In the early thirties the late Polish palaeontologist Wilhelm Krach started the publication of a long series of papers on the mollusc faunas and the biostratigraphy of the Tertiary deposits in Poland, predominantly focusing on the Miocene of the Carpathian Foredeep. In several of these papers holoplanktonic molluscs ('pteropods') are mentioned. Gradually Krach realised the potential value of these organisms in regional and interregional biostratigraphy, resulting in a special paper on the subject, published in 1981. In the present paper a substantial part of Krach's pteropod material, housed in the Institute of Geological Sciences at Kraków, is systematically revised and biostratigraphically interpreted according to modern standards and in accordance with research outside Poland.

Scripta Geologica. Special Issue

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Naturalis journals & series

Janssen, A.W, & Zorn, I. (1992). [Proceedings of the symposium 'Molluscan Palaeontology' : 11th International Malacological Congress, Siena (Italy) 30th August - 5th September 1992 / A.W. Janssen and R. Janssen (editors)]: Revision of Middle Miocene holoplanktonic gastropods from Poland, published by the late Wilhelm Krach. Scripta Geologica. Special Issue, 2(9), 155–236.