▁Classification ▁ ▁Classification ▁of ▁the ▁sau rop ods ▁has ▁largely ▁stabil ised ▁in ▁recent ▁years , ▁though ▁there ▁are ▁still ▁some ▁un cert aint ies , ▁such ▁as ▁the ▁pla cement ▁of ▁Eu hel opus , ▁H ap loc anth osa urus , ▁Job aria ▁and ▁Nem eg t osa ur idae . ▁▁ ▁Cl ad ogram ▁after ▁an ▁analysis ▁presented ▁by ▁S ander ▁and ▁colle agues ▁in ▁ 2 0 1 1 . ▁ ▁References ▁▁ ▁Bob ▁Stra uss , ▁ 2 0 0 8 , ▁Sau rop ods : ▁The ▁Big gest ▁Din osa urs ▁that ▁Ever ▁L ived , ▁The ▁New ▁York ▁Times ▁ ▁Krist ina ▁Cur ry ▁Rog ers ▁and ▁Jeff rey ▁A . ▁Wilson , ▁ 2 0 0 5 , ▁The ▁Sau rop ods : ▁E volution ▁and ▁Pale obi ology , ▁University ▁of ▁California ▁Press , ▁Ber keley , ▁▁ ▁Up ch urch , ▁P ., ▁Bar rett , ▁P . M . ▁and ▁D od son , ▁P . ▁ 2 0 0 4 . ▁Sau rop oda . ▁In ▁The ▁Din osa uria ' ', ▁ 2 nd ▁edition . ▁D . ▁We ish amp el , ▁P . ▁D od son , ▁and ▁H . ▁O sm ól ska ▁( eds .). ▁University ▁of ▁California ▁Press , ▁Ber keley . ▁P p .   2 5 9 – 3 2 2 . ▁▁▁ ▁Category : N or ian ▁first ▁appearances ▁Category : Ma astr icht ian ▁ext in ctions ▁Category : Art icles