Taxonomic study on the molluscs collected in Marion-Dufresne expedition (MD 55) to SE Brazil: Xenophoridae, Cypraeoidea, mitriforms and Terebridae (Caenogastropoda) Author Simone, Luiz Ricardo L. Author Cunha, Carlo M. Museu de Zoologia da Universidade de São Paulo, caixa postal 42494, 04218 - 970 São Paulo, SP (Brazil) lrsimone @ usp. br lrlsimone @ gmail. com lrsimone@usp.br text Zoosystema 2012 2012-12-31 34 4 745 781 http://dx.doi.org/10.5252/z2012n4a6 journal article 10.5252/z2012n4a6 1638-9387 5166650 857CAD31-66E1-4CEE-AB4D-CCD64541D0EF Turricostellaria jukyry n. sp. ( Fig. 5 G-K) TYPE MATERIAL . — Holotype : Brazil , Espírito Santo , off Itaúnas, continental slope of Abrolhos, 19°01’S , 37°47’W , 1500-1575 m depth, MNHN 25232 ( Fig. 5 G-J) ( MD 55, stn CB 79, Bouchet, Leal & Métivier coll., 28. V .1987 ). Paratype : off Regência, 19°40’S , 37°48’W , 790-940 m depth, MZSP 102858, 1 shell ( Fig. 5K ) (stn CB 77, 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). ETYMOLOGY. — The specific epithet is derived from the word “jukyry” in the native Parintintin language, meaning pale yellow ( Betts 1981 ). DISTRIBUTION. — Off Espírito Santo , Abrolhos continental slope. DIAGNOSIS. — Shell up to 13 mm , elongated (length c. 3 times width). Sculpture axial, sparse, low; shoulder low, away from upper suture. Protoconch pointed, of four whorls. Aperture c. ⅓ shell length. DESCRIPTION Shell: size up to 12.3 mm , outline somewhat turriform; width c. 39% of length. Colour white, in tip or spire and anterior half of body whorl, pale yellow in middle, with no clear limit between pigmentations ( Fig. 5G, H, K ); surface shining. Protoconch pointed and tall, colour pale brown, comprising c. 8% of shell length and c. 12% of shell width; about four rounded, smooth, glossy whorls; suture shallow but clear ( Fig. 5I ); transition with teleoconch clear, arched. Spire c. 65% of shell length; spire angle c. 35°.Teleoconch up to 6.5 whorls; each whorl with wide shoulder located between upper and middle thirds of each whorl, in angle c. 35° in relation to longitudinal shell axis; remaining weakly convex, almost vertical. Sculpture strong axial threads, vertical, from suture to suture, with small node on tip of shoulder; c. 9 in penultimate whorl; interspaces of axial threads roundly concave, with c. 3 times threads width. Anterior region of body whorl lacking spiral threads ( Fig. 5G, H, K ), axial threads disappearing gradually producing smooth, uniform surface. Aperture elliptic, weakly oblique; comprising c. 43% of shell length and c. 35% of shell width. Outer lip simple, rounded, lacking folds. Inner lip weakly concave, with shallow callus, upper third c. 45° in relation to longitudinal shell axis; four oblique folds uniformly distributed in middle region, comprising c. 60% of inner lip area; upper folds larger, diminishing up to inconspicuous fourth fold flanking canal ( Fig. 5H, J ). Canal narrow, somewhat pointed, weakly projected forwards; with c. ½ of aperture width. No umbilicus. MEASUREMENTS (in mm). — Holotype : 12.3 × 5.0; paratype : 7.8 × 3.4. HABITAT. — Sandy-mud bottoms, 790-1575 m depth.