Xanthosia gracilis Jakobsen and Collins 1997
Belongs to Xanthosia according to Jakobsen and Collins 1997
Sister taxa: Xanthosia americana, Xanthosia buchii, Xanthosia buteonis, Xanthosia danielae, Xanthosia elegans, Xanthosia fischeri, Xanthosia fossa, Xanthosia gibbosa, Xanthosia granulosa, Xanthosia occidentalis, Xanthosia robertsi, Xanthosia sakoi, Xanthosia semiornata, Xanthosia similis, Xanthosia socialis, Xanthosia zoquiapensis