Reexamination of mesozoic canadian dinoflagellate cysts published by S. A. J. Pocock (1962, 1972)

Holotypes and some other illustrated specimens of Jurassic and Early Cretaceous dinoflagellate cysts from Canada, published by S. A. J. Pocock (1962, 1972), were reexamined for new detail and redescribed; their nomenclature has been adjusted to current usage. Not all holotypes could be located; two new lectotypes were designated. One new species, Leptodinium peromatum, is named and fifteen new combinations are proposed: Chytroeisphaeridia gochtii; Circulodinium brevispinosum, C. distinc‐tum; Endoscrinium? variabile; Evansia opeasatos, E. reticulopilosa, E. tripartita, E. tripartita subs, rotunda, E. zabra; Rhynchodiniopsis canadensis, R. downiei, R. gochtii; Scriniocassis klementii, S. reticulata; Sentusidiniwn asymmetricum.