Leioproctus pachyramus, or Leioproctus (Euryglossidia) pachyramus, 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 pachyramus (Latin: "thick-branched") is an anatomical reference to the inner tooth of the claws.
Description The female body length is 6.6 mm. Integumental colouration is mainly black, with a dark brown metasoma. The hair is white to brown.
Distribution and habitat The species occurs in south-west Western Australia. The type locality is 15 km north of Westonia in the Wheatbelt.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Grevillea teretifolia.
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