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尾综骨先前被认为是胸鸟类的一个独特结构,用来操纵尾羽。发现于窃蛋龙类中的一个相似结构也被认为和鸟类的尾综骨一样,其功能和尾羽有关。我们在这里报道发现于镰刀龙类中的一种似尾综骨结构。虽然这一镰刀龙(北票龙)具
The caudal ulna was previously thought to be a unique structure of the thorax, used to manipulate the tail feather. A similar structure found in the Euphausiaceae is also considered to be the same as the bird’s cauda equina, with its function related to tail feathers. We report here a tailed caudal bone structure found in the genus Halcyon. Although this sickle dragon (North ticket dragon) with