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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: Hormathiidae


Hormathiidae either with a flat adherent pedal disc or with a cup-like base which encloses a cavity full of mud or foreign matter such as small stones. Column usually elongate divisible into scapus and scapulus, the former tuberculate and provided with a weaker or stronger cuticle. Arrangement of the tubercles variable, sometimes they show a tendency to form longitudinal rows. Coronal tubercles mostly 12 or a multiple of 12, sometimes merging into ridges of the scapulus. Scapulus usually with 12 ridges, which are sometimes broken up into tubercles. No cinclides. Sphincter strong, mesogloeal. Tentacles 96 in number or a few more, hexamerously arranged. All the tentacles or at least some of them more or less distinctly thickened on the aboral side at the base. Longitudinal muscles of tentacles ectodermal, radial muscles of oral disc ectodermal or more or less mesogloeal, not decidedly stronger over the exocoels than over the older endocoels. 2 well developed siphonoglyphs. Pairs of mesenteries 48 or a few more, 2 pairs of directives. Six pairs of perfect and sterile mesenteries. No more mesenteries distally than proximally. Retractors of mesenteries as a rule diffuse. 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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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. Actinauge. Version 01 January 2000 (temporary). http://tolweb.org/Actinauge/18120/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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