Reference

Volker Dietze, Günter Schweigert, Gerd Dietl, Wolfgang Auer, Wolfgang Dangelmaier, Roger Furze, Stefan Gräbenstein, Michael Kutz, Elmar Neisser, Erich Schneider, Dietmar Schreiber (2010): Rare Middle Jurassic ammonites of the families Erycitidae, Otoitidae and Stephanoceratidae from southern GermanyZitteliana Serie A50: 71 - 88.

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