pat osa urus ▁had ▁a ▁single ▁large ▁cla w ▁on ▁each ▁for el imb , ▁a ▁feature ▁shared ▁by ▁all ▁sau rop ods ▁more ▁derived ▁than ▁Sh un osa urus . ▁The ▁first ▁three ▁to es ▁had ▁cla ws ▁on ▁each ▁h ind lim b . ▁The ▁ph al ange al ▁formula ▁is ▁ 2 - 1 - 1 - 1 - 1 , ▁meaning ▁the ▁inn erm ost ▁finger ▁( phal an x ) ▁on ▁the ▁for el imb ▁has ▁two ▁b ones ▁and ▁the ▁next ▁has ▁one . ▁The ▁single ▁manual ▁cla w ▁b one ▁( ung ual ) ▁is ▁slightly ▁cur ved ▁and ▁square ly ▁trunc ated ▁on ▁the ▁anterior ▁end . ▁The ▁pel vic ▁g ird le ▁includes ▁the ▁robust ▁il ia , ▁and ▁the ▁f used ▁( co - oss ified ) ▁pub es ▁and ▁is chia . ▁The ▁fem ora ▁of ▁A pat osa urus ▁are ▁very ▁st out ▁and ▁represent ▁some ▁of ▁the ▁most ▁robust ▁fem ora ▁of ▁any ▁member ▁of ▁Sau rop oda . ▁The ▁tib ia ▁and ▁fib ula ▁b ones ▁are ▁different ▁from ▁the ▁sl ender ▁b ones ▁of ▁Di pl od ocus ▁but ▁are ▁nearly ▁ind ist ingu ish able ▁from ▁those ▁of ▁Cam ar as aur us . ▁The ▁fib ula ▁is ▁longer ▁and ▁sl ender er ▁than ▁the ▁tib ia . ▁The ▁foot ▁of ▁A pat osa urus ▁has ▁three ▁cla ws ▁on ▁the ▁inn erm ost ▁digits ; ▁the ▁digit ▁formula ▁is ▁ 3 - 4 - 5 -