Table 1 AIC evaluation of model performance on the different evolutionary models run for best fit on the Phylogeny of Ornithischia updated to the topology recovered in this study and the new body size data reported herein for Tethyshadros.

From: An Italian dinosaur Lagerstätte reveals the tempo and mode of hadrosauriform body size evolution

OU model

AICc

AICc weights

OUMVA clade 2pDae

202.10121026452

0.5365

OUMVA clade 3p

203.316849995322

0.2922

BMS clade 2pOidea

206.480134133426

0.0601

BMS clade 2pDae

207.27392334102

0.0404

BMS clade 3p

208.690134835209

0.0199

OUMV clade 2pOidea

209.476798399784

0.0134

OUMV clade 3p

209.592599479123

0.0127

OUMVA clade 2pOidea

210.558649385763

0.0078

OUMV clade 2pDae

210.885190749501

0.0066

OUMA clade 2pDae

214.44485372578

0.0011

EB 2pDae

215.0879216843

0.0008

EB 2pOidea

215.087921684731

0.0008

EB 3p

215.087921685969

0.0008

BM 3p

215.782901747963

0.0006

BM 2pOidea

215.782901747963

0.0006

BM 2pDae

215.782901747963

0.0006

BM clade 3p

215.782903511791

0.0006

BM clade 2pOidea

215.782903511791

0.0006

BM clade 2pDae

215.782903511791

0.0006

OUM slice 3p

217.690892667324

0.0002

OUM slice 2pOidea

217.690892667324

0.0002

OUM slice 2pDae

217.690892667324

0.0002

BM slice 3p

217.701629604779

0.0002

BM slice 2pOidea

217.701629604779

0.0002

BM slice 2pDae

217.701629604779

0.0002

OUMA clade 3p

217.811129235353

0.0002

Stasis 2pOidea

217.88206501181

0.0002

Stasis 2pDae

217.88206501181

0.0002

OUM clade 2pDae

218.212527872988

0.0002

OUMA clade 2pOidea

219.102630618848

0.0001

OUMA slice 3p

219.219294813277

0.0001

OUMA slice 2pOidea

219.219294813277

0.0001

OUMA slice 2pDae

219.219294813277

0.0001

OUMV slice 3p

219.315502770849

0.0001

OUMV slice 2pOidea

219.315502770849

0.0001

OUMV slice 2pDae

219.315502770849

0.0001

OUM clade 2pOidea

219.454474618386

0.0001

Stasis 3p

219.926245193174

0.0001

Trend 3p

219.926245193174

0.0001

Trend 2pOidea

219.926245193174

0.0001

Trend 2pDae

219.926245193174

0.0001

OUM clade 3p

220.367158236624

0.0001

OUMVA slice 3p

221.419942633016

0

OUMVA slice 2pOidea

221.419942633016

0

OUMVA slice 2pDae

221.419942633016

0

  1. Symbols and abbreviations: BM, Brownian motion; clade, models with different parameters for each clade; EB, early boost (high σ at the base of the tree); slice, a model with a significant shift at a given time slice, here selected at 93.9 million years ago (Cenomanian/Turonian boundary); Stasis, a model with strong α towards a given θ; OU, Ornstein–Uhlenbeck; OUM, multi‐peak OU model (multiple regimes within individual θ values) with fixed values of α and σ; OUMV, multi‐peak OU model with fixed values of α and σ as a free parameter; OUMA, multi‐peak OU model with fixed values of σ and α as a free parameter; OUMVA, multi‐peak OU model with both σ and α as free parameters; Trend, a model following a given linear trend (given α constant). Partitioned models are abbreviated as: 3p, three portioned model with Hadrosauridae, Hadrosauroidea and non-hadrosauroid Ornithischia; 2pDae, two partitioned model with Hadrosauridae and non-hadrosaurid Ornithischia; 2pOidea, two partitioned model with Hadrosauroidea and non-hadrosauroid Ornithischia.
Back to article page