Acotylea

As currently defined, Acotylea includes polyclads with a Lang's vesicle in the female reproductive system and the male copulatory apparatus directed backwards. When tentacles are present, they are nuchal. The eyespot groups can be nuchal, cerebral, and marginal. == Taxonomy ==

The internal classification of Acotylea has been unstable, with some genera and families constantly changing place as new molecular and morphological data are analyzed. The current classification is presented below: • Superfamily Discoceloidea • Family Discocelidae Laidlaw, 1903 • Family Ilyplanidae Faubel, 1983 • Family Cryptocelidae Laidlaw, 1903 • Family Polyposthiidae Bergendal, 1893 • Superfamily Leptoplanoidea Faubel, 1984 • Family Candimboididae Faubel, 1983 • Family Euplanidae Marcus & Marcus, 1966 • Family Faubelidae Ozdikmen, 2010 • Family Gnesiocerotidae Marcus and Marcus, 1966 • Family Leptoplanidae Stimpson, 1857 • Family Mucroplanidae Faubel, 1983 • Family Notocomplanidae Litvaitis, Bolaños & Quiroga, 2019 • Family Notoplanidae Marcus and Marcus, 1966 • Family Palauidae Faubel, 1983 • Family Pleioplanidae Faubel, 1983 • Family Pseudostylochidae Faubel, 1983 • Family Stylochoplanidae Meixner, 1907 • Superfamily Stylochoidea Stimpson, 1857 • Family Callioplanidae Hyman, 1953 • Family Discoprosthididae Faubel, 1983 • Family Hoploplanidae Stummer-Traunfels, 1933 • Family Idioplanidae Dittmann, Cuadrado, Aguado, Noreña & Egger, 2019 • Family Latocestidae Laidlaw, 1903 • Family Planoceridae Lang, 1884 • Family Plehniidae Bock, 1913 • Family Stylochidae Stimpson, 1857 • Not placed in any Superfamily • Family Anocellidae Quiroga, Bolanos & Litvaitis, 2006 • Family Apidioplanidae Bock, 1926 • Family Didangiidae Faubel, 1983 • Family Enantiidae Graff, 1889 • Family Limnostylochidae Faubel, 1983 • Family Stylochocestidae Bock, 1913 ==See also==