Leioproctus ammophilus, or Leioproctus (Leioproctus) ammophilus, 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 ammophilus (Greek: "sand lover") refers to the habitat at the collection sites.
Description The holotype male body length is 9.2 mm, head width 3.0 mm; a female paratype body length 9.8 mm, head width 3.1 mm. Integumental colouration is mainly black, with brown markings. The hair is white to brown.
Distribution and habitat The species occurs in south-eastern Australia. The type locality is the Hattah-Kulkyne National Park in north-western Victoria. It has also been recorded from 35 km south-west of Pinnaroo, South Australia.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Aotus subspinescens, as well as Dillwynia and Hibbertia species.
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