The case of alleged inversion of septal sutures in ammonites

Authors


Abstract

Reexamination of the specimen of Hystoceroceras varicosum (Sow.) ‘var. angolana’ Haas with allegedly inverted last septal sutures (Haas, 1941) has proved Schindewolf's (1968) assumption to be correct, i.e., the relevant whorl fragment had been inserted inversely during reassembly. The specimen is a nonpathologic adult H. varicosum angolantrm

Ancillary