Mononykus_olecranusPatagopteryx_deferrariisiYungavolucris_brevipedalisLectavis_bretincolaNeuquenornis_volansSoroavisaurus_australisAvisaurus_archibaldiAvisaurus_gloriaeOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Varricchio_et_Chiappe_1995a