Grewingkia canadensis
(Ordovician), Madison, Indiana
Phylum Cnidaria, Class Anthozoa
Favistina stellata (Ordovician), Madison, Indiana
Phylum Arthropoda, Class Trilobita
Flexicalymene meeki
(Ordovician), Madison, Indiana
Isotelus maximus (hypostome)
(Ordovician), Madison, Indiana
Phylum Mollusca, Class Bivalvia
Anomalodonta gigantea
(Ordovician), Madison, Indiana
Ischyrodonta elongata (Ordovician), Madison, Indiana
Phylum Mollusca, Class Gastropoda
Cyclonema sp.
(Ordovician), Madison, Indiana
cf. Clathrospira sp.
(Ordovician), Madison, Indiana
Loxoplocus bowdeni
(Ordovician), Madison, Indiana
Phylum Mollusca, Class Cephalopoda
Platystrophia cf. P. acutilirata (Ordovician), Madison, Indiana
Orthoconic nautiloids: cf. Cameroceras sp. (?) (Ordovician),
Madison, Indiana
Phylum Ectoprocta
Phylum Brachiopoda
Lepidocyclus capax
(Ordovician), Madison, Indiana
Platyceras cf. P. bucculentum (Devonian), Silica Formation, Sylvania, Ohio
Sphaerexochus romingeri
(cephalon) Silurian.  Indiana
Platyceras cf. P. dumosum var. rarispina (Devonian), Silica Formation,
Sylvania, Ohio
Phacops rana, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Palaeozoic Fossils from Indiana and Ohio
Mucrospirifer mucronatus, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Paraspirifer bownockeri, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Phylum Echinodermata
Arthroacantha carpenteri, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Cyrtina hamiltonensis, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Unidentified "spirifer", Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Strophodonta demissa, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
cf. Megastrophia concava, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Pseudoatrypa devoniana, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Atrypa sp., Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Heliophyllum sp. (Devonian), Silica Formation, Lucas County,
Sylvania, Ohio
Aulopora microbuccinata (Devonian -
growing on
Strophodonta demissa),
Silica Formation, Lucas County,
Sylvania, Ohio
Aulocystis flabellata
(Devonian), Silica Formation,
Lucas County, Sylvania, Ohio
Unidentified Coral (Devonian),
Silica Formation, Lucas County,
Sylvania, Ohio
Platyceras cf. P. dumosum var. rarispina (Devonian), Silica Formation,
Sylvania, Ohio
Fenestella sp. (Devonian), Silica
Formation, Sylvania, Ohio
Unidentified Bryozoan
(Devonian), Silica Formation,
Sylvania, Ohio
Unidentified Bryozoan
(Devonian), Silica Formation,
Sylvania, Ohio
Crinoid columns / stems, Silica Formation (Devonian), Lucas County, Sylvania, Ohio
Unidentified bivalve from limestone quarry, Woodville, Ohio
(upper Orodvician? Lower Silurian?)