Table 3.

Δ₄₇ measurements from Miocene mammal and ectotherm tooth bioapatite

Species	N *	Δ47	Δ47 Body Temperature (°C) †
Rhinocerotidae Acquisitions from 2 teeth	6	0.597 ± 0.005	36.6 ± 1.3
Alligator sp. Acquisitions from 5 teeth	2	0.623 ± 0.017	30.4 ± 3.9

± Δ₄₇, ± values represent the external precision of the measurement (one standard error if more than two analyses were made; if fewer were made, then the standard deviation is shown). Body temperature ± values represent the error in body temperatures in °C calculated by propagating the uncertainty in Δ₄₇.

^*Number of distinct extractions of CO₂ made on bioapatite of each taxon. In the case of the rhinocerotid specimens, three extractions were made of each tooth. In the case of the Alligator sp. one extraction was made on powder from two teeth, and a second extraction on three teeth. Material from multiple alligator teeth was pooled as a necessity to gain enough enamel for analysis. Data for individual extractions is given in Table S3.

^†Calculated assuming Δ₄₇ values in bioapatite show the same temperature dependency as inorganic calcite, given in Eq. 1