Leioproctus comosus, or Leioproctus (Euryglossidia) comosus, is a species of bee in the family Colletidae and subfamily Colletinae. It is endemic to Australia. It was described by entomologist Michael Batley in 2025.
Etymology The specific epithet comosus (Latin: "hairy") is a reference to the female scuta.
Description The female body length is 5.8 mm. Integumental colouration is mainly black and dark brown to yellow-brown. The hair is white and brown.
Distribution and habitat The species occurs in south-west Western Australia. The type locality is Mount Gibson Sanctuary, in the Avon Wheatbelt bioregion.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Borya species.
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