Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
           Superfamily Trochoidea Rafinesque, 1815
             Family Turbinidae Rafinesque, 1815 - turban snails
               Subfamily Turbininae Rafinesque, 1815
                 Genus Astralium Link, 1807
                   1 Subgenus Bellastraea Iredale, 1924
                   2 Subgenus Calcar Montfort, 1810
                   3 Subgenus Cyclocantha Swainson, 1840
                   4 Subgenus Distellifer Iredale, 1937
                   5 Subgenus Micrastraea Cotton, 1939
                   6 Subgenus Pagocalcar Iredale, 1937
                   7 Subgenus Rugocalcar Millard, 1996, orth. inval. see Subgenus Rugastella Iredale, 1937
                   8 Subgenus Stella Herrmannsenn, 1849