[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Class Aplacophora von Ihering, 1876 - aplacophorans see Phylum Mollusca Linnaeus, 1758
       Family Chaetodermatidae von Ihering, 1786
         Genus Falcidens Salvini-Plawen, 1968
           1 Falcidens aequabilis Salvini-Plawen, 1972
           2 Falcidens crossotus Salvini-Plawen, 1968
           3 Falcidens gutturosus (Kowalevsky, 1901)
           4 Falcidens profundus Salvini-Plawen, 1968
           5 Falcidens sagittiferus Salvini-Plawen, 1968
           6 Falcidens sterreri (Salvini-Plawen, 1967)
           7 Falcidens thorensis Salvini-Plawen, 1971
           8 Falcidens vasconiensis Salvini-Plawen, 1996