Fig. 9 in Concentrations of juvenile and small adult cephalopods in the Hirnantian cherts (Late Ordovician) of Porkuni, Estonia

Fig. 9. Polished median section of Parvihebetoceras wahli sp. nov., TUG 1227/41, from the Siuge Member, Porkuni, Estonia showing the truncated part of the shell with septum of truncation and fractured outer shell. Note also the siphuncular diaphragm, 0.6 mm adoral of the septum of truncation.