This gastropod fossil was seen at the New Harmony Indiana USA Working Men's Institute Museum & Library in June 2020. It was identified as a Maclurites (Lesueur. 1818). The fossil dates to Middle Ordovician Period. Found in the Bobcaygeon Formation. It has a special significance because the fossil was named by naturalist Charles Alexandre Lesueur for geologist William Maclure. Both of these people lived at New Harmony in the 1820s.
