MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
Tail anatomy of Buitreraptor gonzalezorum (Theropoda, Unenlagiidae) and comparisons with other basal paravians
FERNANDO E. NOVAS; BRISSÓN EGLI, FEDERICO; MOTTA MATIAS
CRETACEOUS RESEARCH (PRINT)
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Lugar: Amsterdam; Año: 2017
Tail anatomy of unenlagiid theropods remains poorly known. The most complete and informative taxonof this family is Buitreraptor gonzalezorum from the Upper Cretaceous of Rio Negro province, Argentina.The aim of the present contribution is to carry out an analysis of the tail anatomy of Buitreraptor based onits holotype and a newly collected specimen as well. Similarities shared by Buitreraptor, Rahonavis,Anchiornis and Archaeopteryx include: mid-caudal vertebrae with postzygapophyses longer than prezygapophyses,and mid-caudal centra with a system of lateral laminae and concavities. Preservation ofparavian skeletons, as well as muscular reconstruction, indicate the presence of two different functionalsections of the tail. This contribution sheds light on paravian tail evolution and provides new data on tailchanges that occurred along the theropod line towards modern birds.