Here are some illustrations of the brachiopod fossil
Productella spinulicosta
(Hall, 1867). The fossil was found in the Marcellus and Hamilton beds at Erie County,
New York, USA. The fossil dates to the Devonian Period. They were published in
Amadeus Grabau's (1870-1946) book
Geology and Palaeontology of Eighteen Mile Creek and the Lake Shore Sections of Erie County, New York from 1899. The images are from pages 205, figures 112 & 112A.
