Images of protoconch and radula of Leiostracus obliquus (Reeve, 1849) scanning electron micrograph (SEM) A protoconch showing sculpture B detail of sculpture of the second whorl showing the two sculpture types, first whorl with regular striation and second whorl with oblique irregular striations in the upper part, in the middle and lower part with punctuation aspects C general view of the first tree whorls D general view of the protoconch and first two whorls E general view of the radula showing the teeth arrangement F detail of rachidian teeth and first lateral teeth G detail of eighth and ninth lateral teeth (arrow) showing the transition from lateral to marginal teeth H detail of lateral region. Scale bars: 75 μm (A); 250 μm (B); 100 μm (C, G); 1 µm (D); 200 μm (E); 40 μm (F); 50 μm (H).