State Fossils
Illinois
Tullimonstrum gregarium (Pennsylvanian “Tully Monster”) (see Region 2: Mazon Creek box)
Indiana
Indiana has no state fossil.
Iowa
Iowa has no state fossil.
Michigan
Mammut americanum (American Mastodon) (Figure 3.30)
Minnesota
Minnesota has no state fossil.
Ohio
Isotelus maximus (Ordovician trilobite) (Figure 3.7A)
Wisconsin
Calymene celebra (Ordovician trilobite) (Figure 3.7B)