†Xanthosia sakoi Karasawa et al. 2008
Belongs to Xanthosia according to Karasawa et al. 2008
Sister taxa: Xanthosia americana, Xanthosia buchii, Xanthosia buteonis, Xanthosia danielae, Xanthosia elegans, Xanthosia fischeri, Xanthosia fossa, Xanthosia gibbosa, Xanthosia gracilis, Xanthosia granulosa, Xanthosia occidentalis, Xanthosia robertsi, Xanthosia semiornata, Xanthosia similis, Xanthosia socialis, Xanthosia zoquiapensis