Rhizopoda Dujardin, 1835 - rhizopods see Phylum Cercozoa Cavalier-Smith, 1998
   Class Lobosea (Carpenter, 1861) Cavalier-Smith, 1993 see Subphylum Lobosa Carpenter, 1861
     Subclass Gymnamoebia (Haeckel, 1862) Cavalier-Smith, 1993 see [unranked] Gymnamoebae
       Order Leptomyxida Pussard & Pons, 1976
         Suborder Rhizoflabellina Page, 1987 see Order Leptomyxida Pussard & Pons, 1976
           Family Flabellulidae Bovee, 1970
             Genus [Flabellula] Schaeffer, 1926
               Flabellula calkinsi (Hogue, 1914)