Class Choanoflagellatea Cavalier-Smith, 1998
   Order Acanthoecida Cavalier-Smith, 1997
     Family Stephanoecidae Leadbeater, 2011
       01 Genus Acanthocorbis Hara & Takahashi, 1984
       02 Genus Amoenoscopa Hara & Takahashi, 1987
       03 Genus Apheloecion Thomsen, 1983
       04 Genus Bicosta Leadbeater, 1978
       05 Genus Calliacantha Leadbeater, 1978
       06 Genus Calotheca Thomsen & Moestrup, 1983
       07 Genus Campanoeca Throndsen, 1974
       08 Genus Campyloacantha Hara & Takahashi, 1987
       09 Genus Conion Thomsen, 1982
       10 Genus Cosmoeca Thomsen, 1984
       11 Genus Crinolina Thomsen, 1976
       12 Genus Crucispina Espeland, 1986
       13 Genus Diaphanoeca Ellis, 1930
       14 Genus Didymoeca Doweld, 2003
       15 Genus Kakoeca Buck & Marchant, 1990 [monotypic]
       16 Genus Monocosta Thomsen, 1979
       17 Genus Nanoeca Nitsche, Carr, Arndt & Leadbeater, 2011, nom. null. see Genus Nannoeca H.A. Thomsen, 1988
       18 Genus Parvicorbicula Deflandre, 1960
       19 Genus Platypleura Thomsen, 1983, nom. illeg.
       20 Genus Pleurasiga Schiller, 1925
       21 Genus Polyfibula Manton & Bremer, 1981
       22 Genus Saepicula Leadbeater, 1980
       23 Genus Saroeca Thomsen, 1979
       24 Genus Spinoeca Thomsen, Ostergaard & Hansen, 1995
       25 Genus Spiraloecion Marchant & Perrin, 1986
       26 Genus Stephanacantha Thomsen, 1983
       27 Genus Stephanoecaᵀ Ellis, 1930
       28 Genus Syndetophyllum Thomsen & Moestrup, 1983