Motani, R. Jiang, D.-Y. Chen, G.-B. Tintori, A. Rieppel, O. Ji, C. Huang, J.-D. 2015 A basal ichthyosauriform with a short snout from the Lower Triassic of China Nature 517 485-488 Petrolacosaurus Thadeosaurus Claudiosaurus Hovasaurus Hupehsuchus Cartorhynchus Chaohusaurus_geishanensis Chaohusaurus_chaoxianensis Chaohusaurus_zhangjiawanensis Utatsusaurus Grippia Gulosaurus Parvinatator Mixosaurus_panxianensis Mixosaurus_cornalianus Mixosaurus_kuhnschnyderi Phalarodus_atavus Phalarodus_fraasi Phalarodus_callawayi Cymbospondylus_petrinus Cymbospondylus_buchseri Cymbospondylus_nichollsi Xinminosaurus Besanosaurus Guizhouichthyosaurus Callawayia_wolonggangensis Guanlingsaurus Shastasaurus Shonisaurus_popularis Shonisaurus_sikanniensis Californosaurus Toretocnemus Qianichthyosaurus_zhoui Qianichthyosaurus_xingyiensis Callawayia_neoscapularis Hudsonelpidia Macgowania Suevoleviathan Temnodontosaurus Leptonectes_tenuirostris Leptonectes_moorei Leptonectes_solei Excalibosaurus Eurhinosaurus Ichthyosaurus Stenopterygius Aegirosaurus Acamptonectes Maiaspondylus Arthropterygius Athabascasaurus Sveltonectes Brachypterygius Caypullisaurus Platypterygius Ophthalmosaurus Osteology Maximum Parsimony Based on reanalysis of the original matrix. Motani_etal_2015ac