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 Author ZÁGORŠEK, KAMIL National Museum, Prague, Václavské nám. 68,115 79 Praha 1, Czech Republic kamil_zagorsek@nm.cz text Acta Musei Nationalis Pragae Series B 2010 66 3 - 4 139 255 journal article 10.5281/zenodo.13344847 2533-4069 13344847 Umbonula granulata sp. n. Pl. 95, Fig. 1-6 D i a g n o s i s: Colony encrusting. Autozooecia rhomboidal with granular frontal wall. Marginal areolar pores small, about 10-15 on the border of each autozooecium. Aperture with a large lyrula. Avicularia of two types , small suboral and giant spatulate. No ovicell observed. H o l o t y p e: The specimen illustrated in Pl. 95, Fig. 1 and 4-6, from the section Podbřežice, is deposited in the National Museum Prague under number PM2 – P 01903. P a r a t y p e s: Altogether 4 specimens were studied from the locality Podbřežice , deposited in the National Museum Prague under numbers PM2 – P 01904-P 01907. 148 D e r i v a t i o n o m i n i s: Due to the granular frontal wall. L o c u s t y p i c u s: section Podbřežice, sample Podbřežice village-1. S t r a t u m t y p i c u m: Langhian – Lower Badenian. M e a s u r e m e n t s: (in micro meters = µm; x = = average): length of autozooecia: 499-654; x = 614 width of autozooecia: 333-492; x = 396 length of autozooecial aperture: 152-231; x = 180 width of autozooecial aperture: 157-193; x = 176 length of suboral avicularium: 65-112; x = 85 width of suboral avicularium: 57-85; x = 72 length of spatulate avicularium: 275-299; x = 287 width of spatulate avicularium: 164-197; x = 181 diameter of areolar pore: 20-68; x = 48 D e s c r i p t i o n: Colony encrusting. Autozooecia rhomboidal with flat, granular frontal walls. Granules small, regularly arranged in quincuncial pattern. Marginal areolar pores small, there are about 10-15 pores on the bor- der of each autozooecium. Aperture large, oval with a large lyrula. Adventitious avicularia suboral or spatulate. Suboral avicularia with a pivotal bar (Pl. 95, Fig. 6); they are situat- ed on the middle of the frontal wall, proximally from the aperture, at the top of the umbo. The spatulate avicularia are giant, with an oval rostrum and a pivotal bar (Pl. 95, Fig. 3). No ovicell observed. C o m p a r i s o n: This new species is very similar to Eschara chiragra Manzoni, 1877 in having a granular frontal wall, but it differs in having giant avicularia and encrusting colonies ( Eschara chiragra MANZONI , 1877 forms bilaminar colonies). Umbonula spinosa ( PROCHÁZKA , 1893 ) resembles this new species in having the “spines” similar to granules around the autozooecia. The granules are however much smaller than the tubercles on Umbonula spinosa ( PROCHÁZKA , 1893 ) . There are no ridges on the frontal wall as in Umbonula macrocheila ( REUSS , 1847 ) and the autozooecia in Umbonula granulata sp. n. are of a more rhomboidal shape.