Miocene Bivalves near Bern. Description, comparison and distribution of the bivalves from the Belpbergschichten (Upper Marine Molasse, middle Burdigalian) in the surroundings of Bern, Switzerland. Part 2: Ostreacea, Heterodonta pro parte (Lucinacea, Chamacea, Carditacea and Cardiacea)

The rich and diverse macrofauna of the Belpbergschichten (upper part of the Upper Marine Molasse, Middle Burdigalian) in the south and west of Bern, S witzerland, is subject of new investigations. In the first part, published in Eclogae geol. Helv. 87/3 (1994), a review of the paleontology of the inv ertebrates allready known and of the geology of the area of investigation i s given and the description of 23 species of bivalves (Palaeotaxodonta and Pteriomorphia, except Ostreacea). In this second part the Ostreacea, Lucina cea, Chamacea, Carditacea and Cardiacea are described, figured and compared with other species. The provenance and abundance of the species in the Bel pbergschichten and the distribution (according to the list of synonyms) in the Paratethys and Tethys are given. Totally 14 spieces are described, two are new species: Megacardita guenterti und Acanthocardia steiningeri.