Natica pipoca, Simone, 2014
publication ID |
https://doi.org/ 10.5252/z2014n3a2 |
persistent identifier |
https://treatment.plazi.org/id/7C5BCE66-FFD9-1959-8256-D5E09664FB9E |
treatment provided by |
Felipe |
scientific name |
Natica pipoca |
status |
sp. nov. |
Natica pipoca View in CoL n. sp.
( Fig. 9 View FIG F-I)
HOLOTYPE. — MNHN 27156 About MNHN .
PARATYPES. — MNHN 27157, 19 shells, MZSP 105142, 6 shells from type locality.
TYPE LOCALITY. — Brazil. Espírito Santo: off Regência, MD 55 sta. DC87, 19°34’S, 39°42’W, 15 m, 29. V.1987 (coll. Bouchet, Leal & Métivier).
DIAGNOSIS. — Shell c. 2 mm, c. 85% taller than wide. Umbilicus entirely closed by callus. Sculpture lacking, surface glossy, translucent, basic color white, with irregular pale brown chevrons splayed and mostly coalescent. Protoconch dome-shaped, of 1.5 whorls. Operculum smooth, glossy, with low fold in outer edge. Spire angle c. 120°.
DESCRIPTION
Shell ( Fig. 9 View FIG F-H)
Diameter of c. 2 mm; height c. 85% of width; general form globose. Color translucent white in base; irregular pale brown chevrons splayed and mostly coalescent in most area except for peri-umbilical area ( Fig. 9G View FIG ). Protoconch domeshaped, of 1.5 flattened whorls ( Fig. 9H View FIG ); surface smooth, glossy; diameter c. 0.2 mm, occupying c. 10% of upper shell surface. Teleoconch of c. 2.5 whorls; suture planar, weakly marked; spire angle c. 120°. Sculpture absent except for growth lines. Aperture semicircular, wide, occupying c. 74% of shell height and c. 44% of shell width; outer lip thick, weakly prosocline, simple; inner lip slightly concave to almost straight ( Fig. 9F View FIG ), almost entirely covered by thick callus. Umbilicus entirely covered by thick callus, only short lower portion of umbilicus remaining uncovered ( Fig. 9F View FIG ); its aperture occupying c. 15% of lower surface.
Operculum ( Fig. 9F, I View FIG )
Semi-circular, thin, calcareous, occupying entire aperture. Nucleus in middle of inner-lower quadrant; spiral sculpture with 2 barely visible whorls; low undulations parallel to inner edge. Inner surface smooth, glossy; scar elliptical (twice wider than long), closer to inner edge, occupying c. 40% of inner surface.
Measurements (width and height in mm)
Holotype ( Fig. 9H, I View FIG ): 2.1 × 1.8.
Paratype: MZSP 105142: 2.1 × 1.8.
Habitat
15 m depth, muddy bottoms (included living specimens).
Etymology
The specific epithet is a nom in apposition, from the native Tupy word pipoca , meaning cracked skin, an allusion to the appearance of the shell spotted surface.
Natica juani Costa & Pastorino, 2012 View in CoL ( Fig. 10A, B View FIG )
Natica juani Costa & Pastorino, 2012: 30-32 View in CoL , figs 21-28, 30, 37-40.
Natica View in CoL cf. sagrayana – Simone 2011: 167, 269, 276, 283, 290, 297, 304 (non d’Orbigny, 1850).
EXAMINED MATERIAL. — Brazil. Espírito Santo: off Itaúnas , MD55 sta. DC82, 18°56’S, 37°52’W, 85-105 m, 28.V.1987 (coll. Bouchet, Leal & Métivier), MNHN, 2 shells (coll. Bouchet, Leal & Métivier) GoogleMaps ; Trindade Island , MD55 sta. DC59, 20°30’S, 29°18’W, 52-60 m depth, 22.V.1987 (coll. Bouchet, Leal & Métivier), MNHN, 1 shell (coll. Bouchet, Leal & Métivier) GoogleMaps .
REMARKS. — Natica juani has been described including the material examined by Simone (2011), which provisionally determined the samples as N. cf. sagrayana. The known distribution was from Rio de Janeiro to Uruguay ( Costa & Pastorino 2012: 31). The three specimens presently studied are dry, but well-preserved young shells; this indicates low transportation. The two samples expand the known distribution of the species northward, reaching middle Espírito Santo coast, and to east, reaching Trindade oceanic island. The deepest known environment also increases from 65 m to 105 m.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Genus |
Natica pipoca
Simone, Luiz Ricardo L. 2014 |
Natica juani
COSTA P. M. S. & PASTORINO G. 2012: 32 |
Natica
SIMONE L. R. L. 2011: 167 |