Actinodendronidae with the oral disc thrown into long arms, 10-48 in number. Sphincter absent. Tentacles arranged more or less spirally all round the arms, and themselves branched. The tips of the tentacles are provided with long basitrichs forming nematocyst batteries. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal. 2 broad siphonoglyphs, 2 pairs of directives. Mesenteries few, all or almost all perfect. Retractors very strong, diffuse. All mesenteries apart from the directives fertile. Cnidom: spirocysts, basitrichs.
Actinia arboreum Quoy and Gaimard 1833
Actinia alcyonidium Quoy and Gaimard 1833
Acremodactyla ambonense Kwietniewski 1897
A. plumosum Haddon 1898
A. glomeratum Haddon 1898
A. hansingorum Carlgren 1900
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1
Electronic version made possible by NSF grant DEB95-21819 in the PEET program to D. G. Fautin.