Turricostellaria amphissa, Simone & Cunha, 2012
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publication ID |
https://doi.org/ 10.5252/z2012n4a6 |
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publication LSID |
lsid:zoobank.org:pub:857CAD31-66E1-4CEE-AB4D-CCD64541D0EF |
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persistent identifier |
https://treatment.plazi.org/id/03AA8317-C645-0D58-FC91-9D70CE400BC8 |
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treatment provided by |
Felipe |
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scientific name |
Turricostellaria amphissa |
| status |
sp. nov. |
Turricostellaria amphissa View in CoL n. sp.
( Fig. 5 View FIG A-D)
TYPE MATERIAL. — Holotype: Brazil, Espírito Santo, off Itaúnas, continental slope of Abrolhos, 18°59’S, 37°50’W, 295 m depth, MNHN 25230 ( Fig.5A View FIG ) ( MD 55, stn DC 75, Bouchet, Leal & Métivier coll., 27. V.1987). Paratypes: same data as holotype, MNHN 25231, 2 shells ( Fig. 5B, C View FIG ), MZSP 102691, 2 shells ( Fig. 5D View FIG ).
TYPE LOCALITY. — Brazil, Espírito Santo, off Itaúnas, continental slope of Abrolhos, 18°59’S, 37°50’W, 295 m depth ( MD 55, stn DC 75).
DISTRIBUTION. — Known only from type locality.
ETYMOLOGY. — The specific epithet refers to the similarity of the species in fashion and size with columbellid genus Amphissa H. & A. Adams, 1853.
DIAGNOSIS. — Shell up to 5 mm, wide (width c. half length). Sculpture axial, strong; shoulder narrow. Protoconch wide, paucispiral.
DESCRIPTION
Shell: size up to 5 mm, outline oval; width c. 48% of length. Colour pure white, translucent. Protoconch mammillate, comprising c. 15% of shell length and c. 35% of shell width; c. 1.5 rounded, smooth, glossy whorls; suture plane ( Fig. 5B, C View FIG ); transition with teleoconch unclear. Spire c. 50% of shell length, spire angle c. 40°. Teleoconch up to three glossy whorls; each whorl with narrow shoulder, remaining weakly convex. Sculpture of strong axial threads, slightly arched, from suture (shoulder) to suture; c. 12 in penultimate whorl; interspaces of axial threads roundly concave, with c. double threads width. Ventral region of body whorl with inferior ⅓ lacking spiral threads ( Fig. 5A, D View FIG ), with axial threads disappearing gradually. Aperture elliptic, weakly oblique; comprising c. 50% of shell length and c. 40% of shell width. Outer lip simple, rounded, lacking folds. Inner lip slightly concave, lacking callus; four oblique folds uniformly distributed in middle region, comprising c. 60% of inner lip area; upper and inferior folds smaller than second and third folds ( Fig. 5A, D View FIG ). Canal narrow, somewhat pointed, slightly projected forwards. No umbilicus.
MEASUREMENTS (in mm). — Holotype: 4.6 × 2.1; paratype MNHN 25231 About MNHN : 4.4 × 2.2; paratype MZSP 102691 View Materials : 3.6 × 1.6.
HABITAT. — Sandy-mud bottoms, 295 m depth.
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.