Saturday, June 1, 2024

Cactocrinus? Crinoid Fossil Stem

It is usually difficult to identify fossil crinoid stem pieces. So this fossil was recently found in the Jeffersonville Limestone Clark County Indiana USA. It dates to the Middle Devonian Period. The stem has some unique features so it seemed like a good candidate for trying to find its name. After some research, this fossil might be a Cactocrinus. A problem emerges in that that genus existed in the Mississippian Period and this fossil was found in much older rock.