Parvphylum Sporozoa Leuckart, 1879 see Superclass Sporozoa Leuckart, 1879
   Class Gregarinomorphea Grassé, 1953
     Subclass Orthogregarinia Cavalier-Smith, 2014
       Order Arthrogregarida Cavalier-Smith, 2014
         Suborder Porosporina Cavalier-Smith, 2014 [monotypic]
           Superfamily Porosporoidea Labbé, 1899
             Family Porosporidae Labbé, 1899
               Genus Thiriotia Desportes, Vivares & Théodoridès, 1977