Nine species of freshwater bryozoans were recorded in Lithuania in a survey of 18 various types of freshwater bodies. Eight species were assigned to the Class Phylactolaemata and families Plumatellidae and Cristatellidae ( Plumatellarepens , Plumatellafungosa , Plumatellafruticosa , Plumatellacasmiana , Plumatellaemarginata , Plumatellageimermassardi , Hyalinellapunctata and Cristatellamucedo ). The ninth species, Paludicellaarticulata , represented the Class Gymnolaemata. Plumatellageimermassardi and P.casmiana were recorded for the first time in Lithuania. For the plumatellids, species identification was achieved partly by analysing statoblasts’ morphological ultrastructures by scanning electron microscopy.
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Šatkauskienė et al. (2018) studied this question.