Sinornis — definition

1. Sinornis (Noun)

1 definition

Sinornis (Noun) — 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.

1 type of
bird
1 part of
genus Sinornis
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