Leioproctus clarki, or Leioproctus (Leioproctus) clarki, 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 about 11 mm. Integumental colouration is mainly black; abdomen olive green; hair is white to dark grey.
Distribution and habitat The species occurs across much of southern Australia. The type locality is Perth.
Behaviour The adults are flying mellivores.
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