Order Vespida see Order Hymenoptera Linnaeus, 1758
   Suborder Siricina
     Family Xyelidae Newman, 1834
       Subfamily Xyelinae Newman, 1834
         Genus Xyela Dalman, 1819
           Subgenus †Mesoxyela
             1 †Xyela mesozoica Rasnitsyn, 1965