| author | date | title | journal / publication | Hooge MD, Wallberg A, Todt C, Maloy A, Jondelius U, Tyler S | 2007 | abs. | A revision of the systematics of panther worms (Hofstenia spp., Acoela), with notes on color variation and genetic variation within the genus. | Hydrobiologia 592: 439-454 |
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