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
Scientific University of the South Campus Villa. For transportation of students inside the campus, the university provides bicycles. The former Hall A was equipped, remodeled and re-inaugurated in 2013 as "Fernando Cabieses Molina" Research Hall. The building stands as the mainstay of scientific production in the university. Besides several research and teaching laboratories, it has an anatomy amphitheater. The library offers its services in two campuses. The Main Library, which is settled in Campus Villa 1, contains most of the collection and resources. The library settled in the “Casona“, in Miraflores District, Lima, has a smaller collection, though, it may request books and other resources