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. 2015 Feb 7;282(1800):20142245. doi: 10.1098/rspb.2014.2245

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© 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 2. — Quantitative assessment of the diversity and recovery potential of the Osteostraci, Thelodonti, Heterostraci (non-psammosteid, yellow/black, and total, orange/brown) and Galeaspida. (a) The positive relationships between diversity (number of genera, without ghost ranges) and record quality (number of horizons); (b) Inverse relationships between the number of horizons per interval and average sea-level per interval (percent maximum); (c) Non-significant correlations between the number of fossiliferous horizons and total rock outcrop area (number of maps of Western Europe from [12]); (d) Fossil recovery potentials through time for Osteostraci, Thelodonti, non-psammosteid Heterostraci and Galeaspisa based upon the inverse logarithmic relationship calculated in (b). The dark area represents the known ranges of the clades (), whilst the lighter (95%) and lightest areas (99%) under the lines represent the confidence intervals calculated as a proportion of the area under the line for the known range . All axes, except time, have been logged. Significant correlations marked with asterisk.

Inline graphic — Quantitative assessment of the diversity and recovery potential of the Osteostraci, Thelodonti, Heterostraci (non-psammosteid, yellow/black, and total, orange/brown) and Galeaspida. (a) The positive relationships between diversity (number of genera, without ghost ranges) and record quality (number of horizons); (b) Inverse relationships between the number of horizons per interval and average sea-level per interval (percent maximum); (c) Non-significant correlations between the number of fossiliferous horizons and total rock outcrop area (number of maps of Western Europe from [12]); (d) Fossil recovery potentials through time for Osteostraci, Thelodonti, non-psammosteid Heterostraci and Galeaspisa based upon the inverse logarithmic relationship calculated in (b). The dark area represents the known ranges of the clades (), whilst the lighter (95%) and lightest areas (99%) under the lines represent the confidence intervals calculated as a proportion of the area under the line for the known range . All axes, except time, have been logged. Significant correlations marked with asterisk.