[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     Class Echinoidea (Leske, 1778) - sea urchins and sand dollars
       Order Spatangoida L. Agassiz, 1840
         Family Asterostomatidae Pictet, 1857
           1 Genus Palaeotropus Lovén, 1872
           2 Genus Peripatagus Koehler, 1895[1896]