Trilobite (Agnostus interstictus)
Bob Campbell Geology Museum 510 million years old; Formation: Wheeler Shale.
Trilobite (Asaphiscus wheeleri)
Bob Campbell Geology Museum 500 million years old; Donated: H. Abercrombie.
Trilobite (Dicranurus monstrosus)
Bob Campbell Geology Museum 380 million years old; Formation: Megrane Formation.
Trilobite (Elrathia gregoryensis)
Bob Campbell Geology Museum 530 million years old; Formation: Conasauga Formation.
Trilobite (Flexicalymene ouzregui)
Bob Campbell Geology Museum 445 million years old; Formation: Ktaoua Formation.
Trilobite (Isotelus gigas)
Bob Campbell Geology Museum 460 million years old; Formation: Magouketa Formation.
Trilobite (Philonyx sp.)
Bob Campbell Geology Museum 380 million years old; Formation: Hamar Laghdad Formation.