[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Class Dinophyceae Pascher (1914)
       Subclass Dinophysiphycidae Möhn ex Fensome, F.J.R. Taylor, G. Norris, Sarjeant, Wharton & G.L. Williams (1993)
         Order Dinophysiales Kof. (1926) see Order Dinophysales Er. Lindem. (1928)
           Family Dinophysiaceae Stein (1883) see Family Dinophysaceae F. Stein (1883)
             Genus Ornithocercus F. Stein (1883)
               1 Ornithocercus carolinae Kofoid, 1907
               2 Ornithocercus heteropus Kofoid see Ornithocercus heteroporus Kofoid (1907)
               3 Ornithocercus magnificus Stein (1883)
               4 Ornithocercus quadratus Schütt (1895)
               5 Ornithocercus steini Schütt see Ornithocercus steinii Schütt