Author:
Smith,P.L.;Beyers,J.M.;Carter,E.S.;Jakobs,G.K.;Paley,J.;Pessagno,E.;Tipper,H.W.
Year:
1994
Title:
North America
Reference:
Smith,P.L. et al. (1994) North America Newsletters on Stratigraphy Vol. 31 # 1 P. 33- 70
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Genus Species Country(Region) From To
Dictyotidium Dictyotidium eastendense North America Early Sinemurian Toarcian
Leiosphaeridia Leiosphaeridia tangentensis North America Early Sinemurian
Micrhystridium Micrhystridium polyedricum North America Early Sinemurian