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 Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
    Count: [*] 8o;119f;463g [31 Oct 2021]
       Order Nudibranchia Cuvier, 1814 - "true" nudibranchs
      Count: [*] 64f;254g [31 Oct 2021]
         Suborder Arminina Odhner, 1934
        Count: [*] 9f;21g [30 Oct 2021]
           Superfamily Metarminoidea Odhner, 1968, nom. inval.
          Count: [*] 6f;12g [30 Oct 2021]
             Family Madrellidae Preston, 1911
            Count: [*] 2g [30 Oct 2021]
               Genus Madrella Alder & Hancock, 1864
              Count: -