Other echinoderms

Echinoderms are marine invertebrates with radial symmetry and include starfish, sea urchins, sand dollars, and crinoids.

ech1
Pelmatozoan columnals; 50 mm long. Collected by Brandon Bialy.
ech2
Pelmatozoan holdfast; 3.4 cm wide. Discovered in the Tichenor Limestone by Jerry Bastedo.
ech3
An encrusted crinoid calyx; 3.4 cm wide. Discovered in the Windom Shale by Chris Cuviello.
ech4
An echinoderm holdfast growing on a horn coral. Collected from the lower Windom Shale by Jerry Bastedo.
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