Synopsis of the Late Miocene mollusc fauna of the classical sections Richardhof and Eichkogel in the Vienna Basin (Austria, Pannonian, MN 9-MN 11)

Abstract

The Eichkogel and Richardhof sections represent two important reference faunas for the reconstruction of the Late Miocene continental mollusc faunas. New investigations with strong focus on the micro-vertebrate assemblages of the Pannonian in the Vienna Basin by G. D AXNERHOCK (NHMW) allow a rather precise dating of the Vallesian to Early Turolian faunas into the mammal zones MN 9 (samples Richardhof RH A/2, RH A/7), MN 10 (samples Richardhof Rh 1, Rh 3, Rh 5) and MN 11 (Eichkogel). The increase in material and the improved stratigraphic resolution of the formerly intermingled faunas - aside from the fact that the already published taxa are partly hidden in various papers dealing with special taxonomic problems - motivated us to produce a critical synopsis of the knowledge of these faunas. For the first time, the protoconch features are also documented for many of the discussed species. In total, 84 mollusc taxa are known from the sections. Of these, 71 are recorded from the Eichkogel section and 58 from the Richardhof section. Pseudamnicola hoeckae nov. sp., Granaria moedlingensis nov. sp., Janulus