Class Choanoflagellatea Cavalier-Smith, 1998
Count: [*] 2o;3f;55g [10 Jan 2016]
   Order Craspedida Cavalier-Smith, 1997 [monotypic]
  Count: [*] 1f;23g [10 Jan 2016]
     Family Salpingoecidae Kent, 1880
    Count: [*] 23g [10 Jan 2016]
       Genus Stylochromonas Lackey, 1940
      Count: -