paleontologists as belonging to the subgroup Maniraptora. A portion of a tail belonging to a juvenile coelurosaur was found in 2015, inside of a piece of amber. Classification The phylogeny and taxonomy of Coelurosauria has been subject to intensive research and revision. For many years, Coelurosauria was a 'dumping ground' for all small theropods. In the 1960s several distinctive lineages of coelurosaurs were recognized, and a number of new infraorders were erected, including the Ornithomimosauria, Deinonychosauria, and Oviraptorosauria. During the 1980s and 1990s, paleontologists began to give Coelurosauria a formal definition, usually as all animals closer to birds than to Allosaurus, or equivalent specifiers. Under this modern definition, many small theropods are not classified as coelurosaurs at all and some large theropods, such as the tyrannosaurids, were actually more advanced than allosaurs and therefore were reclassified as giant coelurosaurs. Even more drastically, the segnosaurs, once not even regarded as theropods, have turned out to be non-carnivorous coelurosaurs related to Therizinosaurus. Senter (2007) listed 59 different published phylogenies since 1984. Those since 2005 have followed almost the same pattern, and differ significantly from many older phylogenies. Within Coelurosauria exists a slightly less inclusive clade named Tyrannoraptora. This clade was defined by Sereno (1999) as "Tyrannosaurus rex, Passer domesticus (the house sparrow), their last common ancestor, and all of its descendants". As tyrannosauroids are considered to be the most basal large group within Coelurosauria, this means that the common ancestor of tyrannosauroids and birds was an even more basal coelurosaurian. As a result, almost all coelurosaurians are also tyrannoraptorans, with the only exceptions being particularly basal species such as Zuolong salleei or Sciurumimus albersdoerferi. Within Tyrannoraptora exists a slightly less inclusive clade named Neocoelurosauria erected by Hendrickx, Mateus, Araújo and Choiniere (2019), defining it as "the clade Compsognathidae + Maniraptoriformes", which can be more or less inclusive than Maniraptoromorpha depending on the topology. The following family tree illustrates a synthesis of the relationships of the major coelurosaurian groups based on various studies conducted in the 2010s. {{clade| style=font-size:100%;line-height:80% |label1=Coelurosauria |1={{clade |1=†Bicentenaria |2={{clade |1=†Zuolong |label2=Tyrannoraptora |2={{clade |1=†Tyrannosauroidea |label2= |2={{clade |1=†Aorun |2={{clade |1=†Scipionyx |2={{clade |1=†Ornitholestes |2= }} }} }} }} }} }} }} "Coelurosaurus" "Coelurosaurus" is an informal generic name, attributed to Friedrich von Huene, 1929, that is sometimes seen in lists of dinosaurs. It probably arose as a typographical error; von Huene intended to assign indeterminate remains to Coelurosauria incertae sedis, but at