Vojnovskyales in the Lower Permian of North America

Sergius H. Mamay

doi:10.54991/jop.1976.1018

Authors

Sergius H. Mamay U.S. Geological Survey, Washington, D.C., U.S.A.

DOI:

https://doi.org/10.54991/jop.1976.1018

Abstract

Lower Permian rocks of the south-western United States contain dissociated fossil plant parts that suggest the presence of a vojnovskyalean taxon in North America. Leaves, seeds, and especially one incomplete strobiloid organ are suggestive of the original Vojnovskya paradoxa from the Permian of the U.S.S.R. Other reports of Vojnovskya in the U.S.S.R., as well as one from Argentina, are on record.

Vojnovskya is a gymnosperm of uncertain affinities. If definitely established in the future, its presence in the Palaeozoic of the U.S.S.R., North America and South America will present problems of seed-plant evolution and plant dispersal, and may add a modicum to the evidence bearing on distribution of living populations of land organisms.

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