Temporary Page


Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
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. Column smooth, not or only slightly differentiated into scapus (which is often provided with a weak cuticle) and scapulus, often thick, sometimes with numerous ectodermal invaginations, which do not pierce the wall. Cinclides present (always?) in the proximal part of the column. Sphincter strong, mesogloeal. Tentacles rather short, conical, more numerous than the mesenteries at the base, their longitudinal muscles ectodermal. Radial muscles of oral disc more or less embedded in the mesogloea. 2 broad siphonoglyphs. Six pairs of perfect and sterile mesenteries, 2 pairs of directives. Retractors of mesenteries fairly weak, diffuse. Parietobasilar and basilar muscles weak or rather well developed. Often commensal with hermit crabs. 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
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window

Calliactis parasitica was originally described as Actinia parasitica

Scientific Name Calliactis parasitica
Location Madeira Island
Specimen Condition Live Specimen
Identified By Oscar Ocana from collected specimens
Behavior on hermit crab shell
Copyright © Peter Wirtz
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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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. Calliactis. Version 01 January 2000 (temporary). http://tolweb.org/Calliactis/18129/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Branch Page.

Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box


Page Content

articles & notes



Explore Other Groups

random page

  go to the Tree of Life home page