Specimen list and measurement data for Stenopterygius quadriscissus; Plot of lower jaw length against stratigraphic occurrence for all specimens of S. quadriscissus

Supplementary Table 1.—Specimen list and measurement data for Stenopterygius quadriscissus. Note that only approximate geographic provenance is available as these are historical finds. All measurements are in millimetres. Specimens for which all 6 measurements were not available were included in the lower jaw mean length analysis, but not the PCA analysis.; Supplementary Figure 1.—Plot of lower jaw length against stratigraphic occurrence for all specimens of S. quadriscissus (juveniles included).