Opis

Very short, straight, compressed shell with very large-sized protoconch (or truncation septum?), and cameral deposits with radial microstructure.

Synonimy

Zasięg czasowy

Literatura

Dzik, J. 1984. Phylogeny of the Nautiloidea. Palaeontologia Polonica 45, 1-255.

Turek, V. & Manda, Š. 2012. “An endocochleate experiment” in the Silurian straight-shelled cephalopod Sphooceras. Bulletin of Geosciences 87, 767–813.