fix the lineage calculation of unknown taxa
fix the lineage calculation of unknown taxa

unipept/unipept,bmesuere/uni-test,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept