I would like to draw your attention to f Karin Kiontke et al.’s new paper in BMC Evolutionary Biology  on the phylogeny and molecular barcodes for Caenorhabditis. The authors describe quite a few new strains and species, which should be of interest to anyone interested in phylogeny of nematodes.

But they couldn’t find any sister species to C.elegans, so that challenge is still on.