Leioproctus minimus, or Leioproctus (Baeocolletes) minimus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by American entomologist Charles Duncan Michener in 1965.
Etymology The specific epithet minimus refers to the small size of the bees.
Description Male body length nearly 4.5 mm, forewing length nearly 3 mm. Integumental colouration mainly black and brown, hair white.
Distribution and habitat The species occurs in the Murchison region of Western Australia. The type locality is Meekatharra.
Behaviour The adults are flying mellivores.
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