Serometacoceras incertum Korn & Ghaderi 2025, gen. et comb. nov.

Serometacoceras incertum (Abich, 1878) gen. et comb. nov. Fig. 3D Nautilus incertus Abich, 1878: pl. 4 fig. 3. Pleuronautilus (Pleuronautilus) incertus – Kummel 1953: 36. ? Pleuronautilus incertus – Shimansky 1965b: pl. 15 fig. 3. Remarks Abich (1878: pl. 4 fig. 3) illustrated a small fragment with about 15 mm whorl width in ventral view (Fig. 3D). He called this specimen “ Nautilus incertus ” in the table explanation, but he described it (Abich 1878: 21) only as the second specimen of “ Nautilus Pichleri ” (Fig. 3E). The specimen possesses a flattened venter and bears ventrolateral nodes. A species definition can probably not be based on this specimen. It is not even clear whether Abich had any taxonomic naming of the specimen in mind at all; von Arthaber (1900: 216) already suspected that the term “ incertus ” should only mean “indeterminable”. For this reason, but also because of the small size of Abich’s specimen, a clear species description is not possible. It is also not clear whether the much larger specimen shown by Shimansky (1965b: pl. 15 fig. 3) can be classified as “ incertus ”. The species can therefore only be included with reservations.