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Name:
Cheirocystis anatiformis
Age: Upper Ordovician
Formation: Rust Formation, Trenton Group
Location: Walcott-Rust Quarry, Trenton Falls, New York
Size: Plate is almost 8 inches across
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This is a rare US echinoderm. It is a fine Cheirocystis anatiformis from the famous Walcott-Rust Quarry near Trenton Falls, New York. This type is one of the original fossils that Charles D. Walcott and James Hall made famous a century ago! This specimen has its long stem intact, which is quite unusual. The cystoid has good detail preserved,. But the most interesting feature of this fossil is that it seems the stem of the cystoid is attached to a bryozoan colony! Anyone who knows anything about the history of US fossils knows how important a cystoid from this locality is - it is a piece of history. This is an extremely rare example of a Cheirocystis anatiformis cystoid still attached to a bryozoan colony.
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