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Containing group: Acontiaria


Carlgren's catalog (1949) recognized one genus of Nemanthidae, Nemanthus, containing three species. The names listed above are the original binomina of these species. Nomenclatorial inconsistencies need to be resolved in a future revision of this genus (see below).


Nemanthidae: Thenaria (Acontiaria) with mesogloeal sphincter. No acontia proper but acontia-like organs attached at the termination of the filaments and not forming any distinct batteries of nematocysts.

Nemanthus: Nemanthidae with wide pedal disc, smooth column and long tentacles considerably fewer than the mesenteries at the base. Sphincter mesogloeal, well developed. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal. Actinopharynx with distinct, fairly broad siphonoglyphs, as a rule 2, but possibly variable in connection with asexual reproduction. Usually 2 pairs of directives. Perfect pairs of mesenteries 6-12, frequently irregularly arranged, so that the one side of the animal has more than the other, sterile. Stronger imperfect mesenteries fertile. Retractors of the mesenteries weak, parietobasilar muscles moderately weak or weak. Acontia-like organs "acontioids", considerably thicker than acontia and containing very few to rather few nematocysts of the same kind as in the filaments, present on at least some of the mesenteries. The individuals often live together in colonies sometimes so closely packed that the edges of their pedal discs touch each other intimately. 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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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

All Rights Reserved.

Citing this page:

Tree of Life Web Project. 2000. Nemanthidae. Version 01 January 2000 (temporary). http://tolweb.org/Nemanthidae/17980/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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