羽莖瘤
羽茎瘤
是
鸟类
的
次级飞羽
(secondaries)或
初级飞羽
(primaries)通过韧带与骨骼相连接的地方,在相应骨骼上表现为小突起。
參考來源
ScienceDaily (Sep. 20, 2007)
Velociraptor Had Feathers
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