[BCG07-P04] Devonian ostracods from the Fukuji area, Takayama City, Gifu Prefecture, central Japan
Keywords:Devonian, Hida-Gaien Belt, Fukuji Formation, ostracoda, palaeobiogeography
The Fukuji Formation located in the Fukuji area, Takayama city, Gifu Prefecture, central Japan. Fossiliferous black bedded limestone and gray massive limestone are mainly distributed in this area. These limestones are divided into four lithofacies; coral rudstone, bioclastic pack/wackestone, micrite and peloidal grainstone. Quartz grains are also included in limestones, consequently the Fukuji Formation was deposited under sallow marine near coral reefs along a continental magin. Using the method called Hot-acetolysis, 11 ostracod species belonging to 15 genera are obtained from limestone of the Lower Carbonate Member. Most of the ostracods are classified into Palaeocopida or Podocopida, thus relevant to shallower-water ostracod assemblage. In addition, the ostracods from the Fukuji Formation share species-level links with those of South China and Russia, indicating palaeogeographical relationships with those areas.