Its host is the planarian flatworm. Schistosomiasis (bilharzia) is a parasitic disease caused by the parasitic flatworm trematodes. Pseudobiceros hancockanus is a species of hermaphroditic marine flatworm in the family Pseudocerotidae. Macrostomum lignano is a , hermaphroditic flatworm. "Leucochloridium" is a genus of flatworm (phylum Platyhelminthes) which matures in the intestine of songbirds. Fasciola gigantica is a parasitic flatworm of the class Trematoda, which causes tropical fascioliasis. It is a freshwater fish disease caused by flatworm larvae of the genus "Neascus". The species is a host for the parasitic flatworm, "Phaneropsolus oviforme". Schistosomiasis is named for the genus of parasitic flatworm "Schistosoma", whose name means 'split body'. Unfortunately, possibly due to the flatworm, the native tree-snails also became extinct. One of the most frequent ocean sunfish parasites is the flatworm "Accacoelium contortum". The New Zealand flatworm is considered an invasive species in parts of Europe. Baicalellia daftpunka is a species of rhabdocoel flatworm. The tiger flatworm, "Maritigrella crozieri", also transfers sperm bilaterally. All individuals of the "divided flatworm" have a black body with an orange margin.