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Pollen of Ephedra from the Chinle Formation (Upper Triassic) and the Genus Equisetosporites

Richard A. Scott
Micropaleontology
Vol. 6, No. 3 (Jul., 1960), pp. 271-276
DOI: 10.2307/1484233
Stable URL: http://www.jstor.org/stable/1484233
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Pollen of Ephedra from the Chinle Formation (Upper Triassic) and the Genus Equisetosporites
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Abstract

Recently discovered pollen grains with asymmetrically ridged ektexines from the Chinle formation (Upper Triassic) represent the extant genus Ephedra. The holotype specimen of Equisetosporites chinleana Daugherty is also a conspecific Ephedra pollen grain, and the species is transferred to form the new combination Ephedra chinleana (Daugherty) R. A. Scott. Since this species was its genotype, the genus Equisetosporites Daugherty should be abandoned.

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