Pterotocrinus acutus Crinoid Fossil

The fossil pictured appears to be a Pterotocrinus acutus (Wetherby, 1879) crinoid calyx. It was found in the Glen Dean Formation of Grayson County, Kentucky, USA. The fossil is almost 3 cm wide and a view from the top shows pinnules. This animal dates to Chesterian, Upper Mississippian Period.

Thanks to Kenny for the image.

See more images of crinoids like this at Don R. Chesnut's web page on fossils of the Sloans Valley Member (Paragon Formation).

http://www.uky.edu/OtherOrgs/KPS/stratigraphicfauna/sloansvalleymacrofauna/pages/sloansvalleyechinodermata.html

Bumastus Trilobite Fossil

This posting shows an almost fully intact Bumastus barriensis (Murchison) prone trilobite. It was found in the Silurian Period Wenlock series of Dudley Worcestershire England. Image taken August 2016.

Finding an intact Bumastus trilobite in the Waldron Shale is what I consider to be a Holy Grail fossil.

This is probably the best I have found so far:
http://louisvillefossils.blogspot.com/2010/06/bumastus-niagarensis-trilobite.html

Sagenocrinites expansus Crinoid Fossil

This image shows an intact Sagenocrinites expansus (Phillips) crinoid calyx fossil. It was found in the Silurian Period Wenlock series of Dudley Worcestershire England. Image taken August 2016. The fossil was on display at the British Natural History Museum.