FIGURE 1. General map showing relationship of the four geographic areas that provided specimens for this study. The base map is for the Late Cretaceous (75Ma) from R. Blakey, Northern Arizona University.
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FIGURE 1. General map showing relationship of the four geographic areas that provided specimens for this study. The base map is for the Late Cretaceous (75Ma) from R. Blakey, Northern Arizona University.
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