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Quereuxia is an extinct genus of aquatic angiosperms known from fossil leaves and leaf rosettes primarily dating to the Late Cretaceous period. It also survived into the Paleocene, with Quereuxia angulata documented as a member of aquatic plant communities persisting across the Cretaceous-Paleogene boundary in northeastern Russia. These plants are notable for their floating growth habit, with morphological features suggesting adaptation to still freshwater environments. Fossil Quereuxia leaves from the Upper Cretaceous of the Amur region in Russia preserve ovipisition marks from damselflies and dragonflies, providing evidence of plant-insect interactions in ancient freshwater ecosystems.
Fossils are known from a wide variety of locales including Russia, Austria, The United States, Canada, China, and Mongolia.
Text excerpted from the Wikipedia article Quereuxia by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
