Gabb, W. M. (1860). Descriptions of new species of American Tertiary and Cretaceous fossils. Journal of the Academy of Sciences of Philadelphia, Second Series. 4: 375-404, pls. 67-69.
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Gabb, W. M.
1860
Descriptions of new species of American Tertiary and Cretaceous fossils
Journal of the Academy of Sciences of Philadelphia, Second Series