Fig. 6 in Evolution of the claustrum in Cnidaria: comparative anatomy reveals that it is exclusive to some species of Staurozoa and absent in Cubozoa

Fig. 6 General body plan of Carybdea xaymacana (cubopolyp stage). a Preserved specimen; b schematic representation of cross-section through the specified region in a. a Body mainly divided into oral (apical) calyx (cl) and aboral (basal) short peduncle (pe); b central gastrovascular cavity (gvc), without subdivisions. Legend: epidermis, black; gastrodermis, red; mesoglea, gray