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, sp. nov., is described. Eleven species are newly recorded in Galicia: () and ; two of them ( and ) are also reported for the first time in Iberian waters; four others ( and ) are reported for the first time since their original descriptions, and SEM images of and are provided for the first time. Moreover, the range of geographical distribution of some species is expanded: the record of is the southernmost to date, while the records of and 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 ( and ). urn:lsid:zoobank.org:pub:F8D0ABEF-026E-4FC8-A947-6484249519FA.