Figures 19–28 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil

Figures 19–28. Megaspira adenticulata sp. nov.: (19–21) shell of young specimen in SEM showing the absence of apertural lamellae and detail of the microsculpture of the teleoconch: (22–24) detail of microsculptura of columela in SEM showing small papillae on the entire surface; (25) jaw; (26–28) detail of radula showing the rachidian, lateral and marginal tooth. Scale bars: 19, 20, 22 = 1 mm; 21, 24 = 200 µm; 24, 26, 28 = 20 µm; 25 = 100 µm; 27 = 10 µm.