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Containing group: Thalassianthidae


Medium-sized to very large Thalassianthidae with well developed pedal disc. Upper part of column with verrucae. Sphincter very weak, restricted to circumscribed. Oral disc more or less strongly folded. Endocoelic tentacles short, branched all round in their upper parts, radially arranged on the greater part of the oral disc, and on the oral sides of short, permanent, cyclically arranged lobes. On the aboral sides of the lobes are bunches of grape-like nematospheres. Exocoelic tentacles orally-aborally flattened, branched at the margin. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal. 2 well developed siphonoglyphs and two pairs of directives. Numerous pairs of mesenteries, at least 3 cycles perfect. More mesenteries distally than proximally. Retractors well developed, diffuse, band-like. Parietobasilar muscles weak, basilar muscles well developed. All stronger mesenteries, apart from the directives, fertile. Cnidom: spirocysts, basitrichs, microbasic p-mastigophors.


Carlgren, O. 1949. A Survey of the Ptychodactiaria, Corallimorpharia and Actiniaria. Kungl. Svenska Vetenskapsakadamiens Handlingar, series 4, volume 1, number 1.

About This Page
The information provided on this page is based on Oscar Carlgren's 1949 catalog.
Copyright © 1949 Swedish Academy of Sciences.

Please note that Carlgren's text contains a number of errors, and much of the information is now out of date. An update of the catalog is currently under preparation in Daphne Fautin's laboratory, and the results of this work will be incorporated in future versions of this page.

Keyboarding of Carlgren's catalog was done as part of a project to create an electronic database of the sea anemones of the world, funded by NSF Grant DEB9521819, awarded to Daphne G. Fautin. This grant is in the program Partnerships to Enhance Expertise in Taxonomy (PEET). Susanne Hauswaldt, Katherine Pearson, and April Wakefield-Pagels contributed to the keyboarding effort.

Correspondence regarding this page should be directed to Daphne G. Fautin at

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Citing this page:

Tree of Life Web Project. 2000. Heterodactyla. Version 01 January 2000 (temporary). http://tolweb.org/Heterodactyla/18776/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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