Parent taxon: Annelida according to R. S. K. Barnes 1998
See also Martin 1904, Sepkoski 2002 and Zrzavy et al. 1998
Sister taxa: Amphinomea, Aphanoneura, Burgessochaeta, Canadia, Chaetopoda, Clitellata, Ctenoscolex, Eunicea, Insolicorypha, Machaeridia, Myzostomaria, Peronochaeta, Skolekichnus, Stephanoscolex, Thartharella, Tubulostium, Vermiforafacta
Subtaxa: Aciculata Aeolosomatidae Amphinomorpha Arachnostega Bundenbachochaeta Campylites Caprascolex Drilomorpha Ebetallites Eopolychaetus Eotrophonia Eunicemorpha Flabelligerimorpha Geophilus proavus Haileyia Hammatopsis Hesionites Hirudopsis Khemisina Klakesia Lockportia Microtubus Nawnites Oliveirania Palaeotubus Palpata Parergodrilidae Phragmochaetidae Phyllodocemorpha Pontobdellopsis Potamodrilidae Propolynoe Psammodrilidae Pyllodocida Ramesses Ruedemannella Sarcionata Schizoproboscina Scolecida Sedentaria Sedentarida Serpulimorpha Siboglinidae Soris Spiomorpha Spiroglyphus Stoma Terebellomorpha Tosalorbis Tubicola Tubulelloides Tymbochoos
Ecology: epifaunal detritivore