Acotylea is a suborder of free-living marine turbellarian flatworms in the order Polycladida.
Description 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 Kaburakia excelsa
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