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Bootstrapped p-values for comparisons of maximum clade age and speciation rate variables in explaining global tetrapod species richness. The significant results are in bold (α < 0.05). max., maximum; spe., speciation.
| max. clade age > spe. rate | spe. rate > max. clade age | |
|---|---|---|
| tetrapods | 0.003 | 0.998 |
| amphibians | 0.280 | 0.721 |
| amphibiansa | 0.027 | 0.974 |
| birds | 0.007 | 0.994 |
| mammals | 9.99 × 10−4 | 1 |
| squamates | 0.453 | 0.547 |
aAmphibians without an outlier clade of Mediterranean Alytidae (12 species).
