Cordualadensa acorni

Aug. 30, 2025

Recently, researchers from McGill University identified a new dinosaur-era dragonfly fossil named Cordualadensa acorni from Alberta’s Dinosaur Provincial Park.

About Cordualadensa acorni

  • It represents the first Mesozoic dragonfly fossil in Canada and fills a 30-million-year evolutionary gap in dragonfly history.
  • The fossil is a partial wing impression fossil preserved in the 75-million-year-old Dinosaur Park Formation (UNESCO World Heritage Site, Alberta, Canada).
  • The fossil led to the creation of a new family, Cordualadensidae, highlighting its unique anatomical features.

Features of Cordualadensa acorni

  • Wingspan: Roughly the width of a human hand.
  • Anatomy: The wing structure indicates adaptation for gliding flight, a feature common in migratory dragonflies
  • Ecological Role: Though small, it would have been an important part of the Cretaceous ecosystem, possibly serving as prey for raptors.

Distribution & Significance

  • First dinosaur-aged dragonfly fossil discovered in Canada.
  • It is the first North American member of the dragonfly group Cavilabiata.
  • Before this, only one insect fossil (a microscopic aphid in amber) had been reported from the region.

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