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 Onoba fuegoensis ( Strebel, 1908 ) Fig. 3G Rissoa ( Cingula ?) fuegoensis Strebel, 1908 : 56 , pl. 6, figs. 90a, b Rissoa ( Onoba ) fuegoensis — Melvill & Standen, 1912 : 124 Onoba fuegoensis — Ponder & Worsfold, 1994 : 43 , figs. 23e, f, 24a–c, 30 (protoconch and radula) Examined material. 2 an. and 9 sh. (MACN-In 40672). Description. Shell height to 2.5 mm (up to 3.05 mm according to Ponder & Worsfold 1994 ); elongate-conical, moderately solid. Protoconch large, of 1.75 convex whorls, microscopically sculptured. Teleoconch of up to 3.5 whorls, markedly convex in outline; last whorl comprising about 55% of total shell height. Suture impressed. Surface whitish, translucent in well preserved specimens; sculptured with 3 to 5 primary spiral cords per whorl, and 5 or 6 additional cords at the base; interspaces with delicate spiral threads. Aperture ovate, laterally expanded towards the base, interior white; columellar callus moderately thick, slightly reflected. Operculum ovate, paucispiral; yellowish, translucent.