Table 1 Species delimitation based on Bayes Factor Delimitation (BDF).

From: Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton

Hypothesis

Number of species

MLE

BF

Rank

Gephyocapsa huxleyi is a single species (Null hypothesis)

1

−53,986

0

4

Gephyrocapsa huxleyi is composed of two morphospecies (morphogroups A and B)

2

−54,078

184

5

Gephyrocapsa huxleyi is composed of three species, as suggested by the PCA (lineages A1, A2 and B)

3

−53,558

856

1

Gephyrocapsa huxleyi is composed of five species (two within the A morphogroup and three within the B morphogroup)

5

−53,569

−834

2

Each sub-clade (e.g., A1a, A1b, A1c, A1d) is a distinct species

8

−53,708

−556

3

  1. The best model is shown in bold.
  2. MLE Maximum Likelihood Estimation, BF Bayes Factor.