The name of this fossil, Holonema rugosum, translates to “rugnose threaded fish.”

The name of this fossil, Holonema rugosum, translates to "rugnose threaded fish."

The specimen, Holonema rugsum, was found by a farmer ploughing his field in Susquehanna County in 1882. The fossil represents an impression of the bone of an ancient fish that once live in Pennsylvania.

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