Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina Author Baron-Szabo, Rosemarie C. text Zootaxa 2008 2008-12-05 1952 1 244 journal article 1175­5334 Genus Actinacis d’Orbigny, 1849 Type species. Actinacis martiniana d’Orbigny, 1850 , Upper Santonian of France (Figuères) . Diagnosis. Colony plocoid. Colony formation by extracalicinal budding. Corallites are embedded in a reticulate, porous coenosteum. Costosepta have few, but large perforations. Anastomosis present. Septal flanks granular. Wall synapticulothecate, incomplete. Columella parietal or substyliform or formed by elongated segments. No pali. Synapticulae abundant. Endothecal dissepiments sparse. Skeletal microstructure consists of simple and compound trabeculae.