plosone-phylo
pone.0026207.g006
4% clock-constrained gene tree for the species of Aphonopelma found in Texas.
To assign dates to population-splitting events within the A. hentzi lineage and assess the importance of these historical events on cladogenesis across the whole tree, a fixed molecular clock at 4% was applied in BEAST to evaluate how this mygalomorph rate of evolution relates to the events of the Pleistocene. Population splits within the A. hentzi clade (northern vs. southern) are predicted to have originated around 237,000 ybp (294,900−183,200), represented by the light red box. The Pliocene/Pleistocene/Holocene time frame is displayed at top, years from present on the bottom, with The Last Glacial Maximum designated by the grey box. The bars correspond to 95% confidence intervals.
pone.0026207.g006
4% clock-constrained gene tree for the species of Aphonopelma found in Texas.
To assign dates to population-splitting events within the A. hentzi lineage and assess the importance of these historical events on cladogenesis across the whole tree, a fixed molecular clock at 4% was applied in BEAST to evaluate how this mygalomorph rate of evolution relates to the events of the Pleistocene. Population splits within the A. hentzi clade (northern vs. southern) are predicted to have originated around 237,000 ybp (294,900−183,200), represented by the light red box. The Pliocene/Pleistocene/Holocene time frame is displayed at top, years from present on the bottom, with The Last Glacial Maximum designated by the grey box. The bars correspond to 95% confidence intervals.