Two Fossil Crinoids (Cercidocrinus) - Iowa

This is two fossil crinoids (Cercidocrinus) from the Gilmore City Formation,Gilmore City, Iowa. They are .7" and .4" respectively and show a small portion of the stem, calyx (body) and pinnules (feeding arms) of both individuals. The rock has been meticulously removed using air abrasives, to reveal the beautiful structure of this crinoid.

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.


Comes with an acrylic stand.
DETAILS
SPECIES
Cercidocrinus cirrifer
LOCATION
Gilmore City, Iowa
FORMATION
Gilmore City Formation
SIZE
.7" larger crinoid, .4" smaller crinoid, 2.4 x 1.4" rock
CATEGORY
SUB CATEGORY
ITEM
#114373
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