xeljutsi lujvo

x1 is a class [biology] with genus x2, family x3, order x4, and with species x5.

For biological cathegory in general (=mivyske klesi), domain (=?), kingdom (=seljimcymivykle), phylum (=jicymivykle), class (=this definition), order (=veljutsi), family (=terjutsi), genus (=seljutsi), species (=jutsi).

In notes:

jicymivykle
k1=jm1=ji3 is a phylum [animals]/division [plants] within/of kingdom [biology] k2=ji2.
seljimcymivykle
k1=jm1=ji3 is a kingdom [biology] of domain [biology] k2.
seljutsi
x1 is a genus [biology] with species x2, within family x3, order x4, class x5.
terjutsi
x1 is a family [biology] with genus x2, species x3, within order x4, class x5.
veljutsi
x1 is an order [biology] with genus x2, family x3, with species x4, within class x5.