Leptomaria goldfussi

Leptomaria goldfussi (Sieberer, 1907) Plate 1: figs 12–16 2017 Leptomaria goldfussi (Sieberer, 1907) – Gründel, Keupp and Lang: 177, pl. 2, figs 13–15; pl. 3, figs 1–2 (here more synonymy and chresonymy). 2017 Leptomaria tuberosa sp. nov. – Gründel, Keupp and Lang: 177, pl. 3, figs 3–5. 2017 Leptomaria tuberosa Gründel, Keupp and Lang – Gründel: 27, pl. 3, fig. C. Material. 12 specimens, SNSB – BSPG 2016 XXI 1616 –1627. Description. Shell broadly trochiform, wider than high, with blunt, rounded apex; a specimen is 28 mm high; whorl face of first whorls straight, on late whorl slightly concave adapically and slightly convex abapically; selenizone separates these zones of whorl face; selenizone at about mid-whorl in early whorls, distinctly above mid-whorl in later whorls; earliest recognizable ornament consists of cancellate pattern of weak spiral threads and somewhat strengthened growth lines; spiral threads become stronger forming cords later in ontogeny; ca. 10 cords present on whorl face; growth lines may stay weak throughout ontogeny in some specimens; other specimens have strong, bulgy, prosocline axial ribs that are much broader than their interspaces on adapical portion of whorls; intersections of spiral cords and axial ribs are strongly nodular; subsutural row of nodules strongest; spiral cords strengthened below selenizone, commonly with alternation of strong and weak spiral cords; growth lines in this portion only developed as weak axial ribs; axial ribs crenulate spiral cords at intersections; base anomphalous, flat; transition from whorl face to base at rounded edge without nodes; base covered with numerous spiral cords of somewhat varying strength; strongest spiral cords towards center of base; growth lines on base sickle-shaped, straight near center opisthocyrt towards edge; aperture rounded quadratic, columellar lip somewhat broadened. Remarks. Gründel et al. (2017) discussed the possibility that L. tuberosa Gründel, Keupp & Lang, 2017 is a varity of L. goldfussi. The new material corroborated this assumption and L. tuberosa is now considerd to be a synonym. Differences to Leptomaria sp. are explained below. Laevitomaria? antoniae (Étallon, 1861 in Thurmann and Étallon sensu Gründel et al. 2020 a) has more convex whorls and deeper sutures; it lacks strengthened subsutural axial ribs. Pleurotomaria agassizii Münster, 1844 (in Goldfuss) has distinct subsutural axial ribs and the edge at the transition from whorl face to base bears nodes.