FIGURE 6. Ramose trepostome bryozoans from the Khrevitsa Formation. A–C. CNIGR museum №2/13403, Homotrypa sp. A. Longitudinal section. B. Longitudinal section showing diaphragms in mesozooecia (arrow). C. Tangential section showing mesozooecia (arrow). D, E CNIGR museum №3/13403, Stigmatella cf. claviformis (Ulrich, 1893). D. Longitudinal section. E. Longitudinal section showing acanthostyles (arrow). F, G. CNIGR museum №8/13403, Hallopora gracilens Bassler, 1927. F. Transverse section. G. Longitudinal section showing abundant diaphragms in mesozooecia (arrow). H. CNIGR museum №9/13403, Hallopora gracilens, tangential section showing mesozooecia (arrow).