ata cean ▁family ▁Graph oc er at idae ▁that ▁lived ▁during ▁the ▁ ▁A alen ian ▁and ▁B ajo cian ▁stages , ▁Middle ▁Jur ass ic ▁in ▁what ▁is ▁now ▁Europe , ▁north ▁Africa , ▁and ▁Iran . ▁ ▁Graph oc eras ▁produced ▁a ▁com pressed , ▁invol ute ▁shell ▁with ▁a ▁raised ▁um bil ical ▁edge ▁and ▁sin uous ▁rib bing . ▁ ▁References ▁▁ ▁Ark ell ▁et ▁al ., ▁ 1 9 5 7 . ▁Mes oz o ic ▁Am m ono idea ▁( L 2 6 4 ), ▁Tre at ise ▁on ▁In verte br ate ▁Pale ont ology ▁Part ▁L . ▁Ge ological ▁Society ▁of ▁America ▁and ▁University ▁of ▁Kansas ▁Press . ▁ ▁Category : Middle ▁Jur ass ic ▁am mon ites ▁Category : Am mon ites ▁of ▁Europe ▁Category : H ild oc er ato idea ▁Category : Am mon it ida ▁gener a <0x0A> </s> ▁Sol id ar ity ▁was ▁a ▁political ▁party ▁created ▁in ▁the ▁lead - up ▁to ▁the ▁ 1 9 8 4 ▁South ▁African ▁general ▁election , ▁which ▁determined ▁the ▁make up ▁of ▁the ▁first ▁House ▁of ▁De leg ates , ▁the ▁body ▁within ▁the ▁A part heid ▁Tr ic amer al ▁Parliament ▁reserved ▁for ▁Indian ▁South ▁Afr icans . ▁It ▁took ▁its ▁name ▁from ▁the ▁Polish ▁trade ▁union . p . 4 0 ▁Its ▁first ▁leader ▁was ▁J N ▁Red dy , ▁an ▁influ ential ▁bank er ▁and ▁business man ▁with ▁a ▁number ▁of ▁company ▁director ships . ▁To ▁be ▁able ▁to