External and internal morphology of Edwardsianthus smaragdus sp. nov. (CMNH-ZG 09762). A outer view of living specimen B outer view of preserved specimen C transverse section of retractor muscle D transverse section of the tentacle E longitudinal section of the tentacle F transverse section of column G enlarged view of transverse section of ovary H transverse section of a nemathybome. Abbreviations: a, actinopharynx; cap, capitulum; fi, filament; ma, macrocneme; me, mesoglea; ne, nemathybomes; ov, ovary; pa, parietal muscle; ph, physa; rm, retractor muscle; scs, scapus; te, tentacle; tcm, tentacular circular muscle; tlm, tentacular longitudinal muscle. Scale bars: 1 cm (A, B); 500 µm in (C–H).