Ordinary least squares (OLS) and phylogenetically based regression (PGLS, phylogenetic generalised least squares; OU, Ornstein-Uhlenbeck process) of body mass (kg) against convex hull volume (m3).

AIC, Uncorrected Akaike Information Criterion; d, restricted maximum likelihood estimate of the Ornstein-Uhlenbeck transformation parameter; ±95%, 95% confidence intervals of the intercept and slope; MSE, mean square error of the regression; %PE, mean percentage prediction error of the regression; PE ±95%, 95% confidence interval of mean PE. Log10 transformed OLS regressions discussed throughout the text and are highlighted in bold.AIC即未校正赤池信息准则（Uncorrected Akaike Information Criterion）；d为奥恩斯坦-乌伦贝克变换参数的限制性极大似然估计值；±95%指代截距与斜率的95%置信区间；MSE为回归均方误差（mean square error）；%PE为回归的平均百分比预测误差；PE ±95%为平均百分比预测误差的95%置信区间。全文所讨论的经对数10转换的普通最小二乘（OLS）回归均以粗体标注。