模式种是研磨彻剪龙(Zapsalis abradens),化石发现于蒙大拿州朱迪思河组(英语:Judith River Formation),地质年龄可以追溯到7500万年前的坎帕阶。恐龙公园组(英语:DinosaurParkFormation)亦发现更多归入彻剪龙的牙齿,年龄也可以追溯到大约7500万前。尽管也在其它不同时期的
of the large-bodied caenagnathid Caenagnathus collinsi from the DinosaurParkFormation of Alberta, Canada. Cretaceous Research. 2015, 54: 179–187. doi:10
161086. Matson, C.C. Paleoenvironments of the Upper Cretaceous DinosaurParkFormation in southern Alberta, Canada (学位论文). University of Calgary, Calgary
Nestling-Size Hadrosaurs (Reptilia:Ornithischia) from Dinosaur Provincial Park (DinosaurParkFormation: Campanian), Alberta, Canada. pp. 206-218. In: Mesozoic