Fig. 6 in Life strategies and function of dissepiments in rugose coral Catactotoechus instabilis from the Lower Devonian of Morocco

Fig. 6. Schematic drawing showing successive stages of formation of lonsdaleoid dissepiments. A–D. Smaller dissepiment created between septal pockets. E–H. Larger dissepiment created in place with septal pocket, disrupting septal growth. Note hydrostatic pressure (HP) between basal ectoderm and skeletal structures is here responsible for the pushing up the ectoderm and shaping the dissepiment. Morphological nomenclature refers to all figures (A–H).