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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 wide basal disc forming a cuticle which may project beyond the mouth of the shell to which it is fastened. Column divisible into scapus and scapulus, the former smooth or provided in its distal part with a more or less complete corona of tubercles, with a thin, easily deciduous cuticle. Scapulus, at least in the preserved state, with deep longitudinal furrows. Margin distinct, more or less crenulated. Fosse deep, sphincter mesogloeal. Tentacles thin, hexamerously arranged. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal. 2 deep siphonoglyphs. Mesenteries hexamerously arranged, 6 pairs perfect and sterile. About same number of mesenteries distally and proximally. Retractors rather weak to weak, parietobasilar and basilar muscles weak. Acontia thin but long. The species of the genus live in symbiosis with hermit crabs. Their mouth may be situated dorsally as well as ventrally with relation to the mouth of the hermit. Cnidom: spirocysts, basitrichs, microbasic p-mastigophors (the mastigophors in the column too).


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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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. Paracalliactis. Version 01 January 2000 (temporary). http://tolweb.org/Paracalliactis/18122/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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