Leioproctus hamatus, or Leioproctus (Filiglossa) hamatus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Glynn Maynard in 1994.
Etymology The specific epithet hamatus (Latin: "hooked") is an anatomical reference to the structure at the base of the mandibles.
Description Female body length is 5.5 mm. Integumental colouration is mainly black.
Distribution and habitat The species occurs in New South Wales. The type locality is Lady Carrington Drive, Royal National Park, Sydney.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Persoonia species.
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