TURKISH JOURNAL OF EARTH SCIENCES, vol.16, no.2, pp.225-240, 2007 (SCI-Expanded)
Marine bivalves Septimyalina sublamellosa( Etheridge 1878), Septimyalina lamellosa( de Koninck 1842), Septimyalina minor ( Brown 1841) and Posidonia becheri Bronn, 1828 are described from the Visean-Namurian transition of Zonguldak coal basin, Northwestern Turkey. Macroinvertebrate fossils are rare in the Lower Carboniferous of the Zonguldak coal basin and only a few shallow marine forms of Myalinidae and Posidoniidae families are present. Their palaeobiogeographic distribution delineates a seaway from Britain to the Black Sea coast during the Carboniferous.