. ▁Bar cl ay ▁McG he e ▁( 1 9 1 8 – 1 9 8 2 ), ▁Cleveland ▁then ▁continued ▁active ▁research ▁at ▁the ▁Zo ology ▁Department ▁of ▁the ▁University ▁of ▁Georgia ▁and ▁continued ▁publishing ▁papers ▁until ▁ 1 9 6 6 . ▁ ▁From ▁bi ological ▁material ▁collected ▁in ▁the ▁mountains ▁of ▁Virginia , ▁Cleveland ▁discovered ▁that ▁the ▁wood - d well ing , ▁wood - feed ing ▁ro ach ▁C rypt oc erc us ▁pun ct ul atus ▁contains ▁proto zo a ▁in ▁an ▁en larg ed ▁portion ▁of ▁its ▁pro ct ode um ▁( hind g ut ). ▁The ▁newly ▁discovered ▁proto zo a ▁were ▁closely ▁related ▁to ▁term ites ' ▁int est inal ▁flag ell ates . ▁The ▁existence ▁of ▁such ▁flag ell ates ▁had ▁been ▁known ▁for ▁many ▁years , ▁but ▁it ▁was ▁Cleveland ▁who ▁discovered ▁the ▁sym b ios is ▁between ▁the ▁int est inal ▁flag ell ates ▁and ▁their ▁term ite ▁hosts ▁and ▁published ▁the ▁empir ical ▁proof ▁in ▁a ▁series ▁of ▁papers ▁from ▁ 1 9 2 3 ▁to ▁ 1 9 2 8 . ▁ ▁He ▁also ▁established ▁that ▁the ▁ro ach ▁C rypt oc erc us ▁depends ▁upon ▁sym b ios is ▁with ▁its ▁int est inal ▁flag ell ates ▁to ▁util ize ▁cell ul ose ▁as ▁food . ▁From ▁the ▁early ▁ 1 9 3 0 s ▁on ward , ▁most ▁of ▁his ▁research ▁was ▁on ▁tax onom ic ▁and ▁experimental ▁studies ▁of ▁the ▁int est inal ▁proto zo a ▁of