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Although the bryozoological fauna of Galicia (NW Spain) is probably the best known of the whole Iberian Peninsula, and perhaps one of the better known in Europe, new studies continue to provide new knowledge. A new species, Schizotheca galaica sp. nov., is described. Eleven species are newly recorded in Galicia: Aetea longicollis, Parellisina curvirostris, Copidozoum planum, Glabrilaria corbula, Haplopoma sciaphilum, Schizomavella (Schizomavella) mamillata, Fenestrulina asturiasensis, Fenestrulina barrosoi, Buffonellaria muriella, Schizotheca divisa and Dentiporella saldanhai; two of them (B. muriella and S. divisa) are also reported for the first time in Iberian waters; four others (Antarctothoa galaica, F. asturiasensis, F. barrosoi and D. saldanhai) are reported for the first time since their original descriptions, and SEM images of A. longicollis and F. asturiasensis are provided for the first time. Moreover, the range of geographical distribution of some species is expanded: the record of S. divisa is the southernmost to date, while the records of S. mamillata, F. barrosoi and D. saldanhai are the most northerly to date. The presence of other four species in Galician waters is confirmed and we document the permanence and range extension of two species recently introduced into our waters (Tricellaria inopinata and A. galaica). [ABSTRACT FROM AUTHOR]