Unusual Insect Fossils Found in S. America (Photos)A new order of insects has been discovered in South America from the Lower Cretaceous period, between 146 and 100 million years ago.SavePrintChristy Su7/19/2011|Updated: 10/1/2015We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.