Kingdom Animalia Linnaeus, 1758 - animals Phylum Echinodermata Bruguière, 1789 - echinoderms Subphylum Eleutherozoa Bell, 1891 Class Asteroidea Blainville, 1830 - sea stars Order Platyasterida Spencer, 1951 Genus Luidia Forbes, 1839 Genus Platyasterias Agassiz, 1846, nom. nud.