TreeBASE Search-Matrices for study 13194

@ARTICLE{TreeBASE2Ref21152, author = {Xu Xing and Wang De-You and Corwin Sullivan and David W. Hone}, title = {A basal parvicursorine (Theropoda: Alvarezsauridae) from the Upper Cretaceous of China.}, year = {2010}, keywords = {Late Cretaceous, Majiacun Formation, Parvicursorinae, Theropoda, cursoriality}, doi = {}, url = {http://graemetlloyd.com/matr.html}, pmid = {}, journal = {PLoS One}, volume = {5}, number = {}, pages = {1--14}, abstract = {A new alvarezsaurid theropod, Xixianykus zhangi gen. et sp. nov., is described based on a partial postcranial skeleton collected from the Upper Cretaceous Majiacun Formation of Xixia County, Henan Province. The new taxon can be diagnosed by the following autapomorphies: sacral rib-transverse process complexes and zygapophyses fused to form separate anterior and posterior laminae; distinct fossa dorsal to antitrochanter on lateral surface of ilium; short ridge along posterior surface of pubic shaft near proximal end; distinct depression on lateral surface of ischium near proximal end; sharp groove along posterior surface of ischium; distal end of femur with transversely narrow ectocondylar tuber that extends considerable distance proximally as sharp ridge; transversely narrow tibial cnemial crest with sharp, ridgelike distal half; lateral margin of tibiotarsus forms step near distal end; fibula with substantial extension of proximal articular surface onto posterior face of posteriorly curving shaft; distal tarsals and metatarsals co-ossified to form tarsometatarsus; and sharp flange along anteromedial margin of metatarsal IV near proximal end. Cladistic analysis places this taxon as a basal parvicursorine within the Alvarezsauridae, a position consistent with the presence of several incipiently developed parvicursorine features in this taxon and also with its relatively early geological age. A brief analysis of vertebral functional morphology, together with data from the hindlimb, suggests that parvicursorines represent extreme cursors among non-avian dinosaurs.} }