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Please note: Entries in the above species list are the original binomina of species according to Carlgren's 1949 catalog. Nomenclatorial inconsistencies need to be resolved in a future revision of this genus (see below).
Containing group: Actinostolidae


Actinostolidae with the body sometimes short, sometimes cup-like, sometimes long, cylindrical. Column usually thick, firm, slightly rugose or almost smooth, or with flat tubercles produced by mesogloeal thickenings. Sphincter comparatively weak, mesogloeal, so that the upper part of the column cannot perfectly cover the tentacles. Tentacles short, the inner considerably longer than the outer, never more numerous than the mesenteries at the base; sometimes with mesogloeal thickening on their aboral sides at the base; outside provided at their tips with microbasic b-mastigophors. Longitudinal muscles of tentacles and radial muscles of oral disc mesogloeal. Two well developed siphonoglyphs. Numerous perfect mesenteries, hexamerously arranged. The two mesenteries in one and the same pair, from the third or the fourth cycle, irregularly arranged but as a rule orientated so that the mesentery which turns its longitudinal muscle towards the nearest mesentery of the preceding cycle is more developed than its partner. Retractors of mesenteries diffuse, parietobasilar and basilar muscles strong. Mesenteries of the two first cycles sterile. Cnidom: spirocysts, basitrichs, microbasic p- and b-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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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

All Rights Reserved.

Citing this page:

Tree of Life Web Project. 2000. Actinostola. Version 01 January 2000 (temporary). http://tolweb.org/Actinostola/18815/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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