cis ors ▁in ▁the ▁upper ▁and ▁lower ▁j aw ▁which ▁grow ▁contin ually ▁and ▁must ▁be ▁kept ▁short ▁by ▁g na wing . ▁Most ▁rod ents ▁are ▁small ▁though ▁the ▁cap y bara ▁can ▁we igh ▁up ▁to ▁ 4 5   kg ▁( 1 0 0   lb ). ▁ ▁Sub order : ▁Sci uro gn ath i ▁Family : ▁Cast or idae ▁( be a vers ) ▁Gen us : ▁Cast or ▁ ▁E uras ian ▁be aver , ▁C . ▁fi ber ▁ ▁Family : ▁Sci ur idae ▁( squ ir rel s ) ▁Sub family : ▁Sci ur inae ▁Tri be : ▁P ter omy ini ▁Gen us : ▁P ter om ys ▁ ▁Si ber ian ▁flying ▁squ ir rel , ▁P ter om ys ▁vol ans ▁L R / nt ▁Sub family : ▁X er inae ▁Tri be : ▁Mar mot ini ▁Gen us : ▁Mar m ota ▁ ▁Bob ak ▁mar mot , ▁Mar m ota ▁b ob ak ▁L R / cd ▁Family : ▁Gl ir idae ▁( d orm ice ) ▁Sub family : ▁Le ith i inae ▁Gen us : ▁D ry om ys ▁ ▁Forest ▁d orm ouse , ▁D ry om ys ▁n ited ula ▁L R / nt ▁Gen us : ▁Mus card inus ▁ ▁Haz el ▁d orm ouse , ▁Mus card inus ▁av ellan arius ▁L R / nt ▁Sub family : ▁Gl ir inae ▁Gen us : ▁Gl is ▁ ▁Ed ible ▁d orm ouse , ▁Gl