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Siphonactinopsis laevis Carlgren 1921

Containing group: Halcampoididae


Halcampoididae with the proximal end rounded. Body cylindrical of considerable length, not divisible into regions, smooth without tenaculi. No sphincter. Tentacles short, conical 40 in number, not bulbously swollen at the apex, the inner tentacles longer than the outer ones. A single, ventral siphonoglyph. Pairs of mesenteries 20 (10+10) all perfect and fertile. Retractors diffuse, band-like. Parietal muscles slightly differentiated. Cnidom: spirocysts (long), basitrichs, microbasic p-mastigophors.

Other Names for Siphonactinopsis laevis Carlgren 1921


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Please note that Carlgren's text contains a number of errors, and much of the information is now out of date.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. Siphonactinopsis. Siphonactinopsis laevis Carlgren 1921. Version 01 January 2000 (temporary). http://tolweb.org/Siphonactinopsis_laevis/17871/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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