RESEARCH ARTICLE Osteology of Pseudochampsa ischigualastensis gen. et comb. nov. (Archosauriformes: Proterochampsidae) from the Early Late Triassic Ischigualasto Formation of Northwestern Argentina M. Jimena Trotteyn1,2*, Martı´n D. Ezcurra3 1. CONICET, Consejo Nacional de Investigaciones Cientı´ficas y Te´cnicas, Ciudad Auto´noma de Buenos Aires, Buenos Aires, Argentina, 2. INGEO, Instituto de Geologı´a, Facultad de Ciencias Exactas, Fı´sicas y Naturales, Universidad Nacional de San Juan, San Juan, San Juan, Argentina, 3. School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, West Midlands, United Kingdom *
[email protected] Abstract OPEN ACCESS Proterochampsids are crocodile-like, probably semi-aquatic, quadrupedal Citation: Trotteyn MJ, Ezcurra MD (2014) Osteology archosauriforms characterized by an elongated and dorsoventrally low skull. The of Pseudochampsa ischigualastensis gen. et comb. nov. (Archosauriformes: Proterochampsidae) from the group is endemic from the Middle-Late Triassic of South America. The most Early Late Triassic Ischigualasto Formation of recently erected proterochampsid species is ‘‘Chanaresuchus ischigualastensis’’, Northwestern Argentina. PLoS ONE 9(11): e111388. doi:10.1371/journal.pone.0111388 based on a single, fairly complete skeleton from the early Late Triassic Editor: Peter Dodson, University of Pennsylvania, Ischigualasto Formation of northwestern Argentina. We describe here in detail the United States of America non-braincase cranial and postcranial anatomy