sinornis   (TTS Sound)

The sinornis has 1 Senses.

• sinornis
• sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds
• ジュラ紀から白亜紀のスズメほどの大きさの化石鳥で、竜骨の付いた胸骨と、退化した尾を持つ