Cactocrinus imperator
Mississippian (Kinderhookian)
Gilmore City Formation
Pocahontas County
Iowa, USA.
A large fossil limestone slab preserving an exceptional multi-specimen assemblage of Cactocrinus imperator, a striking Mississippian-age crinoid commonly referred to as a “sea lily.” This specimen contains at least 11 individual crowns, most of which remain attached to articulated stem segments, representing a highly desirable multi-organism preservation surface.
Huge Cactorinus slab with at least 11 crowns, most with stems