[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Family Rissoidae Gray, 1847
         Genus Pusillina Monterosato, 1884
           Pusillina amblia (Watson, 1886)
           Pusillina benzi (Aradas & Maggiore, 1844)
           Pusillina ehrenbergi (Philippi, 1844)
           Pusillina inconspicua (Alder, 1844)
           Pusillina lineolata (Michaud, 1832)
           Pusillina marginata (Michaud, 1832)
           Pusillina metivieri Bouchet & Warén, 1993
           Pusillina munda (Monterosato, 1884)
           Pusillina philippi (Aradas & Maggiore, 1844)
           Pusillina radiata (Philippi, 1836)
           Pusillina sarsii (Lovén, 1846)
           Pusillina testudae (Verduin, 1979)