Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity Author Luca, Javier Di Author Zelaya, Diego G. text Zootaxa 2019 2019-01-10 4544 1 41 78 journal article 27685 10.11646/zootaxa.4544.1.2 2f89f82f-be57-45b4-ad3c-ed72a7647551 1175-5326 2618137 211842AA-6C98-425B-9377-1AF0DC78C893 Anatoma conica (d´Orbigny, 1841) Fig. 2C Scissurella conica d´Orbigny, 1841: 470 , pl. 78, figs. 7–9 Scissurella supraplicata — Melvill & Standen, 1912 : 119 ( non Smith, 1875 ). Anatoma conica — Zelaya & Geiger, 2007 : 396 , figs. 1–15 (synonymy and protoconch) Examined material. 1 an. (MACN-In 40662). Description. Shell width to 1.6 mm (up to 1.8 mm according to Zelaya & Geiger 2007 ); trochiform, delicate. Protoconch of 1 convex whorl; apex partially sunken. Teleoconch of up to 2.5 whorls, slightly convex in outline. Suture deep, slightly channeled. Surface white; sculptured with about 25 prosocline, strong axial ribs at penultimate whorl and weak spiral cords. In addition, 2 stronger spiral cords delimiting selenizone. Umbilicus open. Operculum rounded, multispiral; pale brown, translucent.