Zhongjianornis an enlarged, keeled breastbone in more advanced birds. However, later analysis of the anatomy of "Z. yangi" cast doubt on this interpretation of the bird as very primitive. Research published in 2012 found that some of the apparently primitive features were due to poor preservation of the bones, and that "Zhongjianornis" is more similar in anatomy to primitive euornitheans like "Chaoyangia" and "Schizooura". A phylogenetic analysis showed that a very primitive position in the bird family tree for "Z. yangi" is unlikely given current evidence. Zhongjianornis Zhongjianornis is a genus of beaked, pigeon-sized birds from the early Cretaceous period of
A Scientific Support for Darwinism case, as well as announce the results in a press release. The petition was not completed sufficiently early to submit it as part of an "amicus curae" brief for the Dover case. However, if the case was to go to the US Supreme Court, the petition could have been submitted as an "amicus" brief at that time. R. Joe Brandon emphasized that this "Four Day Petition" did not mean that scientific issues are settled by majority vote. What Brandon maintains is that this is an indication of the level of scientific consensus that accepts evolution as a viable established scientific