TinamidaeGalliformesArdeidaeCiconiidaeGaviidaeDiomedeidaeHydrobatidaePelecanoididaeProcellariidaeScopidaeBalaenicipitidaePhaethontidaeFregatidaePelecanidaePlotopteridaeSpheniscidaeAnhingidaePhalacrocoracidaeSulidaeOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Mayr_2004b