FIGURE 7. Massive trepostome bryozoans from the Khrevitsa Formation. A in Morphological features of Late Ordovician (Sandbian) bryozoans from the basin of Khrevitsa River (north-western Russia) and description of a new species of the genus Prophyllodictya Gorjunova, 1987

FIGURE 7. Massive trepostome bryozoans from the Khrevitsa Formation. A. CNIGR museum №5/13403, Diplotrypa abnormis (Modzalevskaya, 1953), colony exterior on basal side, arrow shows a crinoid segment on which a colony started to grow. B–E. CNIGR museum №4/13403, Diplotrypa abnormis. B. View on basal side with first point of growing (arrow). C. Longitudinal section showing diaphragms in autozooecia (DiA) and mesozooecia (DiM). D. Tangential section. E. Longitudinal section of colony showing a radial budding. F–H. CNIGR museum №7/13403, Monotrypa jewensis Bassler, 1911. F. Longitudinal section. G. Tangential section. H. Longitudinal section.