#gilbertsocrinus

alt: a Carboniferous crinoid (an echinoderm with radial arms jutying out of a central cup atop a stalk, like a sea flower with feathery tentacles) Gilbertsocrinus has a unique tegmen, the top part of its calyx. They are shaped like a grappling hook where five two pronged curving hooks emerge out of the tegmen. Their stalk is also unusually flexible for crinoids and have been found wrapped around other crinoid stalks, sort of like climbing vines, but animal..