Halysiocrinus sp with Archimedes sp
Beautifully preserved 3D articulated Crinoid showing stalk, calyx and arms. Lying amongst debris of the lace Bryozoan Archimedes sp. Fine detail under magnification.
Carboniferous, Late Mississippian, Borden Formation.
Princeton, Kentucky, USA.
Crinoid : 5.8 cm long.