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IRMNG source details
Abh. Math.-Naturw. Kl. Akad. Wiss. Mainz 1968
6450
Publication
Date action by
Akrosphaerorthoceras Ristedt, 1968 (original description)
Hemicosmorthoceras Ristedt, 1969 † (original description) Merocycloceras Ristedt, 1969 (original description) Parasphaerorthoceras Ristedt, 1969 † (original description) Psilorthoceras Ristedt, 1969 (original description) |
