Dividing chimp species / populations

Interesting Katy Gonder PNAS paper on microsats and clustering of chimp populations using e.g. STRUCTURE: pretty clear verus vs everyone else split.

But HERE (Hahn and Worobey -- probably done in connection with Ochman's microbiome stuff) is a recent view of the same issue focused on mtDNA genomes and finds verus + vellerosus vs everyone else split.