Sigmesalia sp. (non in Paratethys)

Turritella acuta Mayer, 1858 — Höltke, 2009: 83, figs 27a–27b [non Turritella acuta Mayer, 1858].

Discussion. Höltke (2009) reported Turritella acuta Mayer from the early Miocene of Ermingen (Germany). Turritella acuta was originally described by Mayer (1858: 298, pl. 11, fig. 7) from the Burdigalian of Léognan in France. Mayer (1858) described a small and slender shell with wide-spaced narrow primaries and weak secondary spiral cords (see specimen illustrated by Cossmann & Peyrot 1922: https://science.mnhn.fr/taxon/species/turritella/ acuta).

We have studied four specimens from the Naturkunde Museum Stuttgart (Germany), which Höltke (2009) had at hand, and these undoubtedly represent Sigmesalia Finlay & Marwick, 1937 (type species: Turritella sulcata Lamarck, 1822). The genus is characterized by a very wide lateral sinus and a markedly prosocyrt basal sinus (Marwick 1957) (Fig 6O) and did not pass the Paleogene/Neogene boundary. Based on the preservation and some attached sediment, the specimens derive most probably from the Eocene of the Paris Basin.