Cincinnati Fossils: This site lists all fossil taxa described or reported from the type Cincinnatian strata (Upper Ordovician) of Ohio, Kentucky, and Indiana, including mollusks, arthropods, echinoderms, brachiopods, and many other groups.
Fossil Cephalopods in Utah: A reference to help provide information on the identity, biostratigraphy and location of fossil cephalopods found in the state of Utah.
Ordovician fossils of the Nashville, Tennessee region: Site lists the reported fossils from Middle and Upper Ordovician rocks of the Nashville Dome in central Tennessee.
Ordovician Fossils At Great Beatty Mudmound, Nevada: A virtual field trip to a classic 480-million-year-old fossil locality in the vicinity of Beatty, Nevada, near Death Valley National Park; detailed text; images of fossils; on-site images.
Ordovician Fossils In The Toquima Range, Nevada: Take a detailed virtual field trip to two 475-million-year-old fossil localities in central Nevada; explanatory text; images of fossils; on-site images.