[Avialae] Gauthier 1986
   †Alvarezsauridae Bonaparte 1991 [Sereno 1999] see Family Alvarezsauridae Bonaparte, 1991
     1.1.1 Genus †Shuvuuia Chiappe, Norell & Clark, 1998
     1.1.2 Genus †Mononykus Altangerel, Norell, Chiappe & Clark, 1993
     1.2 Genus †Patagonykus Novas, 1996
     2 Genus †Alvarezsaurus Bonaparte, 1991