called ▁Bru h ath k ay osa urus , ▁might ▁have ▁we ighed ▁over ▁ 1 7 5 ▁metric ▁tons ▁but ▁this ▁has ▁been ▁question ed . ▁The ▁weight ▁of ▁Am ph ico el ias ▁frag ill im us ▁was ▁estimated ▁at ▁ 1 2 2 . 4 ▁metric ▁tons ▁but ▁ 2 0 1 5 ▁research ▁argued ▁that ▁these ▁estimates ▁may ▁have ▁been ▁highly ▁ex agger ated . ▁The ▁largest ▁land ▁animal ▁alive ▁today , ▁the ▁Sav ann ah ▁ele ph ant , ▁we igh s ▁no ▁more ▁than ▁. ▁ ▁Among ▁the ▁smallest ▁sau rop ods ▁were ▁the ▁primitive ▁Oh m den osa urus ▁( 4   m , ▁or ▁ 1 3   ft ▁long ), ▁the ▁d war f ▁tit an osa ur ▁Magyar osa urus ▁( 6   m ▁or ▁ 2 0   ft ▁long ), ▁and ▁the ▁d war f ▁bra ch ios aur id ▁Europ as aur us , ▁which ▁was ▁ 6 . 2   met ers ▁long ▁as ▁a ▁fully - g rown ▁adult . ▁Its ▁small ▁stat ure ▁was ▁probably ▁the ▁result ▁of ▁ins ular ▁d war f ism ▁occurr ing ▁in ▁a ▁population ▁of ▁sau rop ods ▁isolated ▁on ▁an ▁island ▁of ▁the ▁late ▁Jur ass ic ▁in ▁what ▁is ▁now ▁the ▁Lang enberg ▁area ▁of ▁northern ▁Germany . ▁The ▁di pl od oc oid ▁sau rop od ▁Bra chy tra ch el op an ▁was ▁the ▁short est ▁member ▁of ▁its ▁group ▁because ▁of ▁its ▁unus ually ▁short ▁neck .