Actinodiscidae with the margin thrown into more ore less quadrangular, definite, short lobes which are strongly thickened in larger individuals and may be continued as ridges on the outer part of the oral disc. Sphincter diffuse, weak. Marginal tentacles absent. Oral disc with robust, radially arranged, plump projections, those belonging to the older endocoels larger than the others which may be small over the younger compartments. In these projections a main-tentacle grows up which is more or less strongly divided into branches a part only of which may reach the surface of the oral disc and forms very small elevations on the projections. Youngest tentacles simple. No siphonoglyphs. One pair of directives (always?). Retractor and parietobasilar muscles weak. Cnidom: holotrichs, (atrichs?), microbasic p- and b-mastigophors. Microbasic p-mastigophors of usual type.
Isaura neglecta Duchassaing and Michelotti 1860
Rhodactis Carlgreni [sic] Watzl 1922
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1