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This model accompanies an article published in Current Biology on 22 September 2016 (http://bit.ly/2crdu77), describing the partial skull and brain endocast of the dome-headed basal archosaur Triopticus primus (TMM 31100-1030) from the Upper Triassic Otis Chalk localties (Dockum Group) of Howard County, Texas, and its role in understanding evolutionary convergence among dinosaurs and their distant relatives. The article authors are Michelle Stocker, Sterling Nesbitt, Katharine Criswell, William Parker, Lawrence Witmer, Timothy Rowe, Ryan Ridgely, and Matthew Brown. 3D modeling was done by Ridgely. See https://skfb.ly/QFKG for a Sketchfab of the transparent partial skull with brain endocast. This research was funded in part by U.S. National Science Foundation grants to Witmer and Ridgely.