Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Solenogastres Gegenbaur, 1878
     Order Pholidoskepia Salvini-Plawen, 1978
       Family Macellomeniidae Thiele, 1907 [monotypic]
         1 Genus Macellomenia Simroth, 1893