Author:
Millay,M.A.;Eggert,D.A.
Year:
1974
Title:
Microgametophyte development in the Paleozoic seed fern Family Callistophytaceae.
Reference:
Millay,M.A. et al. (1974) Microgametophyte development in the Paleozoic seed fern Family Callistophytaceae. American Journal of Botany Vol. 61 # 10 P. 1067- 1075
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Genus Species Country(Region) From To
Callandrium Callandrium callistophytoides Illinois Late Pennsylvanian
Idanothekion Idanothekion glandulosum Illinois Middle Pennsylvanian
Vesicaspora Vesicaspora Illinois Middle Pennsylvanian
Vesicaspora Vesicaspora Illinois Late Pennsylvanian