Bisporangiostrobus

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details Nd Nd Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. 1995
original Late Strunian Pennsylvania Chitaley,S.D. et al. Bisporangiostrobus harrisii, gen.et sp.nov., an eligulate Lycopsid cone with Duosporites megaspores and Geminospora microspores from the Upper Devonian of Pennsylvania, USA. 1988