A generic homonym concerning chordeumatid millipedes (Arthropoda: Diplopoda) and ophellid worms (Annelida: Polycheata) Author Brewer, Michael S. Author Sierwald, Petra Author Bond, Jason E. text Zootaxa 2011 2744 65 68 journal article 10.5281/zenodo.206684 fe0f30fd-0214-4437-8ea2-cd5d02e4192d 1175-5326 206684 Genus Euzonus Grube, 1866 Euzonus Grube, 1866 : 43 , 64. Type species: Euzonus arcticus , by original designation. Preoccupied by Euzonus Menge, 1854 : 14 (Diplopoda, Chordeumatida ) Thoracophelia Ehlers, 1897 : 7 , 101. Type species: Thoracophelia furcifera Ehlers, 1897 , by original designation; considered a subgenus of Euzonus Grube, 1866 by Hartman (1956: 293) . Pectinophelia Hartman, 1938 : 108 . Type species: Pectinophelia dillonensis Hartman, 1938 , by original designation. Junior subjective synonym of Euzonus Grube, 1866 according to Hartman (1959: 434) . Hartman (1938: 103) described the genus Pectinophelia and listed distinguishing characters between the genera Pectinophelia and Thoracophelia . Hartman (1944) considered both genera closely related. The polychaete genus Thoracophelia Ehlers, 1897 was treated as a subgenus of Euzonus Grube, 1866 by Hartman (1956: 293) who cited distinguishing features between members of the subgenera Thoracophelia and ‘ Euzonus sensu stricu . ’ Later, Hartman (1959: 434) synonymized Pectinophelia under ‘ Euzonus .’ In subsequent publications, the subgeneric structure of Euzonus Grube, 1866 was mostly maintained (e.g. Hartman 1966 : 51, 1967: 137 and Rozbaczylo & Zamorano 1970 ) but not always (e.g. Blake 2000 ; Misaka & Sato 2003 ; and Hartmann-Schröder 1971 : 383 who placed the genera Euzonus and Ophelia Savigny, 1818 in the then new subfamily Opheliinae without any reference to the subgenus Thoracophelia ). In a subsequent publication, Hartmann-Schröder & Parker (1995: 2) refer to the subgenus again. Currently, 15 species are placed in Euzonus Grube, 1866 ( Fauchald & Bellan 2009 ) : Subgenus Euzonus (Euzonus) Euzonus (Euzonus) dillonensis ( Hartman, 1938 ) Subgenus Euzonus (Thoracophelia) Euzonus (Thoracophelia) furcifera ( Ehlers, 1897 ) Euzonus (Thoracophelia) heterocirrus Rozbaczylo & Zamorano, 1970 Euzonus (Thoracophelia) mucronata ( Treadwell, 1914 ) Euzonus (Thoracophelia) profundus Hartman, 1967 Euzonus (Thoracophelia) williamsi ( Hartman, 1938 ) Euzonus arcticus Grube, 1866 Euzonus ezoensis ( Okuda, 1936 ) Euzonus flabelligerus ( Ziegelmeier, 1955 ) Euzonus japonicus Misaka & Sato, 2003 Euzonus mammillatus Santos, Nonato & Petersen, 2004 Euzonus otagoensis Probert, 1976 Euzonus papillatus Santos, Nonato & Petersen, 2004 Euzonus zeidleri Hartmann-Schröder & Parker, 1995