Pseudobiceros

Pseudobiceros
Pseudobiceros gloriosus on Polycarpa aurata
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Platyhelminthes
Order: Polycladida
Suborder: Cotylea
Family: Pseudocerotidae
Genus: Pseudobiceros
Faubel, 1984

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.