Crinoids are filter feeders. Most crinoids obtain their nutrition by spreading their feeding arms to sieve the passing sea water for microscopic organisms and detritus, they are attached to the sea bottom by a stalk. Crinoids comprise three basic sections; the stem, the calyx, and the arms. They inhabited and flourished in the warm shallow seas of the paleozoric era.
These crinoid stems are great fossil for putting in kits, or for educational purposes. There are approximately 120 pcs per kg.
This fossil is sold in 25kg/55lb boxes.
Dimensions: Sizes vary
Location: Sahara desert, Morocco
Age: Devonian: 359-416 MYO
Type: Representative specimens