5 4 5 ▁cc ). ▁The ▁range ▁between ▁the ▁brain ▁sizes ▁of ▁Sk ull ▁ 5 ▁and ▁Sk ull ▁ 1 ▁( the ▁D man isi ▁sk ull ▁with ▁the ▁largest ▁c ran ial ▁capacity ) ▁is ▁roughly ▁ 2 3 0 cc . ▁The ▁well ▁preserved ▁art ic ulation ▁points ▁between ▁the ▁c ran ium ▁and ▁mand ible ▁also ▁allowed ▁research ers ▁to ▁finally ▁accur ately ▁assess ▁how ▁the ▁H . ▁ere ct us ▁( sens u ▁l ato ) ▁mand ible ▁orient ed ▁with ▁the ▁c ran ium . ▁The ▁face ▁of ▁Sk ull ▁ 5 ▁is ▁fairly ▁primitive , ▁with ▁significant ▁pro gn ath ism , ▁large ▁brow ▁rid ges , ▁and ▁highly ▁robust ▁mus cle ▁attach ments . ▁Comp ared ▁to ▁the ▁fairly ▁gra cile ▁Sk ull ▁ 2 ▁and ▁Sk ull ▁ 4 ▁( pot entially ▁a ▁female ▁and ▁male ▁respectively ), ▁Sk ull ▁ 5 ▁is ▁significantly ▁more ▁robust . ▁The ▁size ▁of ▁the ▁sk ull ▁indicates ▁that ▁the ▁body ▁proport ions ▁of ▁the ▁individual ▁would ▁have ▁been ▁largely ▁similar ▁to ▁modern ▁humans . ▁ ▁The ▁bra inc ase ▁of ▁Sk ull ▁ 5 ▁is ▁low , ▁wide , ▁and ▁bell ▁sh aped , ▁with ▁minor ▁sag itt al ▁ke eling ▁and ▁a ▁slightly ▁s lop ing ▁front al ▁squ ama . ▁It ▁has ▁fairly ▁primitive ▁ske let al ▁architecture , ▁with ▁large ▁m astic atory ▁mus cles , ▁large ▁z yg om atic ▁arch es , ▁and ▁a ▁project ing ▁oc cip ital ▁prot uber ance