Pachyprosopis grossoscapus, or Pachyprosopis (Parapachyprosopis) grossoscapus, is a species of bee in the family Colletidae and subfamily Euryglossinae. It is endemic to Australia. It was described by Australian entomologist Elizabeth Exley in 1976.
Etymology The specific epithet grossoscapus refers to "the thick antennal scapes characteristic of this species".
Description The holotype male body length is about 4.0 mm, wing length 2.8 mm; female allotype body length 4.5, wing length 3.0 mm. Integumental colouration is mainly black and yellow or reddish-orange; the hair is sparse and white.
Distribution and habitat The species occurs in tropical northern Australia. The type locality is 24 km south-west of Kununurra in the Kimberley region of northern Western Australia.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Eucalyptus pruinosa and Eucalyptus argillacea.
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