Turricostellaria apyrahi, Simone & Cunha, 2012

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), Zoosystema 34 (4), pp. 745-781 : 760

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https://doi.org/ 10.5252/z2012n4a6

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scientific name

Turricostellaria apyrahi

n. sp.

Turricostellaria apyrahi n. sp.

( Fig. 5 View FIG 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 View Materials ( Fig. 5 View FIG P-R) ( MD55 , stn CB79 , Bouchet, Leal & Métivier coll., 28.V.1987) GoogleMaps . Paratypes: same data as holotype, MNHN 25238 View Materials , 1 View Materials shell ( Fig. 5 View FIG L-N), MZSP 102862 View Materials , 1 View Materials shell ( Fig. 5O View FIG ). — Off Regência , 19°41’S, 37°48’W, 790-940 m depth, MNHN 25235 View Materials , 1 View Materials shell (stn CB77 , 27.V.1987). — Off Itaúnas, 18°59’S, 37°48’W, 1200 m depth, MZSP 102863 View Materials , 1 View Materials shell (stn CB78 , 27.V.1987) GoogleMaps ; 19°00’S, 37°49’W, 950-1050 m depth, MNHN 25236 View Materials , 1 View Materials shell (stn DC72 , 27.V.1987) GoogleMaps .

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.


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 View FIG ); 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 View FIG ); 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 View FIG ) 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 View FIG ); 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 View FIG ), present in smaller specimens ( Fig.5O View FIG ). 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 View FIG ) 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 View FIG ). 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.


Museum Donaueschingen


The CB Rhizobium Collection