Ordovician
Flexicalymene meeki
Upper Ordovician
Richmond Group
Butler Co., Ohio
Trilobite
Pterinea demissa
Upper Ordovician
Richmond Group
Hamilton Co., Ohio
Pelecypod (clam)
Lituites (Trilacinoceras)
hunanense
Middle Ordovician
Baota Fm.
Hunan Prov., China
Nautiloid
Cnemidopyge nuda
Middle Ordovician
Middle Llandeilo Series
Powys, Wales
Trilobite
Chaulistomella inequistriata
Middle Ordovician
Bromide Fm.
Carter Co., Oklahoma
Brachiopod
Climacograptus sp.
Middle Ordovician
Elnes Fm.
Slemmestad, Norway
Graptolites
Isorophus cincinnatiensis
Upper Ordovician
Boone Co., Kentucky
Edrioasteroids
Pleurocystites squamosus
Upper Ordovician
Bob Caygeon Limestone
Ontario, Canada
Cystoid (2 views)
Flexicalymene retrorsa
Upper Ordovician
Arnheim Fm.
Highland Co, Ohio
Trilobites
Neseuretus tristani
Middle Ordovician
Llandeilo Fm.
Solano, Spain
Trilobite
Ampyx linleyensis
Middle Ordovician
Hope Shale Fm.
Shropshire, England
Trilobite
Ceraurus pleurexanthemus
Middle Ordovician
Neuville Fm.
Quebec City, Canada
Trilobite
Didymograptus protobifidus,
Didymograptus sp.,
Schizograptus spectabilis &
Tetragraptus serri
Lower Ordovician
Bendigonian Slate
Victoria, Australia
Graptolites
Homotelus bromidensis
Middle Ordovician
Bromide Fm.
Carter Co., Oklahoma
Trilobite
Lituites lituus
Middle Ordovician
Grey Limestone
Ooland, Sweden
Nautiloid
Leperditia sp.
Lower Ordovician
Fillmore Fm.
Millard Co., Utah
Ostracods
Ampyx nasuta
Ordovician
Morocco
Trilobite
Norinia convexa
Lower Ordovician
China
Trilobite
Oklahomacystis tribrachiatus
Middle Ordovician
Bromide Fm.
Murray Co., Oklahoma
Paracrinoids
unidentified crinoids
Ordovician
SW Ohio
Crinoids
Ampullaster ubaghsi
Ordovician
Morocco
Starfish