(1, 2) Parvulatopsis? sp. 1, SNSB–BSPG 2016 XXI 1759, lateral and apical views, width 12 mm. (3) Neridomus hemisphaerica (Roemer, 1836), SNSB–BSPG 2016 XXI 1764, lateral view, width 33 mm. (4, 5) Neridomus hemisphaerica (Roemer, 1836), SNSB–BSPG 2016 XXI 651, lateral views, height 35 mm. (6, 7) Neridomus hemisphaerica (Roemer, 1836) with color pattern, SNSB–BSPG 2016 XXI 1765, lateral and apical views, width 36 mm. (8–12) Neritopsis ? rotundatus sp. nov., holotype, SNSB–BSPG 2016 XXI 1767, (8–10) abapertural, apertural and apical views, width 15 mm, (11) detail in oblique apical view, width 11 mm, (12) basal view, width 15 mm. (13, 14) Wallowiella (Plicaropsis) cancellata (Stahl, 1824) (adult), SNSB–BSPG 2016 XXI 1773, lateral and basal views, width 21 mm.