Goodman and Evitt, 1981
From dinoflaj3
Goodman, D.K. and Evitt, W.R., 1981: The dinoflagellate Angustidinium acribes (Davey and Verdier) gen. et comb. nov. from the mid-Cretaceous of the northern California Coast Ranges. Grana, v.20, p.43-54.