出典:Wikipedia
出典:『Wikipedia』 (2010/10/17 13:57 UTC 版)
"Proornis" is an extinct genus of basal bird from the Early Cretaceous (Barremian, 130-125 mya?) of northernmost North Korea. Since it was never formally described in a peer - reviewed journal, the genus is considered a nomen nudum and thus not italicized. A single species Proornis coreae 1 is known.