mark . ▁ ▁F oss ils ▁tent atively ▁placed ▁in ▁Ford illa ▁from ▁the ▁Brow ns ▁P ond ▁Form ation ▁of ▁New ▁York ▁and ▁An se ▁Mar anda ▁Form ation ▁of ▁Quebec ▁have ▁been ▁re ass igned ▁to ▁P oj eta ia ▁run neg ari . ▁ ▁Other ▁foss ils ▁Add itional ▁foss ils ▁have ▁been ▁attributed ▁to ▁the ▁genus ▁since ▁its ▁description . ▁ ▁A ▁foss il ▁from ▁North ▁Att le bor o , ▁Massachusetts ▁was ▁placed ▁in ▁the ▁genus ▁by ▁Sh aler ▁and ▁Fo er ste ▁in ▁ 1 8 8 8 , ▁however ▁this ▁spec imen ▁was ▁later ▁determined ▁to ▁be ▁a ▁possible ▁foss il ▁of ▁Her ault ia . ▁ ▁F oss ils ▁form ▁Hart sh ill , ▁North ▁War wick shire , ▁England ▁and ▁the ▁lower ▁Camb rian ▁of ▁Portugal ▁have ▁been ▁tent atively ▁placed ▁into ▁Ford illa ▁without ▁assignment ▁to ▁species . ▁ ▁Spec im ens ▁from ▁Zar ago za , ▁Spain ▁were ▁placed ▁into ▁Ford illa ▁with ▁the ▁name ▁Ford illa ▁mar ini ▁but ▁the ▁size ▁and ▁shape ▁of ▁the ▁spec im ens ▁indicates ▁they ▁do ▁not ▁belong ▁to ▁the ▁genus . ▁ ▁The ▁crypt ic ▁genus ▁Bul un iella ▁and ▁species ▁B . ▁bore alis ▁was ▁described ▁in ▁ 1 9 8 6 ▁by ▁V . ▁J erm ak ▁from ▁three ▁foss ils ▁found ▁in ▁Northern ▁Si ber ia . ▁ ▁The ▁two ▁right ▁and ▁one ▁left ▁dis art ic ulated ▁val ves ▁known ▁show ▁a ▁slightly ▁convex ity ▁of ▁the ▁h inge , ▁central