TABLE 2 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

TABLE 2. Classification of protective structures in the Khrevitsa bryozoan association based on functional criteria. Functional group (means)StructureGeneraCommentsStrengthening theMesozooeciaHalloporacolony, addition in feeding area by increasing the distance between the autozooecia aperturesHomotrypa Amplexopora StigmatellaSometimes clustering maculaeDiplotrypaAbundant, few typesMesotrypaPrasoporaAbundant, sometimes clustering maculaeTektitozooeciaNematotrypaAbundantExilazooeciaMonotrypaRareDefense against predatorsAcanthostylesAmplexoporaTwo typesHomotrypaAbundantPrasoporaRareMesotrypaStigmatellaNematotrypaDiplotrypaRarePaurostylesNematotrypaProphillodictyaProtection of polypide, attachment for musclesDiaphragmsMonotrypa DiplotrypaRareStigmatellaMesotrypaHalloporaHemiphragmsNematotrypaDiaphragms, cystiphragms, bothAmplexopora HomotrypaPrasopora