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
The Anatomy of Melancholy and others – make it a valuable contribution to multiple research disciplines. Burton was an obsessive rewriter of his work and published five revised and expanded editions of "The Anatomy of Melancholy" during his lifetime. It has often been out of print, most notably between 1676 and 1800. Because no original manuscript of the "Anatomy" has survived, later reprints have drawn more or less faithfully from the editions published during Burton's life. Early editions are now in the public domain, with several available in their entirety from a number of online sources such as Project Gutenberg. In recent years, increased