Crinoid - Cactocrinus arnoldi
Small slab of limestone with two 3D crinoids. The larger specimen shows a stem with the calyx attached and an array of arms. From the famous old locality at Gilmore City, Iowa.
Carboniferous, Mississippian
Gilmore City, Iowa, USA
Matrix 8.5 x 6.5 cm
Largest Crinoid 4.5 cm long.
