Figure 3.

Panagrolaimus Species Diversification Age

Using our own generation time measures, genome-wide divergence calculated with Andi, and previous data for Caenorhabditis species as reference, we calculated possible age of divergence between the different species and the origin of parthenogenesis in Panagrolaimus. Eight days per generation was measured in the laboratory and would indicate an approximate age of 1.3 mya for the PS1159/P. superbus split (see Table 3). Fifty days per generation would be a realistic estimate for species living in harsh conditions and would suggest a more ancient origin.