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First Evidence of Bees Nesting in Fossil Bones Found in Dominican Cave

CT scans reveal smooth, wax‑lined brood cells in fossil cavities, a trace fossil the team names Osnidum almontei.

Overview

  • Researchers working in Cueva de Mono in the southern Dominican Republic report bee brood cells preserved inside tooth sockets, vertebrae and a sloth tooth cavity.
  • Generations of barn owls left dense accumulations of prey bones in the cave, creating hollow cavities that later served as ready‑made nest sites for burrowing bees.
  • CT imaging documents smooth, waterproof linings characteristic of solitary bees and shows repeated reuse, including six stacked chambers inside a single hutia tooth socket.
  • The team hypothesizes that karst terrain with little stable topsoil steered bees to exploit sheltered cave sediments and existing bone hollows rather than dig surface burrows.
  • No bee bodies were preserved in the humid cave environment, so the maker species and precise ages remain uncertain within the late Quaternary range.