basis of recordPolechová, M. (2022). The bivalve fauna from the Letná Formation (Upper Ordovician) of Bohemia: Significance for palaeobiogeography, palaeoecology and diversification of bivalves. <em>Geobios.</em> 70: 55-73., available online athttps://doi.org/10.1016/j.geobios.2021.10.002 page(s): 60 [details] Available for editors