) ▁ ▁The ▁even - to ed ▁ung ul ates ▁are ▁ung ul ates ▁whose ▁weight ▁is ▁bor ne ▁about ▁equally ▁by ▁the ▁third ▁and ▁fourth ▁to es , ▁rather ▁than ▁mostly ▁or ▁entirely ▁by ▁the ▁third ▁as ▁in ▁per iss od act yl s . ▁There ▁are ▁about ▁ 2 2 0 ▁art iod act yl ▁species , ▁including ▁many ▁that ▁are ▁of ▁great ▁economic ▁importance ▁to ▁humans . ▁ ▁Family : ▁B ov idae ▁( c attle , ▁ant el ope , ▁sheep , ▁go ats ) ▁Sub family : ▁An til op inae ▁Gen us : ▁Gaz ella ▁ ▁Arab ian ▁gaz elle , ▁Gaz ella ▁arab ica ▁L C ▁ ▁Arab ian ▁sand ▁gaz elle , ▁Gaz ella ▁ ▁mar ica ▁V U ▁Sub family : ▁Cap r inae ▁Gen us : ▁Cap ra ▁ ▁N ub ian ▁i b ex , ▁Cap ra ▁n ub iana ▁EN ▁Sub family : ▁Hi pp ot rag inae ▁Gen us : ▁O ry x ▁ ▁Arab ian ▁or y x , ▁O ry x ▁le uc ory x ▁EN ▁Family : ▁Cam el idae ▁Gen us : ▁Cam el us ▁D rom ed ary , ▁Cam el us ▁d rom ed arius ▁L C ▁ ▁See ▁also ▁List ▁of ▁ch ord ate ▁orders ▁List s ▁of ▁m amm als ▁by ▁region ▁List ▁of ▁pre histor ic ▁m amm als ▁M amm al ▁classification ▁List ▁of ▁m amm als ▁described ▁in ▁the ▁ 2 0 0 0 s ▁Wild life ▁of ▁Sa