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Pserudobiceros gloriosus (flatworm) on Polycarpa aurata (Seasquirt).jpg
Pseudobiceros gloriosus on Polycarpa aurata
Scientific classification e
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Turbellaria
Order: Polycladida
Family: Pseudocerotidae
Genus: Pseudobiceros

Pseudobiceros is a genus of flatworms. Like all flatworms, Pseudobiceros are hermaphrodites. This particular genus engages in penis fencing. When the "winner" touches its penis to the 'skin' of the other, insemination occurs, and the "loser" has to bear the burden of motherhood.[1][2]


According to WoRMS,[3] species include:


  1. ^ Michiels, N.K., and L.J. Newman. (1998). Sex and violence in hermaphrodites. Nature 391:647.
  2. ^ Hermaphrodites duel for manhood, Science News Online. Accessed 14 March 2009.
  3. ^

External links[edit]