查特吉於2015年在其著作《鳥類崛起:2.25億年的進化》(The Rise of Birds: 225 Million Years of Evolution)第二版中創建四翼鳥科(Tetrapterygidae),其中包含曉廷龍、曙光鳥、近鳥龍甚至小盜龍,四者均被提出是鳥翼類演化支的姐妹群。[13]然而該科有效的前提是必須包括四翼鳥屬(Tetrapteryx)——現為鶴屬的次異名,因此四翼鳥科是鶴科的次異名。[14]
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