“…The lack of such fine sculptural details in the Turkish material may be a result of the poor preservation. A similar species is Plicatiformes fittoni from the Bessarabian of the Rostov region, Russia, which differs in the presence of distinct spikes on the rib-tops (see also Nevesskaya et al, 1993;Paramonova, 1994;Frolov et al, 2020). Earlier identifications as Paradacna abichi can be excluded based on the strongly inequilateral shell of that species (Hoernes, 1874;Nevesskaya et al, 1997).…”