NGT40-2-01
1960
The Middle Ordovician of the Oslo Region, Norway. 11. Pelecypoda.
40
2
81-121

The samples of Middle Ordovician pelecypods from the Oslo Region have been studied and 40 species are distinguished. The majority of them are referred to genera or families only, some are compared to species described from other regions and 7 species are described as new to science. The faunal assemblages, affinities and growth are discussed.