Leioproctus xanthozoster, or Leioproctus (Odontocolletes) xanthozoster, 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 1997.
Etymology The specific epithet xanthozoster (Greek: "yellow-banded") is an anatomical reference to the metasoma.
Description Male body length is 8 mm. Integumental colouration is mainly black, with a narrow, subapical, orange band on the metasoma; the hair is mostly white to off-white.
Distribution and habitat The species occurs in arid central Australia. The type locality is 56 km south-east of Alice Springs, in the south of the Northern Territory. It has also been recorded from Welbourne Hill Station in northern South Australia.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Podolepis canescens.
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