Mecynostomidae

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Phylum: Acoela
Familia: Mecynostomidae
Genera: Limnoposthia - Stylomecynostomum ...

Source: Wikispecies: All text is available under the terms of the GNU Free Documentation License