Fig. 8 in Cryptic species complex or an incomplete speciation? Phylogeographic analysis reveals an intricate Pleistocene history of Priapulus caudatus Lamarck, 1816

Fig. 8. Ultrametric COI tree calculated in BEAST 2.4 software under the Birth-Death model in 107 MCMC generations (including available sequences from GenBank). Black numbers above branches indicate millions of years (Mya); white numbers below indicate posterior probabilities. On the left side: classic subdivision of the Pliocene-Pleistocene according to Horikawa et al. (2015), M¨oller et al. (2019), and Astakhov and Semionova (2021). Grey boxes indicate glacial periods.