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Table 3 Results of fitting diversification models to the pattern of the sigmodontine radiation. Summary of diversification models fitted to the branching times derived from the the 1000 completed data sets generated via CorSiM (using Laser and TreePar) . Models considered: pure-birth model -PB-, birth-death -BD-, two rate-variable models [logistic density-dependent model and the exponential density-dependent model (DDL and DDX respectively)], three time-varying models [incorporating declining speciation rate, and BD2r and Y2r [variants of BD PB models with a rate shift at a certain time “st”]. Bold parameter values indicate the best fitting models according to AIC values. Parameters are abbreviated as follows: a = extinction fraction (extinction/speciation); kd = k-parameter from the DDL model; λ = speciation rate; μ = extinction rate; r = net diversification rates (speciation-extinction), r1 = initial rate and r2 = final rate; st = shift time; xp = the x-parameter from the DDX model

From: The influence of ecological and geographical context in the radiation of Neotropical sigmodontine rodents

CorSiM (Laser)

Parameters

SD

Mean AIC

% favored model

PB

r 0.45

0.01

−2258

0

BD

r 0.45; a 0

0.01; 0

−2556

0

DDL

r 0.72; kd 635.7

0.04; 73.57

−2593

94.6

DDX

r 2.13; xp 0.3

0.12; 0.01

−2588

5.4

CorSiM (TreePar)

    

PB

Λ 0.452

0

878.9

0

BD

Λ 0.452 ; μ 3.14e-7

0.0055; 7.60E-07

880.9

0

Y2r

Λ2 0.58, Λ1 0.326, st 1.405

0.033; 0.029; 0.399

850.3

88.6

BD2r

a1 16.5; a2 0.01; r1 -1.73; r2 0.61; st 1.08

71.0; 0.04; 6.99; 0.046; 0.57

852.8

11.4