FIGURE 18 in Morphological revision of the genus Aiptasia and the family Aiptasiidae (Cnidaria, Actiniaria, Metridioidea)

FIGURE 18. Internal anatomy of Bellactis ilkalyseae. A) Cross section of the column at the level of the actinopharynx showing the cycles of mesenteries (indicated by roman numberals between pairs). B) Cross section through a tentacle showing the ectodermal longitudinal musculature; notice zooxanthellae in gastrodermis. C) Cross section through distal column showing the ectodermal longitudinal musculature. D) Detail of a longitudinal section of the proximal end showing the welldeveloped basilar muscles. E) Longitudinal section of the distal column showing weak mesogleal marginal sphincter muscle. Abbreviations: ep, epidermis; ga, gastrodermis; me, mesoglea. Scale bars: A–F, 0.1 mm.