Octineonidae with flat, broad pedal disc without basilar muscles and conical body, the upper part of which is often raised as a cylinder from a lower one. Column divisible into scapus and scapulus, the former with a cuticle, sometimes incrusted [sic] with sand, as also is the pedal disc. Ectoderm of scapus showing a tendency to reduction in certain places. Sphincter mesogloeal, long. Tentacles few, hexamerously arranged, rather weak, capable of involution. Siphonoglyphs indistinct. Only 8 mesenteries, arranged as the macrocnemes of Edwardsia are perfect, fertile, with filaments, acontia and pinnate circumscribed retractors; the fifth and sixth couples, forming pairs with the lateral macrocnemes, are stronger than the mesenteries of the second cycle but of the same appearence [sic]. Very numerous mesenteries only in the proximal part of the body. Parietobasilar muscles broad but weak, their innermost part forming a fold on the macrocnemes. Cnidom: spirocysts, basitrichs, microbasic p-mastigophors.
O. lindahli (Carpenter) Fowler 1894
O. suecicum Carlgren 1940
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1