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(marine biodiversity, shelf, biotic radiation, Late Ordovician, Early Devonian)
atic, and eustatic reconstructions demonstrates thatshelves, which likely provided the main space for biotic radiation, shrank, concentrated in the tropics, andwere better connected in the late Early Devonian than in the

and intrinsic factors should be considered in further discussions.Key words: marine biodiversity, shelf, biotic radiation, Late Ordovician, Early Devonian.Апстракт. После тзв. ”камбријумске експлозије“, морски биодиверзитет