Dain, 1953 Spirillinidae Upper Jurassic Kimmeridgian East European Platform Donbass Mjatliuk identified by scientist 1 / FEU-1010808 | Dain, 1953 Discorbidae Upper Jurassic Oxfordian East European Platform Donbass Mjatliuk identified by scientist 2 / FEU-1010815 |