Arachnopusiidae JULLIEN, 1888

ZÁGORŠEK, KAMIL, 2010, BRYOZOA FROM THE LANGHIAN (MIOCENE) OF THE CZECH REPUBLIC PART II: SYSTEMATIC DESCRIPTION OF THE SUBORDER ASCOPHORA LEVINSEN, 1909 AND PALEOECOLOGICAL RECONSTRUCTION OF THE STUDIED PALEOENVIRONMENT, Acta Musei Nationalis Pragae Series B 66 (3 - 4), pp. 139-255 : 139-255

Family Arachnopusiidae JULLIEN, 1888 Genus Poricella CANU, 1904

Colony encrusting or erect. Autozooecia with umbonuloid frontal wall with numerous marginal areolar pores and large proximal foramen. The foramen often subdivided to the many uncalcified foramina. Apertures large with lateral indentations, often with suboral umbo. Oral spines common. Avicularia interzooidal, large, very common. Ovicell frontal wall imperforate, slightly immersed, not closed by operculum.

R e m a r k s: As already shown by Cook (1977) and Tilbrook et al. (2001) Poricella is a senior synonym of Tre-

141 mogasterina auctt (not Canu, 1911). Therefore all species (apart from type species of Tremogasterina CANU, 1911 ) formerly assigned to Tremogasterina are listed under the Poricella .