†Micrhystridium gregarium Sargeant 1975

Sargeant 1975. Acritarchs and tasmanitids from the Mianwali and Tredian Formations (Triassic) of the Salt and Surghar Ranges, West Pakistan. Memoirs Can. Soc. Petrol. Geol, No. 2,1973 1975: 35-73