Lower jaw of the docodontan Docodon with manually edited middle ear bones, based on illustrations in Kermack et al. (1973), Kermack et al. (1981) and Luo (2011). Depicted in color code are the following elements: yellow = Meckel’s cartilage, dark blue = ectotympanic, green = articular, white = surangular, beige = dentary.

The lower jaw of Docodon is a composite based on specimens YPM10649, YPM13735, YPM11823 and YPM11826 from the Yale Quarry 9 at the Como Bluff Site published in Schultz et al. (2019) and free for download.

The 3D model of the lower jaw was segmented manually from CT scans using Avizo 8.1. (Visualization Sciences Group). The 3D models of the middle ear bones and Meckel’s cartilages were manually created using MAYA 16 (Autodesk) based on illustrations in Kermack et al. (1973), Kermack et al. (1981), Luo (2011), Luo et al. (2007), Luo et al. (2016), Ji et al. (2009), and Mao et al. (2020). 

For all models, fine tune editing and virtual alignment was performed using Polyworks (2014, InnovMetric Software Inc.) including Gouraud filters for smoothing surfaces, adding and removing triangles, reworking mesh and reducing data size.