Dasyhesma abnormis is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1935 by Australian entomologist Tarlton Rayment.
Body length of females is about 9 mm. Colouring is mainly black.
The species occurs in south-west Western Australia. The type locality is Gnangara, a suburb of Perth.
The adults are flying mellivores.