Leioproctus singularis, or Leioproctus (Euryglossidia) singularis, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Tarlton Rayment in 1935.
Description Body length is about 6 mm for both females and males. Integumental colouration is mainly dark green, with a darker abdomen; the hair is mostly white.
Distribution and habitat The species occurs in Western Australia. The type locality is Merredin.
Behaviour The adults are flying mellivores.
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