Hyolithid Fossils
Phylum Hyolitha
Geological Time: Lower Cambrian
Size (25.4 mm = 1 inch): Hyolithid 25 mm; matrix ~ 65 x 50 mm
Fossil Site: Pioche Shale, Nevada
Fossil Code: INV11
Price: $24.00
The Hyolithids are an extinct group of problematic animals that appeared in the Cambrian and persisted into the Permian. They had a long, conically-shaped, closed shell, with a lid (operculum) covering the opening, and a pair of long, horn-like outgrowths. The animal lived on the sea-bottom, or partly buried. They are
usually
classified as a Mollusk, though as a distinct separate class. They reached
their peak in the Cambrian and declined thereafter.
This plate has one large Hyolithid with the orangish fossils contrasting with the tan shale. They come from the famous, Lower Cambrian, Pioche Shale in Nevada where they are sometimes found in association with Olenellid trilobtes.
Add a new Class of fossil animal not often offered to your fossil collection.
