Leioproctus sulcatus, or Leioproctus (Euryglossidia) sulcatus, 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 sulcatus is a Latin anatomical reference to the depressions in the anterior corners of the propodeal triangle.
Description The female body length is about 8 mm. Integumental colouration is mainly black, with brown markings. The hair is white to brown.
Distribution and habitat The species occurs in Western Australia. The type locality is Northcliffe in the South West region.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus species.
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