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A FOSSIL LITHOSPERMUM (BORAGINACEAE) FROM THE TERTIARY OF SOUTH DAKOTA
Author(s) -
Gabel Mark L.
Publication year - 1987
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.1537-2197.1987.tb08769.x
Subject(s) - boraginaceae , biology , extant taxon , botany , paleontology , evolutionary biology
Silicified nutlets of a Lithospermum from the Late Miocene Ash Hollow Formation of Bennett County, South Dakota, are described. Lithospermum dakotense sp. nov. shows similarities in size, shape, attachment, and epidermal cell patterns to extant Lithospermum species. Fossil nutlets were preserved in various stages of maturity. This is the first description of definite Lithospermum nutlets from Tertiary strata of North America.