Xanthesma argosomata, or Xanthesma (Xanthesma) argosomata, is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1969 by Australian entomologist Elizabeth Exley.
The species occurs in southern South Australia. The type locality is Tusmore in Adelaide. It has also been recorded from Meningie.
The adults are solitary flying mellivores that nest in soil. Flowering plants visited by the bees include Eucalyptus species.