Glossary entry - List of taxa
Mollusca - mollusks > Cephalopoda - cephalopods > Orthocerida > Orthoceratidae
Pleurorthoceras clarksvillense (Foerste, 1924)
Arthropoda - arthropods > Merostomata > Eurypterida - eurypterid > Megalograptidae
Megalograptus williamsae (Caster & Kjellesvig-Waering, 1964)
Echinodermata - echinoderms > Edrioasteroidea > Isorophida > Carneyellidae
Carneyella pilea (Hall, 1866)