Upper Eocene (Priabonian) bryozoans from the Sambia Peninsula of the Kaliningrad Oblast (Russia)

Priabonian (Upper Eocene) bryozoans from two members of the Prussian Formation, Russian Federation) are described here. Due to modes of preservation, which include only undersides of zooidal frontal surfaces, colony molds or basal wall molds, all specimens from the 'Blue Ground', except one specimen belonging to ?Adeonellopsis sp. A, are identified only to the level of the order or the family and are listed in open nomenclature, i.e., Cheilostomatida, Lunulitidae s. str., and Cribrilinidae. The studied bryozoan assemblage of the 'Krant Ground' includes three cyclostomes, Cyclostomatida gen. et sp. indet., Mecynoecia cf. geinitzi, and 'Berenicea' sp., as well as two cheilostomes, i.e., Calpensia cf. polysticha and Lunulites cf. quadrata. All remaining poorly preserved cheilostomes are left in open nomenclature and are tentatively assigned to the genera Lunulites, Adeonellopsis, and Hippomonavella, as well as to the families Onychocellidae and Microporidae. The bryozoan assemblage of the 'Krant Ground' differs from that of the 'Blue Ground' in having the cy & scy;lostome bryozoans, a large variety of the cheilostome bryozoans, but in la & scy;king cribrimorph bryozoans. Bryozoans are uncommon in both assemblages.