Bathyoncus
Bathyoncus is a genus of ascidian tunicates in the family Styelidae.
Species within the genus Bathyoncus include:Bathyoncus arafurensis Monniot & Monniot, 2003 Bathyoncus herdmani Michaelsen, 1904 Bathyoncus lanatus Monniot & Monniot, 1991 Bathyoncus mirabilis Herdman, 1882 Bathyoncus tantulus Monniot & Monniot, 1991
Species names currently considered to be synonyms:Bathyoncus enderbyanus Michaelsen, 1904: synonym of ''Bathystyeloides enderbyanus''