Table 3.

Correlation of phylogenetically corrected diversity estimate (PDE) for species of pterosaurs (actual records plus ghost ranges), from Butler et al. (2009) with number of pterosaur-bearing formations (PBFs) from Butler et al. (2009), counted as raw data, log10 of raw values, to create a normal distribution of the data, and first differences (FD) to detrend the data, and divided by substage duration (∂t) to standardize for time. Comparisons are also made of raw pterosaur counts (TDE) and PDE with dinosaur-bearing collections (DBC) and dinosaur-bearing formations (DBF), as raw data and log10-tranformed data, both from Butler et al. (2011), to approximate a comprehensive FFC

Pearson's rPSpearman's ρPKendall's τP
PDE v. PBF0.610**0.560**0.460**
log10 (PDE v. PBF)0.490**0.560**0.460**
FD (PDE v. PBF)0.400**0.340**0.300.002**
GD (PDE v. PBF)−0.050.645−0.090.429−0.070.406
FD/∂t (PDE v. PBF)0.970**0.350**0.290.002**
TDE v. DBC0.320.1130.640**0.510**
TDE v. DBF0.490.012*0.540.004**0.410.005*
log10 (TDE v. DBC)0.600.001**0.650**0.480.001**
log10 (TDE v. DBF)0.590.002**0.550.004**0.420.004**
PDE v. DBC0.080.6990.370.0610.310.032*
PDE v. DBF0.200.3190.210.3140.170.238
log10 (PDE v. DBC)0.210.3130.360.0680.310.034*
log10 (PDE v. DBF)0.140.4990.200.3330.170.246
  • Probabilities (P) for each correlation measure are given, and these are marked as significant (P<0.5*) and highly significant (P<0.005**).