Thursday, December 29, 2011

Brevispirifer gregarius Textbook Specimen

This Brevispirifer gregarius is almost a textbook example of a fossil specimen. Included with this posts are the illustrations from Henry Nettelroth's Fossil Shells of the Silurian and Devonian of Kentucky from 1889. That book referred to this fossil as a Spirifera gregaria (Clapp, 1857).  These fossils are used as identification markers for the stratigraphic layers in the Jeffersonville Limestone. Devonian fossil was found in Jefferson County, Kentucky, USA. 

1 comment:

Anonymous said...

Thanks Mike - This helps clear up the "Brevispirifer gregarius" ID for me. Now I'm sure I have a Brevispirifer and not "Fimibrispirifer grieri" - looking forward to adding a Fimibrispirifer to my Devonian collection someday. Regards - Jack