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Twenty-one bryozoan species are recorded from the Plio-Pleistocene deep-water marls of the island of Rhodes, Greece. The faunas occur in three sections where they are represented mostly by erect colonial morphotypes belonging to the cyclostomes (11 species) and the cheilostomes (five anascans and five ascophorans). Essentially on the basis of the known bathymétrie distribution of the 19 extant species, a depth of deposition of 200 to 600 m is suggested, with a shallowing occurring towards the top of the sections. This is supported by the other fossils (foraminifera, ostracodes, pteropods and trace fossils) found in the same beds. Introduction of bathyal bryozoans from the Atlantic during the late Neogene is also considered.

The first mention of bryozoans from the Plio-Pleistocene of Rhodes was by Hedenborg (1837), who gave a list of six bryozoans (mostly determined only to genus level) under the heading …