"(2005) analyzed a new, tenth specimen of "Archaeopteryx", and concluded that "Archaeopteryx" was the sister clade to the Deinonychosauria, but that the more advanced bird "Confuciusornis" was within the Dromaeosauridae.This result supports Paul's hypothesis, suggesting that the Deinonychosauria and the Troodontidae are part of Aves, the bird lineage proper, and secondarily flightless.