Radianthus Kwietniewski 1897 p. 331

Stoichactiidae with well developed pedal disc. Upper part of the column usually with prominent verrucae, rarely smooth. Sphincter weak, restricted to circumscribed, rarely diffuse. Tentacles rather short or of ordinary length, never papilliform, distributed over the greater part of the oral disc. More than one tentacle communicates with every endocoel or with the older endocoels, but there is only one row on each, and each row consists of more or less numerous tentacles. Rarely the radial arrangement is indistinct. Only one tentacle per exocoel. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal. Oral disc sometimes lobed or broader than the base. Siphonoglyphs and directives variable in number. Mesenteries numerous. All mesenteries, with or without the directives, fertile. Probably more mesenteries distally than proximally (always?). Retractors diffuse, parietobasilar muscles strong. Cnidom: spirocysts, basitrichs, microbasic p-mastigophors.

Species

R. Kuekenthali [sic] Kwietniewski 1896

Bunodes koseiriensis Klunzinger 1877

?Actinia crispus Ehrenberg 1834

Helianthopsis mabrucki Carlgren 1900

Helianthopsis ritteri Kwietniewski 1897

R. lobatus Kwietniewski 1897

Stichodactis papillosa Kwietniewski 1897

?Actinia parvitentaculata Quoy and Gaimard 1833

Discosoma macrodactylus Haddon and Shackleton 1893

Discosoma malu Haddon and Shackleton 1893

Stichodactis glandulosa Lager 1911

Stichodactis kwietniewskii Lager 1911

Antheopsis carlgreni Lager 1911

Antheopsis concinnata Lager 1911

?Myriactis tubicola Haddon 1888

Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1

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