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Foord & Crick |
1897 |
Catalogue of the fossil Cephalopoda in the British Museum (Natural History). Part III, containing the Bactritidae and part of the Suborder Ammonoidea).
pp.I-XXXIII, 1-303, 145 figs., London.
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Wedekind |
1918 |
Die Genera der Palaeoammonoidea (Goniatiten). (Mit Ausschluß der Mimoceratidae, Glyphioceratidae und Prolecanitidae).
Palaeontographica, 62: 85-184, fig.1-54, pl.14-22; Stuttgart.
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