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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 with well developed base which is often attached to shells. Column divisible into scapus and scapulus, the former provided with tubercles sometimes showing a tendency to be arranged in rows, more rarely most of the tubercles are reduced so that only a ring of tubercles, coronal tubercles, remain, in the uppermost part of the scapus. In young specimens the tubercles are often small or absent. Scapus usually with a more or less strong cuticle. Sphincter mesogloeal, strong. Tentacles without mesogloeal swellings on their outer sides, not more than 96 (or exceptionally a few more). Same number of mesenteries proximally as distally. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal, the latter sometimes meso-ectodermal. Two well developed siphonoglyphs. 6 pairs of perfect and sterile mesenteries. Retractors 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.

Title Illustrations
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Hormathia digitata (originally described as Actinia digitata).
Photo copyright © 2000, Ron Ates.
Northern North Sea. Collection and donation of this specimen by Prof. N. Daan (RIVO, IJmuiden, Netherlands) is gratefully acknowledged.

Copyright © 2000 Ron Ates
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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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. Hormathia. Version 01 January 2000 (temporary). http://tolweb.org/Hormathia/18119/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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