Globularia? sp.

Plate 8: figs 8, 9

Material.

1 specimen, SNSB-BSPG 2016 XXI 1794.

Description.

Specimen largely preserved as steinkern, 42 mm wide, egg-shaped, much wider than high, low-spired; whorls rapidly increasing, convex, without visible ornament; spire whorls low; sutures shallow but distinct; last whorl large, largely covering previous ones; transition from whorl face to base evenly convex; outer lip of aperture extends far anteriorly, curved asymmetrically, with greatest width low on whorl; outer lip of aperture shows course of growth lines: almost orthocline, opisthocyrt in adapical part of whorl, prosocyrt in abapical part; aperture not exposed.

Remarks.

Neridomus canalifera (Buvignier) sensu Gründel et al. (2016) is significantly wider in relation to the height and the outer lip is not as asymmetrically curved. Neritoma (Neridomus) ovula (Buvignier) sensu Fischer and Weber (1997) is smaller and the last whorl is higher. Nerita neumeyri Zittel, 1873 is higher in relation to its width and the spire is less elevated. The present species could well belong to Neritimorpha, for instance the Palaeozoic / Triassic genus Naticopsis is similar. Specimens with known aperture would be needed for a safer systematic placement.