Type-species. Sphaerodorum sphaerulifer Moore, 1909
Diagnosis. Body generally short and ellipsoid, some forms slender. Four or more dorsal longitudinal rows of macrotubercles, in one or several transverse rows per segment. Macrotubercles sessile and smooth, without terminal papillae. Microtubercles absent. Papillae over body surface and parapodia. Head appendages short, spherical or digitiform. Parapodia with compound chaetae; hooks absent.