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 “ Savatieria ” chordata Castellanos, Rolán & Bartolotta, 1987 Fig. 4C Savatieria chordata Castellanos et al. , 1987 : 97 , pl. 1, fig. 3; Signorelli et al. , 2015 : 64 , figs. 6C, D ( holotype ) “ Savatieria ” chordata— Di Luca & Pastorino, 2018 : 300 , figs. 6A–F ( paratype , protoconch and radula) Examined material. 5 an. and 3 sh. (MACN-In 40687); holotype and 5 paratypes (MLP-Ma 4688). Description. Shell height to 6.1 mm ; fusiform, moderately solid. Protoconch of 1.75 almost straight whorls, apex deeply sunken (not visible in the figure). Teleoconch of up to 3.75 whorls, slightly convex in outline; last whorl comprising about 50% of total shell height. Suture impressed. Surface pale brown, yellowish at suture and base; sculptured with 14 to 16 strong axial ribs and 4 to 7 narrow, low spiral cords per whorl, which produces small beads at their intersections. An additional, almost smooth and markedly stronger cord appears at sutures. Axial sculpture vanishing at the base, where 6 to 8 lower cords are recognizable. Aperture ovate, interior white; columellar callus moderately thick, slightly expanded on the base; siphonal canal moderately long, somewhat oblique, wide. Operculum ovate, with subterminal nucleus; pale brown, translucent.