x1 is a genus [biology] with species x2, within family x3, order x4, class x5.
For biological cathegory in general (=mivyske klesi), domain (=?), kingdom (=seljimcymivykle), phylum (=jicymivykle), class (=xeljutsi), order (=veljutsi), family (=terjutsi), genus (=this definition), species (=jutsi).