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 Antistreptus magellanicus Dall, 1902 Fig. 3I Antistreptus magellanicus Dall, 1902 : 532 ; Dall, 1908 : 315 , pl. 15, fig. 14; Melvill & Standen, 1912 : 128 (synonymy); Linse, 2002 : 98 , pl. 12, figs. 9.1.1-91, 9.1.1-92 (protoconch) Examined material. 10 sh. (MACN-In 40681). Description. Shell height to 4.1 mm (up to 5 mm according to Castellanos 1967 ); sinistral, fusiform, solid. Protoconch narrow, tilted, of 1.5 elongated, smooth whorls. Teleoconch of up to 3.25 whorls, markedly convex in outline; last whorl comprising about 70% of total shell height. Suture deep, impressed. Surface white; sculptured with 11 to 14 strong axial ribs and 2 or 3 spiral cords per whorl, which produce large beads at their intersections; base with 6 to 9 additional cords. Axial sculpture vanishing progressively towards the base. Aperture ovate, interior white; columellar callus thick; siphonal canal moderately long, somewhat oblique, wide.