Fig. 5 in Evolution of the claustrum in Cnidaria: comparative anatomy reveals that it is exclusive to some species of Staurozoa and absent in Cubozoa

Fig. 5 Histological sections of Craterolophus convolvulus (from peduncle/calyx connection region moving upward to manubrium region in a–k) showing accessory radial pockets, main radial pockets, and manubrium. a Four interradial septa (sp) at peduncle/calyx connection region; b four septa with lateral septal evaginations (lse) and a central gastrovascular cavity (gvc); c detail of septum (sp) with internal infundibulum (in), and lateral septal evaginations (lse) with a double layer of gastrodermis (gt) and central mesoglea (ms); d– f lateral septal