SOME EARLY CRETACEOUS MARINE AND BRACKISH-WATER GASTROPODS FROM EASTERN HEILONGJIANG PROVINCE

The age of the Upper Yunshan Formation of the Longzhaogou Group, Yunshan area of easthern Heilongjiang Province, was considered to be Upper Jurassic by earlier authors ( Li and Yuan ,1991; Li, 1996; Yu and Zhu,1983). Recently some scientists from Nanjing Institute of Geology and Palaeontology, the Chinese Academy of Science have done much field-work there and got some gastropod specimens from the upper part of the Dajiashan Formation in the Dajiashan area of easthern Heilongjiang Province. The gastropod fossils described in this paper were collected from the Yunshan Formation and Dajiashan areas of easthern Heilongjiang. The fauna consists of 7 species in 4 genera. The specimens from the Yunshan Formation described in this paper are picked out from an old collection of Nanjing Institute of Geology and Paleontology, the Chinese Academy of Science,Nanjing.

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Q915.817.2