▁tort o ises ▁are ▁usually ▁collect ively ▁referred ▁to ▁as ▁Test udo ▁gra eca , ▁but ▁this ▁covers ▁a ▁wide ▁variety ▁of ▁sub species ▁that ▁have ▁very ▁different ▁e colog ical ▁and ▁morph ological ▁characteristics ▁and ▁appear ▁to ▁compr ise ▁at ▁least ▁three ▁ph y log en etic ▁line ages . ▁ ▁As ▁its ▁name ▁implies , ▁it ▁is ▁found ▁in ▁Tun is ia ▁and ▁nearby ▁Al ger ia . ▁ ▁Description ▁and ▁e col ogy ▁The ▁Tun is ian ▁tort o ise ▁is ▁a ▁relatively ▁small ▁tort o ise . ▁The ▁adult ▁males ▁usually ▁have ▁car ap aces ▁that ▁s eld om ▁exceed ▁ 1 3   cm ▁( about ▁ 4 . 5 ▁in ), ▁whilst ▁the ▁adult ▁females ' ▁car ap aces ▁are ▁no ▁more ▁than ▁ 1 6 . 5   cm ▁( some ▁ 6 . 5 ▁in ) ▁long . ▁The ▁ge ograph ically ▁closest ▁population ▁of ▁the ▁T . ▁gra eca ▁group , ▁from ▁Mor oc co , ▁is ▁decided ly ▁larger . ▁ ▁These ▁tort o ises ▁are ▁among ▁the ▁most ▁bright ly ▁colored ▁tax a ▁of ▁the ▁sp ur - th ighed ▁or ▁Greek ▁tort o ise ▁complex , ▁with ▁a ▁light ▁yellow ▁car ap ace ▁with ▁strong ▁black ▁mark ings ▁in ▁the ▁sc ute ▁cent ers . ▁The ▁pl astr on ▁also ▁has ▁a ▁bold ▁color ▁pattern . ▁On ▁the ▁top ▁of ▁the ▁head , ▁right ▁between ▁the ▁eyes , ▁is ▁a ▁distinct ▁yellow ish ▁spot . ▁ ▁Tun is ian ▁tort o