破碎龍的化石首先於美國堪薩斯州的斯莫基希爾河附近被發現,其化石包括部份的頭顱骨碎片。原先於1872年,奧塞內爾·查利斯·馬什(Othniel Charles Marsh)將牠命名為敏捷鴨嘴龍(Hadrosaurus agilis)[2]。直至1890年發現了牠與鴨嘴龍的主要差異後,才建立了破碎龍屬(Claosaurus)。
^OC Marsh. Notice of a new species of Hadrosaurus. American Journal of Science. Series 3. 1872, 16: 301p.
^ 3.03.1Horner, John R.; Weishampel, David B.; and Forster, Catherine A. Hadrosauridae. Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.) (编). The Dinosauria 2nd. Berkeley: University of California Press. 2004: 438–463. ISBN 0-520-24209-2.引文使用过时参数coauthors (帮助)
^Gregory, Joseph T. The type of Claosaurus (?) affinis Wieland. American Journal of Science. 1948, 246: 29–30.
^Creisler, Benjamin S. Deciphering duckbills: a history in nomenclature. Carpenter, Kenneth (ed.) (编). Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs. Bloomington and Indianapolis: Indiana University Press. 2007: 185–210. ISBN 0-253-34817-X.