FIGURE 4. Fatkullina imitata n in Fatkullina imitata n. sp., second species of a unique cheilostome bryozoan genus with reversed-polarity zooidal budding, and new family Fatkullinidae

FIGURE 4. Fatkullina imitata n. sp. A–C, E, F, paratype 1 ZIRAS 2/50662; D, holotype ZIRAS 1/50661. Intracolonial polymorphism. A. Strongly distended zooids in elevated colony center, with proportionally elongated and elevated distal (preoral) frontal wall terminating with conical and bulbous solid umbones (arrowheads). B. Two neighboring zooids, each bearing distal (preoral) conical knob (arrowheads), with lateral boundary occluded by secondary calcification, indicated by enlarged infundibular pseudopores; note minute shortened distal suture line separating preoral areas. C. Two oppositely orientated zooids with strongly swollen frontal shields and orifices shifted to the top of frontal surface. D. Irregularly hexagonal, flattened, uniformly perforated kenozooid with undulating margins, surrounded by six autozooids. E. Colony area comprising mixed kenozooids and autozooids; note irregular shape of flattened kenozooids possessing strongly reduced orificial areas remaining in form of larger frontal pseudopores (left to central kenozooids) or two minor pseudopores (right kenozooid). F. Colony area fully represented by flattened kenozooids with orifices constricted or closed by calcified cylindrical or mammiform projections with tiny circular to slit-like openings at their apices. Scale bars: 0.25 mm.