[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     Class Asteroidea Blainville, 1830 - sea stars
       Order Forcipulatida Perrier, 1884
         Family Pedicellasteridae Perrier, 1884
           1 Genus Hydrasterias Sladen, 1889
           2 Genus Pedicellaster Sars, 1861