Fig. 3 in Evolution of the claustrum in Cnidaria: comparative anatomy reveals that it is exclusive to some species of Staurozoa and absent in Cubozoa

Fig. 3 General body plan of Manania uchidai (stauromedusa stage). a Preserved specimen; b–i schematic representations of cross-sections through the specified region in a. a Body mainly divided into oral (apical) calyx (cl) and aboral (basal) peduncle (pe); b four septa (sp) with four infundibula (in), and a central gastrovascular cavity (gvc); c lateral septal evaginations (lse), with a double layer of gastrodermis and central mesoglea, which gradually get closer, delimiting the claustra ostia (co); d complete connection of lateral septal evaginations, delimiting the claustra (cs) and four accessory radial pockets (ar); e progressively larg- er infundibula (in), and gastrodermis of adjacent septa getting closer, delimiting the gastric ostia (go); f connection of gastrodermis of adjacent septa (sp), delimiting the valve of gastric ostium (vg), a double layer of gastrodermis with central mesoglea; g, h gradual connection of epidermis of infundibula, delimiting the four main radial pockets (mr) and base of manubrium (mn); i central manubrium (mn) and eight gastric pockets, four accessory radial pockets (external) and four main radial pockets (internal), separated by claustra (cs). Legend: epidermis, black; gastrodermis, red; mesoglea, gray. See Table 2 for additional abbreviations