Phylum Mollusca Linnaeus, 1758 - molluscs
Count: [*†*] 8c;49o;641f;6099g; †2f;162g [24 Jan 2022]
   Class Gastropoda Cuvier, 1795 - snails and slugs
  Count: [*] 21o;416f;4650g; †136g [13 Dec 2021]
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
    Count: [*†*] 6o;172f;2489g; †135g [14 Oct 2021]
       Superorder Archaeogastropoda Thiele, 1925
      Count: [*†*] 3o;37f;400g; †25g [28 Jun 2021]
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
        Count: [*†*] 20f;341g; †25g [28 Jun 2021]
           Superfamily Seguenzioidea Verrill, 1884 [monotypic]
          Count: [*] 1f;15g [22 Jun 2021]
             Family Seguenziidae Verrill, 1884
            Count: [*] 15g [22 Jun 2021]
               01 Genus Seguenzia Jeffreys, 1876
              Count: -
               02 Genus Ancistrobasis Dall, 1889
              Count: -
               03 Genus Asthelys Quinn, 1987
              Count: -
               04 Genus Basilissa Watson, 1879
              Count: -
               05 Genus Basilissopsis Dautzenberg & Fischer, 1897
              Count: -
               06 Genus Calliobasis Marshall, 1983
              Count: -
               07 Genus Carenzia Quinn, 1983
              Count: -
               08 Genus Fluxinella Marshall, 1983
              Count: -
               09 Genus Guttula Schepman, 1908
              Count: -
               10 Genus Hadroconus Quinn, 1987
              Count: -
               11 Genus Rotellenzia Quinn, 1987
              Count: -
               12 Genus Seguenziella Marshall, 1983, nom. illeg. see Genus Quinnia Marshall, 1988
              Count: -
               13 Genus Seguenziopsis Marshall, 1983
              Count: -
               14 Genus Thelyssa Bayer, 1971
              Count: -
               15 Genus Thelyssina Marshall, 1983
              Count: -