4E) slightly shorter than notopodial postchaetal lobe, bearing two dark glandular ridges but no fimbriation, tapering to a short tip; on posterior abdomen (Fig.
5A); bearing two dark glandular ridges but no fimbriation, compressed and tapering to a slender tip that lacks glandular material; first thoracic pair small, progressively increasing in length (Fig.
Naineris bicornis is the most similar species, and the only differences are the bifid prostomium, the distinct fimbriation of branchiae and a slightly larger number of thoracic chaetigers, about 50, of which 10 form the transition region (Hartman 1951, Taylor 1984).