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Table 2 Information on sequence alignments of the different datasets and models of sequence evolution for Bayesian analyses

From: From sea to land and beyond – New insights into the evolution of euthyneuran Gastropoda (Mollusca)

Gene region and taxon set

Number of taxa

Length of alignment (after removal of ambiguous positions)

Excluded nucleotide positions

Model of sequence evolution

18S rRNA (large taxon set)

53

1843

228–302

TRN+I+G

   

773–1044

α = 0.3539

   

1500–1523

pinv = 0.3977

   

1777–1990

 

18S rRNA (reduced taxon set)

34

1826

228–302

TRN+I+G

   

766–1037

α = 0.3202

   

1490–1513

pinv = 0.4220

   

1750–1977

 

28S rRNA (large taxon set)

52

1123

540–565

GTR+I+G

   

656–712

α = 0.5337

   

1076–1125

pinv = 0.2449

28S rRNA (reduced taxon set)

34

1099

543–562

GTR+I+G

   

675–726

α = 0.3905

   

1052–1074

pinv = 0.0889

16S rRNA (large taxon set)

49

452

318–450

HKY+I+G

   

486–587

α = 0.6450

   

664–681

pinv = 0.2421

16S rRNA (reduced taxon set)

34

452

318–450

K81uf+I+G

   

486–587

α = 0.5878

   

664–681

pinv = 0.2173

CO1 (large taxon set)

47

597

 

GTR+I+G

    

α = 0.4170

    

pinv = 0.2722

CO1 (reduced taxon set)

34

597

 

GTR+I+G

    

α = 0.3975

    

pinv = 0.3077

CO1 (without 3rd codon position) (large taxon set)

47

400

3rd codon positions

TIM+I+G

    

α = 0.3496

    

pinv = 0.3879

CO1 (without 3rd codon position) (reduced taxon set)

34

400

3rd codon positions

TIM+I+G

    

α = 0.3435

    

pinv = 0.4759