Rare
Trilobite Fossils
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Lower
Ordovician
Order Asaphida
Family Asaphidae
Fillmore Formation, Utah |
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Ordovician
Order Lichida
Family Odontopleuridae
Tazzarine, Morocco |
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Lower
Ordovician
Order Asaphida
Family Asaphidae
Table Head Formation Newfoundland, Canada
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Lower
Cambrian
Order Redlichiida
Family Archaeaspididae
Inyo-White Mountains, California |
Lower
Devonian
Order Lichida
Family Lichidae
Haragan Formation, Oklahoma
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Middle
Cambrian
Order Agnostida
Subfamily Ammagnostinae
Weeks Formation, Utah
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Silurian
Order
Phacopida
Family Calymenidae
Jupiter Formation, Quebec, Canada
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