Sphaerodoridium Luetzen , 1961

Capa, Maria, Osborn, Karen J. & Bakken, Torkild, 2016, Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia, ZooKeys 615, pp. 1-32 : 14-15

Taxon classification Animalia Phyllodocida Sphaerodoridae

Sphaerodoridium Luetzen, 1961

Sphaerodoridium Lützen, 1961: 409-410 (in part), Fauchald 1974: 270, Capa et al. 2014.

Type species.

Sphaerodorum claparedii Greeff, 1866

Diagnosis.

Body short and ellipsoid. Six or more longitudinal rows of macrotubercles on dorsum, in one transversal row per segment. Macrotubercles stalked and smooth, without terminal papilla. Smaller, stalked tubercles on ventrum. Microtubercles absent. Papillae over body surface and parapodia. Prostomial and peristomial appendages digitiform. Parapodia with only compound chaetae; hooks absent.

Remarks.

Capa et al. 2016 recovered Clavodorum nested within Sphaerodoridium , indicating the circumscription of these two genera according to the relative length of the head appendages should be revised.