New and non-indigenous species of Bryozoa from Iberian waters Author Reverter-Gil, Oscar 001DFC48-0F01-43AF-90EC-452BE6954DDF Museo de Historia Natural da Universidade de Santiago de Compostela, Parque Vista Alegre s / n, 15705 Santiago de Compostela, Spain. oscar.reverter@usc.es Author Souto, Javier E14FC8A9-40B5-4BF6-8551-3F2A1D991463 Institut für Paläontologie, Fakultät für Geowissenschaften, Geographie und Astronomie, Geozentrum, Universität Wien, Josef-Holaubek-Platz 2, 1090 Wien, Austria. javier.souto-derungs@univie.ac.at text European Journal of Taxonomy 2023 2023-07-26 885 33 64 http://dx.doi.org/10.5852/ejt.2023.885.2187 journal article 59553 10.5852/ejt.2023.885.2187 a959a92c-3474-4243-8228-9a9ffb751549 2118-9773 8205406 09B12B7A-5A03-447C-826C-10EA479BCCE5 Genus Arbopercula Nikulina, 2010 Amended diagnosis Colony encrusting, multiserial, unilaminar or multilaminar. Zooids elongated, oval, in serial rows separated by deep groves. Gymnocyst reduced or slightly extended proximally. Mural rim narrow, surrounding an elliptical opesia. Cryptocyst granular, reduced, more developed proximally. Operculum well chitinized. Marginal spines present, but sometimes lacking in large parts of the colony or in the whole colony; sometimes bending across the opesium like a shield, but not fusing. Oral spines absent. A pair of processes, conical or spine-like, developed in the proximal gymnocyst of each zooid, inconstant; a single process in the first zooid of a row after bifurcation. Communication via two multiporous rosette-plates, each situated in one of the basal corners of the distal wall. Distal half of each lateral wall with a single multiporous rosette-plate. Small, irregular kenozooids may be present, filling spaces between autozooids. Ovicell and avicularia absent. Ancestrula and early budding pattern undescribed.