▁species ▁co ex isted ▁during ▁the ▁Ple ist oc ene . ▁This ▁perspective ▁separ ates ▁the ▁early ▁to ▁mid ▁Ple ist oc ene ▁H omo ▁species ▁into ▁H . ▁hab ilis , ▁H . ▁rud olf ensis , ▁H . ▁erg aster , ▁and ▁H . ▁ere ct us . ▁ ▁Sk ull ▁ 1 ▁▁ ▁Sk ull ▁ 1 ▁( D 2 2 8 0 ) ▁was ▁discovered ▁at ▁D man isi ▁in ▁ 1 9 9 9 , ▁during ▁the ▁same ▁field ▁season ▁in ▁which ▁Sk ull ▁ 2 ▁( D 2 2 8 2 ) ▁was ▁discovered . ▁Sk ull ▁ 1 , ▁Sk ull ▁ 2 , ▁and ▁the ▁mand ible ▁for ▁Sk ull ▁ 5 ▁( D 2 6 0 0 ) ▁were ▁all ▁found ▁within ▁the ▁same ▁ 2 m 2 ▁block ▁on ▁the ▁site . ▁ ▁Mor ph ology ▁ ▁Sk ull ▁ 1 ▁( D 2 2 8 0 ) ▁is ▁well ▁preserved ▁hom in in ▁cal var ia . ▁Port ions ▁of ▁the ▁c ran ial ▁base ▁and ▁oc cip ital ▁b one ▁are ▁dam aged , ▁and ▁the ▁z yg om atic ▁arch es ▁are ▁missing ▁entirely . ▁Additionally , ▁port ions ▁of ▁the ▁s phen oid ▁and ▁left ▁mand ib ular ▁f ossa ▁are ▁missing . ▁The ▁overall ▁shape ▁and ▁structure ▁of ▁the ▁brain ▁case ▁is ▁well ▁preserved , ▁allowing ▁research ers ▁to ▁accur ately ▁assess ▁the ▁c ran ial ▁capacity ▁at ▁ 7 7 5 ▁cc . ▁Sk ull ▁ 1