Genomic adaptations to aquatic and aerial life in mayflies and the origin of insect wings

Isabel Almudi, Joel Vizueta, Christopher D.R. Wyatt, Alex de Mendoza, Ferdinand Marlétaz, Panos N. Firbas, Roberto Feuda, Giulio Masiero, Patricia Medina, Ana Alcaina-Caro, Fernando Cruz, Jessica Gómez-Garrido, Marta Gut, Tyler S. Alioto, Carlos Vargas-Chavez, Kristofer Davie, Bernhard Misof, Josefa González, Stein Aerts, Ryan ListerJordi Paps, Julio Rozas, Alejandro Sánchez-Gracia, Manuel Irimia, Ignacio Maeso, Fernando Casares

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


The evolution of winged insects revolutionized terrestrial ecosystems and led to the largest animal radiation on Earth. However, we still have an incomplete picture of the genomic changes that underlay this diversification. Mayflies, as one of the sister groups of all other winged insects, are key to understanding this radiation. Here, we describe the genome of the mayfly Cloeon dipterum and its gene expression throughout its aquatic and aerial life cycle and specific organs. We discover an expansion of odorant-binding-protein genes, some expressed specifically in breathing gills of aquatic nymphs, suggesting a novel sensory role for this organ. In contrast, flying adults use an enlarged opsin set in a sexually dimorphic manner, with some expressed only in males. Finally, we identify a set of wing-associated genes deeply conserved in the pterygote insects and find transcriptomic similarities between gills and wings, suggesting a common genetic program. Globally, this comprehensive genomic and transcriptomic study uncovers the genetic basis of key evolutionary adaptations in mayflies and winged insects.

Original languageEnglish
Article number2631
JournalNature Communications
Issue number1
Publication statusPublished - 1 Dec 2020


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