Five bryozoan species are described from the lower part of the Akuyuk section (Late Viséan, Mississippian) in southern Kazakhstan. Thin sectioning and micro-computed tomography have been utilized to study this material in detail. These integrated and complex techniques have a high potential to reveal much detail, although recrystallization and weathering of colonies preclude in depth assessment of all microstructures in detail. The bryozoan assemblage is represented by reticulate (60 %), ramose (20 %) and pinnate (20 %) growth habits. The bryozoan fauna, together with accompanying fossils, and microfacies are characteristic for an environment with a stable substrate subjected to moderate wave energy conditions.