Leioproctus parvus, or Leioproctus (Goniocolletes) parvus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by Australian entomologist Glynn Maynard in 2013.
Etymology The specific epithet parvus (Latin: "little") refers to relative size.
Description Female body length is about 11 mm, male body length 9 mm. Integumental colouration is mainly black; the female metasoma orange with dark patches. The hair is mostly yellow.
Distribution and habitat The species occurs in arid inland Australia. The type locality is 32 km north-east of Eucla, in western South Australia.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus argillacea, Eucalyptus oleosa, Eucalyptus socialis, Eucalyptus brachycalyx, Melaleuca lanceolata and Myoporum platycarpum.
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