FIGURE 1. The snake palaeothermometer.

From the following article:

Re-calibrating the snake palaeothermometer

Anastassia M. Makarieva, Victor G. Gorshkov & Bai-Lian Li

Nature 460, E2-E3(30 July 2009)

doi:10.1038/nature08223

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Allometric dependencies of mass-specific metabolic rate q on body length L, Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, or to obtain a text description, please contact npg@nature.com, alpha = 0.17, are shown at four different temperatures. Points at which the allometric lines cross the horizontal dashed-line q = qmin correspond to body lengths of the largest snakes1, 2 in Palaeocene neotropics (A), South America (B), Colorado (C) and the United Kingdom (D). Temperatures reconstructed from the metabolic allometry (assuming that the anaconda lives at 26.5 °C) are marked on the thermometer, with the difference between the modern and Palaeocene neotropics shown in blue. Note that the reconstructed temperature differences pertain to the differences between typical 'lifestyle' temperatures of the considered species that can differ significantly from MAT in seasonal climates.

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