Ornithothoraces follows the results of a phylogenetic analysis by Wang "et al.", 2016: Ornithothoraces Ornithothoraces is a group of avialans that includes all enantiornithes ("opposite birds") and the euornithes ("true birds"), which includes modern birds and their closest ancestors. The name Ornithothoraces means "bird thoraxes". This refers to the modern, highly advanced anatomy of the thorax that gave the ornithothoracines superior flight capability compared with more primitive avialans. This anatomy includes a large, keeled breastbone, elongated coracoids and a modified glenoid joint in the shoulder, and a semi-rigid rib cage. The earliest known members of the group are the enantiornitheans "Protopteryx
The Anatomy of Melancholy the "Anatomy" is filled with more or less pertinent references to the works of others. A competent Latinist, Burton also included a great deal of Latin poetry in the "Anatomy", and many of his inclusions from ancient sources are left untranslated in the text. "The Anatomy of Melancholy" is an especially lengthy book, the first edition being a single quarto volume nearly 900 pages long; subsequent editions were even longer. The text is divided into three major sections plus an introduction, the whole written in Burton's sprawling style. Characteristically, the introduction includes not only an author's note (titled "Democritus Junior