Leioproctus nitidifuscus, or Leioproctus (Colletellus) nitidifuscus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by entomologist Remko Leijs in 2018.
Etymology The specific epithet nitidifuscus refers to the very smooth and brown integument of much of the body.
Description The female holotype body length is 4.8 mm, head width 1.5 mm. Integumental colouration is mainly black, orange and brown.
Distribution and habitat The species occurs in Western Australia. The type locality is Kalbarri National Park, in the Mid West region.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Calandrinia species.
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