m, 02. VI.1987 (coll. Bouchet, Leal & Métivier).

DIAGNOSIS. — Shell c. 6 mm, c. 115% taller than wide. Umbilicus open, wide, upper region covered by thick callus, inner middle fold wanting. Sculpture lacking, surface shining, pale brown. Protoconch blunt, of 1 whorl. Spire angle c. 90°.

DESCRIPTION

Shell ( Fig. 8 View FIG H-K)

Diameter of c. 5 mm; height c. 115% of width; general form turbiform. Color pale brown, slightly darker close to upper suture. Protoconch blunt, of 1 rounded whorl ( Fig. 8I, K View FIG ); surface smooth, shining; diameter c. 0.6 mm, occupying c. 12% of upper shell surface. Teleoconch of c. 2.5 whorls; suture well marked; spire angle c. 90° ( Fig. 8H, J View FIG ). Sculpture absent except for growth lines and axial sparse strong undulations; undulations slightly stronger in umbilicus. Suture well-marked, subsutural low shoulder at angle of c. 110° ( Fig. 8I, J View FIG ). Aperture semicircular, narrow, occupying c. 62% of shell height and c. 45% of shell width; outer lip thick, weakly prosocline ( Fig. 8J View FIG ), simple; inner lip slightly concave to almost straight ( Fig. 8H View FIG ), upper half covered by callus, slightly wider than lower half. Umbilicus lacking middle fold, wide, open; c. 1/2 covered by callus with straight, vertical edge; its aperture occupying c. 10% of lower surface.

Measurements (width and height in mm)

Holotype ( Fig. 8 View FIG H-K): 5.2 × 6.1.

Paratype: MZSP 105127: 5.0 × 5.6.

Habitat

830 m depth, muddy bottoms (no living specimens).

Etymology

The specific epithet is derived from the Greek word gaiophanes, meaning earth-colored, an allusion to the brownish color of the shell.

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

MD

Museum Donaueschingen

CB

The CB Rhizobium Collection

VI

Mykotektet, National Veterinary Institute

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