1.5" Silurian Crinoid (Siphonocrinus) Fossil - Iowa

This is a crinoid (Siphonocrinus nobilis) fossil from the Silurian-aged Hopkinton Formation in Cedar County, Iowa.

Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum; such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). They first appeared in the Ordovician (488 million years ago) and some species are still alive today.
FOR SALE
$7
DETAILS
SPECIES
Siphonocrinus nobilis
LOCATION
Cedar County, Iowa
FORMATION
Hopkinton Formation
SIZE
1.5" wide
CATEGORY
SUB CATEGORY
ITEM
#216476
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