Abstract:
Two types of organogenic structures of the Central Uralian Melekhov Horizon (Gzhelian Stage, Upper Carboniferous) contain essentially different schwagerinid assemblages. Owing to the diversity of its surface biotopes, the algal-palaeoaplysinal biohermal massif is characterized by a diversity of genera and ecological groups (nine and three, respectively). The biostromal palaeoaplysinal massif contains a less diverse schwagerinid assemblage (five genera and one ecological group), which formed in uniform biotic and abiotic environments of the massif's smooth surface.
