随着热河生物群的发现,人们对于中生代鸟类的认识有了极大的进步。然而,在曾经遥远的冈瓦纳大陆,中生代鸟类化石却十分稀少,且都没有保存下来羽毛的细节。近期,研究者在巴西的早白垩世地层发现了一具连有羽毛的鸟类骨架化石。该化石是迄今发现的最完整的早白垩世冈瓦纳古大陆的鸟类化石标本,其体积与蜂鸟类似,这也是首次在南美洲发现的该类化石。经研究,该化石相 With the discovery of Jehol Biota, great progress has been made in recognizing Mesozoic birds. However, on the remote Gondwana continent, Mesozoic bird fossils are sparsely populated and have no details of their feathers. Recently, researchers found a feathered bird skeleton fossil in the Early Cretaceous strata in Brazil. The fossil is by far the most complete bird specimen of ancient Gondwanaland during the Early Cretaceous. Its size resembles that of hummingbirds, and it is the first such fossil discovered in South America. After research, the fossil facies