Extended Data Fig. 2: PPC- SRμCT data of FAU.DGS.ND.161.4559.T, a partial paddlefish from the Tanis locality.

a, Orthogonal virtual thin sections (100 μm thick, average-value projections) obtained in front, top, and right view. b, Impact spherules in virtual thin sections of a, indicated with yellow circles. Scale bars a 1 mm. c, Three-dimensional rendering (in left lateral view) with virtual cross sections of d (blue), e (green), and f (red) indicated. d, Coronal virtual slice. e, Sagittal virtual slice. f, Axial virtual slice, brain-enveloping tissues indicated with red arrows. g, Three-dimensional rendering in right lateral view with anatomical labels. h, Three-dimensional rendering in left lateral view with anatomical labels.