The original description of Acercularia profunda Hall, is found in Hall's Report on the Geological Survey of Iowa, published in l858. The specimens on which the species was founded came from near Independence, in Buchanan County, Iowa. In the same report Professor Hall, not without some hesitation identifies another form found abundantly throughout the Devonian area in Iowa, with Acercularia davidsoni Edwards and Haine. This so far as I have been able to ascertain, was the first time the name had been employed in a work published in America; for although Edwards and Haine's specimens came from near Jeffersonville, Indiana, the description of Acercuilaria davidsoni appeared in the great Monograph of the authors, published in France. It should be noted that near Jeffersonville, Indiana, there occurs another form which authors, following the example of Edwards and Haines, usually refer to Cyathophyllum rugosum Hall.
Proceedings of the Iowa Academy of Sciences
©1890 Iowa Academy of Science, Inc.
"Note on the Differences between Acervularia profunda Hall, and Acervularia davidsoni Edwards and Haine,"
Proceedings of the Iowa Academy of Science, 1(Pt. 2), 30-32.
Available at: https://scholarworks.uni.edu/pias/vol1/iss2/20