New species of Sarmatian Bryozoa Celleporina dubovaensis sp. n. has been found in the section Dubová (Slovakia) and described in details. The new species differs from all other known species of Celleporina having combination of thick radial ribs in the perforated
area of the ovicells, only one suboral avicularium per zooecium and rare, very large vicarious avicularia.
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