found in rounded chalk pieces on the Northeastern beach of the island Düne
Helgoland Greater North Sea Germany
Geological Time: Cretaceous Upper Cretaceous
the raw material is collected and the images are made by Dieter Ketelsen as part of the work with Peter Schumacher,
cf. intermedia
The identification is based upon:
Bartenstein, H., 1952: Taxonomische Bemerkungen zu den Ammobaculites, Haplophragmium, Lituola und verwandten Gattungen. (For.) Senckenbergiana 33 Page 313 to 342 Plate 39, Fig. 9-10
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