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FIGURE 1. Generalized geology and stratigraphy of Oligocene marine strata in the vicinity of Ladson and Summerville, South Carolina, USA. A) Map of South Carolina showing Charleston. B) Map of Charleston showing the extent of Oligocene marine rocks; star denotes the location of the McKewn subdivision and Chandler Bridge excavation localities. C) Stratigraphic column of Oligocene marine rocks and overlying deposits as exposed in stormwater pond excavations at the McKewn Subdivision locality near Ladson, South Carolina. Modified from Fallon and Boessenecker (2020).

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FIGURE 2. The largest available specimens (crown height >75 mm) of Carcharocles angustidens, in labial view (left) and lingual view (right).

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FIGURE 3. Teeth of Carcharocles angustidens from the Chandler Bridge Formation (late Oligocene), from the McKewn subdivision sample (top, CCNHM specimens) and part of the Chandler Bridge excavation sample (bottom, ChM specimens). Teeth shown in anatomical orientation (e.g., crown downwards for upper teeth); labial on left, lingual on right in all cases. All specimens shown to scale.

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FIGURE 4. Teeth of Carcharocles angustidens from the Chandler Bridge Formation (late Oligocene), from the Chandler Bridge excavation sample, in anatomical orientation (e.g., crown downwards for upper teeth); labial on left, lingual on right in all cases. All specimens shown to scale.

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FIGURE 5. Teeth of Carcharocles angustidens from the Ashley Formation (early Oligocene), from the McKewn subdivision sample, in anatomical orientation (e.g., crown downwards for upper teeth); labial on left, lingual on right in all cases. All specimens shown to scale.

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FIGURE 6. Histogram showing range of body length estimates from A) the McKewn subdivision sample (n=32), B) the Chandler Bridge excavation sample (n=95), and C) combined samples from the Chandler Bridge Formation (McKewn subdivision and Chandler Bridge excavation; n=127).

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