Asperilla longispina

Asperilla longispina (Rolle, 1861) Plate 2: figs 9–11 2017 Asperilla longispina (Rolle, 1861) – Gründel, Keupp and Lang: 203, pl. 10, figs 11–17 (here more synonymy and chresonymy). Material. 2 specimens, SNSB – BSPG 2016 XXI 1661 –1662. Remarks. The present specimens have fewer spines on the keel (ca. 7) than those reported by Gründel et al. (2017). In addition, the present specimens have more nodes on the spiral cord at the transition from whorl face to base. According to the literature, the base of this species is smooth or has only a single nodular spiral cord close to the spiral cord at the transition to the whorl face (Gründel et al. 2017). However, the present specimen has three distinctly nodular spiral cords on the base, besides the spiral cord at the transition to the whorl face. The meaning of these differences the present material to that reported by Gründel et al. (2017) are difficult to judge without additional well-preserved material. Therefore, we tentatively keep the present specimens under the same species name.