Turricostellaria apyrahi Simone & Cunha 2012, n. sp.
Creators: name: Simone, Luiz Ricardo L.
name: Cunha, Carlo M.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Costellariidae
Turricostellaria
Turricostellaria apyrahi

description: Turricostellaria apyrahi n. sp.   
(Fig. 5 L-R)  
TYPE MATERIAL. — Holotype: Brazil, Espírito Santo, off Itaúnas, continental slope of Abrolhos, 19°01’S, 37°47’W, 1500-1575 m depth, MNHN 25234 (Fig. 5 P-R) (MD55, stn CB79, Bouchet, Leal & Métivier coll., 28.V.1987). Paratypes: same data as holotype, MNHN 25238, 1 shell (Fig. 5 L-N), MZSP 102862, 1 shell (Fig. 5O). — Off Regência, 19°41’S, 37°48’W, 790-940 m depth, MNHN 25235, 1 shell (stn CB77, 27.V.1987). — Off Itaúnas, 18°59’S, 37°48’W, 1200 m depth, MZSP 102863, 1 shell (stn CB78, 27.V.1987); 19°00’S, 37°49’W, 950-1050 m depth, MNHN 25236, 1 shell (stn DC72, 27.V.1987).  
TYPE LOCALITY. — Brazil, Espírito Santo, off Itaúnas, continental slope of Abrolhos, 19°01’S, 37°47’W, 1500- 1575 m depth (MD 55, stn CB 79).  
DISTRIBUTION. — Off Espírito Santo, Abrolhos continental slope.  
ETYMOLOGY. — The specific epithet is derived from the word “apyrahi” in the native Parintintin language, meaning a large pumpkin-like fruit (Betts 1981), an allusion to the outline of the shell shape.  
 DIAGNOSIS. — Shell up to 24 mm, elongated (length c. 3 times width). Sculpture axial, sparse, low, disappearing in last whorls; shoulder absent. Protoconch pointed, of three whorls. Aperture c. ⅓ shell length.   
DESCRIPTION  
 Shell: size up to 13.7 mm, outline somewhat turriform; width c. 29% (juvenile) to 35% (large) of length.Colour uniform pale yellow to white (Fig.5M, O, R); surface shining. Protoconch pointed and tall, colour pale brown, comprising c. 5% of shell length and c. 4% of shell width; about three rounded, smooth, glossy whorls; suture shallow but clear (Fig. 5N); transition with teleoconch clear, arched. Spire c. 55% of shell length; spire angle c. 32°. Teleoconch up to eight whorls; each whorl lacking shoulder (Fig. 5O, Q) or having shallow subsutural spiral fold located below superior quarter of each whorl; remaining weakly convex. Sculpture shallow axial threads, almost undulations, vertical, from suture to suture; sculpture disappearing after seven teleoconch whorls (Fig. 5L, M, Q, R); about nine in penultimate whorl; interspaces of axial threads roundly concave, with about twice threads width. Ventral region of body whorl in larger specimens lacking spiral threads (Fig.5L, Q), present in smaller specimens (Fig.5O). Aperture elliptic,weakly oblique; comprising c. 45% of shell length and c. 37% of shell width. Outer lip simple, rounded, relatively thick (Fig. 5L, Q) lacking folds. Inner lip weakly concave, with shallow callus, superior third c. 30° in relation to longitudinal shell axis; four oblique folds uniformly distributed in middle region, comprising c. 70% of inner lip area; upper folds larger, diminishing up to inconspicuous fourth fold flanking canal (Fig. 5L, P, Q). Canal narrow, blunt, slightly projected forwards; with c. 70% of aperture width. No umbilicus.   
MEASUREMENTS (in mm). — Holotype: 23.7 × 8.6; paratype MNHN 25238: 17.9 × 6.3; paratype MZSP 102862: 15.9 × 5.9.  
HABITAT. — Sandy-mud bottoms with organic blocks, 790-1575 m depth.
description: Published as part of Simone, Luiz Ricardo L. & Cunha, Carlo M., 2012, Taxonomic study on the molluscs collected in Marion-Dufresne expedition (MD 55) to SE Brazil: Xenophoridae, Cypraeoidea, mitriforms and Terebridae (Caenogastropoda), pp. 745-781 in Zoosystema 34 (4) on page 760, DOI: 10.5252/z2012n4a6, http://zenodo.org/record/5166650