Stephenson (1921 p. 541) did not accept the subtribe Thenaria proposed by me, but divided the genera belonging to this group at once into two, Endomyaria and Mesomyaria, the latter including also the genera provided with acontia. As, however, some genera with acontia have no sphincter, it became necessary to set the genera with acontia apart, in a group of equal rank with the Endo- and Mesomyaria (see Stephenson 1935 pp. 28-9). But as I have pointed out several times, it is very doubtful whether the three groups include genera which are always genetically related to each other. For instance the family Aliciidae has certainly nothing to do with the other Endomyaria, but its origin may be found in the subtribe Boloceroidaria. The Mesomyaria also is, to my mind, not a genetically homogenous group, because the mesogloeal sphincter may sometimes have arisen directly from undifferentiated endodermal circular muscles of the column, sometimes from an already differentiated endodermal sphincter. That an endodermal sphincter can in fact become transformed into a more or less mesogloeal one can be seen in Isosisyonis [sic] alba (CARLGREN 1927 p. 54). I have now examined smaller specimens of this species and find that they have an endodermal aggregate sphincter. The Acontiaria also is probably not homogeneous. In support of this opinion the genus Nemanthus gives an instance. At the place where the acontia occur in this genus, organs have appeared which are partly different in structure from acontia. If, therefore, I retain these groups, it is for practical reasons and is only a provisional arrangement.
Carlgren, O. 1949. A Survey of the Ptychodactiaria, Corallimorpharia and Actiniaria. Kungl. Svenska Vetenskapsakadamiens Handlingar, series 4, volume 1, number 1.
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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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
Page copyright © 2000
All Rights Reserved.
Citing this page:
Tree of Life Web Project. 2000. Thenaria. Version 01 January 2000 (temporary). http://tolweb.org/Thenaria/17708/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/