Abstract
Four bryozoan species are described from the Siliciclastic Imagh Formation of the Carboniferous (Pennsylvanian) succession at the Imagh section, Posht-e-Badam Block, Kalmard area in central Iran. Three species are new: two trepostomes Dyscritella multiporata sp. nov., Dyscritella kalmardensis sp. nov., and a rhabdomesine cryptostome Rhombopora aryani sp. nov. The species Nikiforovella ambigua Xia and Liu (Rhabdomesina, Cryptostomata) was previously recorded from the Pennsylvanian of China. The generic composition is cosmopolitan for the Carboniferous. The studied bryozoan assemblage indicates middle-to-deep shelf environment.
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