Brito et al SRCT-PSICHE MHNM-KK-OT-36 (11.45 µm voxel size)

Two fragments of the holotype of the loricariid catfish Afrocascudo saharaensis gen. et sp. nov. (MHNM-KK-OT 36a &amp; 36c from the early Late Cretaceous of Jbel oum Tkout (Morocco) were studied in three dimensions using synchrotron X-ray mycrotomography. Measurements were performed at the PSICHÉ beamline of SOLEIL Synchrotron (Saint-Aubin, France) using a pink beam (63–69 keV), a single propagation distance of 36 cm, and 3900 projections. The available field of view was extended horizontally by positioning the rotation axis off-centre, and extended vertically by using a helicoid acquisition with a continuous vertical movement of the sample during multiple rotations of the sample. The volume (5.727 μm voxel size) was reconstructed from the combined radiographs using PyHST2 software, with a Paganin phase retrieval algorithm.<br>We here provide a slightly reduced version (crop, rescale 8-bit, binning 2x2x2) of the reconstructed tomograms (i.e. virtual slices) we used for the segmentation and 3D renderings presented in the paper. After binning the voxel size becomes 11.45 µm.Reference of the associated article: Brito P.M., Dutheil D.B., Gueriau P., Keith P., Carnevale G., Britto M., Meunier F.J., Khalloufi B., King A., de Amorin P.F. &amp; Costa W.J.E.M. 2024. A Saharan fossil and the dawn of Neotropical armoured catfishes in Gondwana. <i>Gondwana Research</i><i> </i>132, 103–112 (doi: 10.1016/j.gr.2024.04.008).