Sarjeant, 1966c
From dinoflaj3
Sarjeant, W.A.S., 1966c: Further dinoflagellate cysts from the Speeton Clay. In: Davey, R.J., Downie, C., Sarjeant, W.A.S. and Williams, G.L., Studies on Mesozoic and Cainozoic dinoflagellate cysts; British Museum (Natural History) Geology, Bulletin, Supplement 3, p.199-214.