Fig. 3 in Isoparactis fionae sp. nov. (Cnidaria: Anthozoa: Actiniaria) from Southern Patagonia with a discussion of the family Isanthidae

Fig. 3 Internal anatomy of Isoparactis fionae. sp. nov. a Longitudinal section of distal part of the column showing the mesogleal marginal sphincter muscle. b Cross section at the actinopharynx level showing cycles of mesenteries. c Section of the oral disc showing the ectodermal longitudinal muscles. d Detail of an adherent rugae. e Detail of retractor and parietobasilar muscles (arrows). f Section of a tentacle showing the ectodermal longitudinal muscles. g Longitudinal section of the pedal disc showing the basilar muscles (arrows). Ac, actinopharynx; Ar, adherent rugae; D, directives; Ep, epidermis; Me, mesogloea; Mod, longitudinal muscles of the oral disc; Mt, longitudinal muscles of the tentacle; Rm, retractor muscle; S, siphonoglyph; Sp, sphincter