FIGURE 1. APC distribution for all journals that have a ‘gold’ OA option. An APC of zero denotes a ‘diamond’ OA journal.

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FIGURE 2. Publisher-imposed embargo periods on sharing of postprints (months).

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FIGURE 3. Histogram of SNIP scores for palaeontology journals.

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FIGURE 4. Histogram of impact factor scores for palaeontology journals.

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FIGURE 5. Relationship between SNIP and IF for palaeontology journals, with a fitted linear regression (the grey shaded area represents the 95% confidence intervals for the model). R-squared = 0.899.

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FIGURE 6. Relationship between SNIP and APC. R-squared = 0.135.

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FIGURE 7. Relationship between IF and APC. R-squared = 0.227.

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