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Ecuador Quarry Yields South America’s First Mesozoic Amber With Insects

The peer-reviewed study captures a rare Gondwanan rainforest scene, guiding new biogeographic work.

Overview

  • Published September 18 in Communications Earth & Environment, the team dated the Genoveva deposit in Ecuador’s Hollín Formation to about 112 million years ago.
  • Of 60 aerial amber pieces, 21 contained bio-inclusions spanning at least five insect orders along with a fragment of spider web.
  • Two amber types occur at the quarry—root and aerial—with biological inclusions confined to resin that hardened in air.
  • Plant fossils in the surrounding rocks indicate a humid forest of ferns and conifers with early flowering plants making up roughly 37% of the flora.
  • Researchers report the largest known Cretaceous amber occurrence in the Southern Hemisphere and continue analyses and fieldwork to expand the record.