Leioproctus microdontus, or Leioproctus (Exleycolletes) microdontus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by British-American entomologist Theodore Dru Alison Cockerell in 1929.
Description Female body length is just over 10 mm. Integumental colouration is mainly black; hair is white to grey and black.
Distribution and habitat The species occurs in Western Australia. The type locality is Perth.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Melaleuca species.
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