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Table 1 Model output predicting species richness showing that all included explanatory variables were significant predictors of diversity, though diversification rate dominated

From: Radiating pain: venom has contributed to the diversification of the largest radiations of vertebrate and invertebrate animals

 

Coefficient

SE

t

P

Fishes

Intercept

− 1.0392

0.7996

− 1.2996

0.1944

Venom

0.5201

0.2242

2.3202

0.0208

Diversification rate

29.6560

1.3786

21.5108

< 2.2 × 10–16

Clade age

0.0436

0.0048

9.1523

< 2.2 × 10–16

Clade age (quadratic)

− 0.0001

0.00002

− 6.9864

1.0 × 10–11

Insects

Intercept

− 1.1889

0.3980

− 2.9869

0.0029

Venom

0.5777

0.1694

3.4094

0.0007

Diversification rate

39.5480

1.7124

23.0944

 < 2.2 × 10–16

Clade age

0.0515

0.0046

11.1436

 < 2.2 × 10–16

Clade age (quadratic)

− 0.0001

0.00001

− 9.0802

 < 2.2 × 10–16

  1. Lambda parameter for fish model was estimated to be 0.784, the estimated parameters from the OU model for insects were α = 0.016 (phylogenetic half-life of 43.7my) and σ2 = 0.098. Results shown for diversification rate based on ε = 0.5, see Additional file 1: Table S1 for equivalent model outputs for ε = 0 and ε = 0.9