Table 2 Diversification tests using genus specific speciation and extinction rate-constant models.

From: Different diversity-dependent declines in speciation rate unbalances species richness in terrestrial slugs

Package

Function

IST

Model

Arion (A)

Geomalacus (G)

AIC

Δ AIC

λ

μ

λ

μ

diversitree

make.bd.split

yes

Pure-birth (λA, λG)

0.146

‡

0.433

‡

30.458

1.800

diversitree

make.bd.split

yes

Constrained pure-birth (λA = λ G)

0.144

‡

0.144

‡

28.460

0.000

diversitree

make.bd.split

yes

Birth-death (λA, λG, μA, μG)

0.146

0.000

0.143

0.000

34.458

5.810

  1. Bold  identifies the best-fit model. AIC’s and the difference in AIC’s with the best model (∆AIC) are shown. IST, incomplete sampling taxa; λA, the initial speciation rate in Arion; λG, the initial speciation rate in Geomalacus; μ 0A, the initial extinction rate in Arion; μ 0G, the initial extinction rate in Geomalacus; λ, the initial speciation rate; μ, the initial extinction rate; ‡ in the pure-birth model, extinction is fixed to zero.
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