Edwardsiidae with the column divisible into capitulum, scapulus and scapus. Proximal part of the body rounded and, as the other part of the scapus, provided with nemathybomes. Nemathybomes scattered or arranged in several lines. Scapus with a more or less well-developed cuticle. Nematocysts in the cuticle-lacking ectoderm small. Tentacles 16 or more. Siphonoglyph ventral, feebly developed. Mesenteries, retractors and parietal muscles as in Edwardsia. Ciliated tracts of the filaments may be discontinuous. Cnidom: spirocysts, basitrichs, microbasic b- and p-mastigophors.
I. ingolfi Carlgren 1921
I. nidarosiensis Carlgren 1942
I. mediterranea Carlgren 1931
?Edwardsia lucifuga Fischer 1888
I. curacaoensis Pax 1924
I. ignota Carlgren 1920 [sic]
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1
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