Parvphylum Sporozoa Leuckart, 1879 see Superclass Sporozoa Leuckart, 1879
   Class Gregarinomorphea Grassé, 1953
     Subclass Orthogregarinia Cavalier-Smith, 2014
       Order Arthrogregarida Cavalier-Smith, 2014
         Suborder Terragregarina Cavalier-Smith, 2014
           Superfamily Gregarinoidea Labbé, 1899
             Family Gregarinidae Labbé, 1899
               Genus Caliculium Wakeman, Reimer, Jenke-Kodama & Leander, 2014