Skip to main content
. 2012 Feb 1;279(1736):2180–2187. doi: 10.1098/rspb.2011.2441

Table 2.

Summary of results for phylogenetic model fitting for archosauromorph and therapsid clades. Key as for table 1 except: r, decay rate for exponentially changing rate of evolution. Brownian motion (BM) with trend indicates an evolutionary trend, BM indicates significant variation but no trend, OU indicates evolution towards an optimum and early burst indicates exponentially decreasing evolutionary rate.

clade n Brownian motion with trend (BM+trend)
Brownian motion (BM)
stasis
Ornstein–Uhlenbeck (OU)
early burst (EB)
A.W. μ, σ², θ (log mm) A.W. σ² (log mm) A.W. θ, ω (log mm) A.W. α, ω (log mm) A.W. ω (log mm), r
Archosauromorpha 150 0.177 −0.001, 0.006, 2.079 0.422 0.006 0 2.300, 0.252 0.252 0.004, 0.006 0.149 0.006, 0
 Dinosauromorpha 75 0.203 0.002, 0.006, 2.074 0.467 0.006 0 2.543, 0.169 0.172 0.002, 0.006 0.158 0.006, 0
 Ornithischia 14 0.047 0.003, 0.005, 2.180 0.243 0.005 0.557 2.308, 0.087 0.109 0.044, 0.010 0.043 0.005, 0
 Theropoda 24 0.163 −0.004, 0.007, 2.411 0.545 0.008 0.002 2.509, 0.151 0.145 0.003, 0.008 0.144 0.007, 0
 Sauropodomorpha 28 0.079 0.006, 0.005, 2.265 0.103 0.005 0.616 2.844, 0.078 0.172 20.480, 3.177 0.029 0.005, 0
 Pterosauria 12 0.003 0, 0.005, 1.596 0.022 0.005 0.861 1.674, 0.036 0.103 0.5000, 0.036 0.011 0.013, −0.050
 Pseudosuchia 30 0.155 −0.005, 0.005, 2.403 0.304 0.005 0.003 2.321, 0.100 0.212 0.031, 0.008 0.326 0.009,0.033
 Aetosauria 7 0.003 −0.006, 0.005, 2.545 0.365 0.005 0.626 2.342, 0.072 0.004 50.000, 7.202 0.003 0.005, 0
Therapsida 138 0.036 −0.001, 0.011, 1.988 0103 0.011 0 2.009, 0.099 0.347 0.027, 0.012 0.514 0.016,0.023
 Anomodontia 50 0.160 0.009, 0.012, 1.857 0.418 0.012 0 2.060, 0.097 0.177 0.031, 0.014, 0.244 0.023, −0.062
 Cynodontia 38 0.115 −0.003, 0.008, 1.859 0.347 0.008 0 1.807, 0.127 0.143 0.011, 0.009 0.395 0.011, 0.022
 Therocephalia 19 0.048 0.015, 0.007, 1.900 0.202 0.007 0.524 1.933, 0.024 0.193 0.258, 0.013 0.032 0.007, 0
 Gorgonopsia 37 0.000 −0.020, 0.014, 2.281 0.001 0.014 0.034 2.173, 0.025 0.964 0.534, 0.026 0 0.027, −0.064