External and internal morphology of Edwardsianthus sapphirus sp. nov. (CMNH-ZG 09761). A oral view of living specimen in the habitat B outer view of preserved specimen; C. Transverse section of column in upper part D enlarged view of transverse section of parietal muscle E enlarged view of transverse section of retractor muscle F transverse section of ovary G longitudinal section of tentacle H transverse section of tentacle. Abbreviations: a, actinopharynx; fi, filament; me, mesoglea; ne, nemathybome; oo, oocytes; pa, parietal muscle; ph, physa; rm, retractor muscle; scs, scapus; te, tentacle; tlm, tentacular longitudinal muscle. Scale bars: 1 cm (A, B); 500 µm (C–E); 100 µm (F–H).