OSTEOLOGY AND RELATIONSHIPS OF CHIROSTENOTES-PERGRACILIS (SAURISCHIA, THEROPODA) FROM THE JUDITH RIVER (OLDMAN) FORMATION OF ALBERTA, CANADA
OSTEOLOGY AND RELATIONSHIPS OF CHIROSTENOTES-PERGRACILIS (SAURISCHIA, THEROPODA) FROM THE JUDITH RIVER (OLDMAN) FORMATION OF ALBERTA, CANADA
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DOI：
10.1139/e88-097
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发表时间：
1988-07-01
影响因子：
1.4
通讯作者：
RUSSELL, DA
中科院分区：
文献类型：
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作者：
CURRIE, PJ;RUSSELL, DA
在艾伯塔省恐龙省公园朱迪斯河组发现的一种小型兽脚类动物的部分骨骼显示，纤手龙与“加拿大大拇指动物”是同一种动物，很可能是“似鸟龙美人”。有关骨骼的新信息表明，纤手龙与单足龙和窃蛋龙有着密切的亲缘关系，这些动物都是由恐龙种群进化而来的。粗壮和纤细的体型在艾伯塔省都已知，有人认为它们对应于近颌龙的两个“种”，并代表两性二型性。来自美国蒙大拿州早白垩世的小猎龙可能代表了早期的鱼尾目动物。骨盆腰带和后肢的特化可能预示着涉水习惯。
A partial skeleton of a small theropod found in the Judith River Formation of Dinosaur Provincial Park (Alberta) shows that Chirostenotes pergracilis is the same animal as "Macrophalangia canadensis" and probably "Ornithomimus elegans." New information on the skeleton suggests that Chirostenotes is closely related to Elmisaurus and Oviraptor and that these animals are derived from dromaeosaurid stock. Both robust and gracile forms are known from Alberta, and it is suggested that these correspond to the two "species" of Caenagnathus and represent sexual dimorphism. Microvenator from the Lower Cretaceous of Montana [USA] may represent an early caenagnathid. Specializations in the pelvic girdle and hind limb may indicate wading habits.