【摘 要】
:
Cretaceous System is widely represented in South America. “Conchostracans” are best represented with 47 early Cretaceous species and only 5 Late Cretaceous on
【机 构】
:
CentrodeEcologí,aAplicadadelLitoral(CECOAL-CONICET-UNNE),InstitutodeGeocronologí,ayGeolog