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EOCENE ALGAE AND PLANT HAIRS FROM THE GREEN RIVER FORMATION OF WYOMING
Author(s) -
Bradley W. H.
Publication year - 1970
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1970.tb09872.x
Subject(s) - spirogyra , biology , algae , botany , trichome , green river formation , chlorophyceae , taxon , green algae , genus , chlorophyta , oil shale , paleontology
Four new species of algae and two kinds of fossil plant hairs are described from a rich oil shale bed of the mid‐Eocene Green River Formation of Wyoming. Two of the algae belong to the Cyanophyceae and two to the Chlorophyceae. On the basis of their morphology alone, they are assigned to four new species among four genera, as follows: Symploca hedraia , sp. n.; Stigonema anchistina , sp. n.; Schizochlamys haywellensis , sp. n.; and Spirogyra wyomingia , sp. n. One kind of fossil plant hair is similar to those observed in organic sediments of an existing lake and identified with trichomes on the under surface of live oak leaves ( Quercus virginiana ). Assignment of the fossil trichomes to a taxon is not warranted at present.