Citations total:
link From To Geolocation Author - title Year
original Campanian USSR(Urals) Krutzsch,W. Information on fossil dispersed tetrad pollen. 1970
details Early Albian Middle Albian USA(Atlantic Coast.Pl.) Doyle,J.A. et al. Pollen and leaves from the Mid-Cretaceous Potomoc Group and their bearing on early angiosperm evolution. (In: Origin and Early Evolution of Angiosperms.C.B.Beck, editor) 1976
details Campanian Nd Schluter,T. The eoevolutionary relationship between angiosperm pollen and insects in the Late Mesozoic. 1987
details Cenomanian New Jersey Ward,J.V. et al. Possible affinites of two Triporoidate Tetrads from the Mid-Cretaceous of Laurasia 1988
details Middle Albian Canada(Alberta) Burden,E.T. et al. Palynomorphs of the Upper Blairmore Group, Southwestern Alberta 1990