INFORMATION ON THE DATASET FOR Neuroanatomy of the mekosuchine crocodylian Trilophosuchus rackhami Willis, 1993 BY JORGO RISTEVSKI This dataset serves as supplementary material to the study titled “Neuroanatomy of the mekosuchine crocodylian Trilophosuchus rackhami Willis, 1993” by Jorgo Ristevski. All of the data was created by Jorgo Ristevski. The dataset contains the following: - Supplemental Document S1 - Supplemental Document S2 - Supplemental Document S3 - Supplemental Document S4 - High-resolution versions of supplementary figures - Three interactive 3D PDF documents of the Trilophosuchus rackhami holotype specimen (QMF16856) - STL files of the endocranial elements of the Trilophosuchus rackhami holotype specimen - STL files of the brain and brain endocast of Crocodylus porosus specimen OUVC 10899 - STL files of the brain endocasts of Crocodylus porosus specimens QMJ48127 and QMJ52809 Supplemental Documents S1, S2, S3 and the high-resolution versions of supplementary figures are available at Zenodo (https://doi.org/10.5281/zenodo.6968373). All other files available at Dryad (https://doi.org/10.5061/dryad.fbg79cnx4). Supplemental Document S1 (in PDF format) contains additional figures related to the neuroanatomy of the Trilophosuchus rackhami holotype. Supplemental Document S2 (in PDF format) contains information on how to obtain measurements, and sources used in the comparative palaeoneurology. Supplemental Document S3 (in PDF format) contains additional figures related to crocodylomorph palaeoneurology. Finally, the ZIP file containing Supplemental Document S4 (in XLSX format) contains raw morphometric data for various crocodylomorphs. High-resolution versions (in PDF format) for some of the figures (21 in total) included in Supplemental Documents S1, S2 and S3 are also included among the files in this dataset. This dataset includes three interactive 3D PDF documents: the first contains high-quality (HQ) renderings of all isolated cranial bones and all endocranial elements of the T. rackhami holotype; the second contains HQ renderings of the T. rackhami holotype cranium (no digital models of the individual cranial bones included) and all endocranial elements; and, the third contains a low-quality (LQ) rendering of the T. rackhami holotype cranium (no digital models of the individual cranial bones included) and HQ renderings of all endocranial elements. The aim of the first 3D PDF is to provide an easy visualization of the endocranial elements alongside the individual cranial bones, whereas the purpose of the second 3D PDF is to allow for a more convenient visualization of the endocranial elements in context of the completely articulated cranium. The intended use of the LQ 3D PDF document is to aid in a faster visualization of the digital models on a machine with lower specifications. Aside from these caveats, there are no other differences between the 3D PDF documents. The interactive 3D PDFs can be opened in Adobe Acrobat DC and visualized with the aid of the tools from the 3D toolbar (Rotate, Spin, Pan, Zoom, Walk, Fly). Measurements can also be taken on the 3D models by using the 3D Measurement Tool. Each individual cranial bone and digitally reconstructed endocranial element can be viewed in isolation or along with all other (or only some) elements, and even made transparent by using the options in the Model Tree of the PDF document. The background color in each document and the lighting for the 3D models can also be changed, depending on the preference of the viewer. The individual STL files (36 in total) of the endocranial elements from the T. rackhami holotype specimen are included in a ZIP file. Similarly, the individual STL files of the brain and brain endocasts of three C. porosus specimens (OUVC 10899, QMJ48127 and QMJ52809) are also given in two additional ZIP files (one ZIP file for OUVC 10899 and the other ZIP file for QMJ48127 and QMJ52809). Please do not reuse any of the data without citation.