“…Until recently, most studies on the palaeoecology of Devonian ostracods have been conducted in the continental margins or epicontinental basin context, primarily in Europe and North America (e.g., Bandel & Becker, ; Becker, , , , ; Becker & Bless, ; Casier, , , ; Maillet et al, ), as well as in South China (Wang, , ). Casier (, , ) proposed a novel ostracod assemblage denomination, that is, Eifelian Mega‐Assemblage (=Assemblages 0‐III), Thüringian Mega‐Assemblage (=Assemblage IV), and Myodocopid Mega‐Assemblage (=Assemblage V), which correspond to an environmental gradient from the nearshore to the deep basins.…”