United States Trilobites

Trilobite Fossils from United States of America

Arctinurus boltoni Silurian Order Lichida Family Lichidae Rochester Formation, New York	Hemirhodon amplipyge Middle Cambrian Order Corynexochida Family Dolichometopidae Marjum Formation, Utah	Spathacalymene nasuta Silurian Order Phacopida Family Calymenidae Ripley County, Indiana	Dipleura dekayi Middle Devonian Order Phacopida Family Homalonotidae Campito Formation, Nevada

Albertella longwelli Middle Cambrian Order Corynexochida Family Zacanhoididae Carrara Formation, Nevada	Dorypyge swasii Middle Cambrian Order Corynexochida Family Dorypygidae Marjum Formation, Utah	Albertella helena Middle Cambrian Order Corynexochida Family Zacanthoididae Gordon Shale, Montana	Bathyuriscus formosus Middle Cambrian Order Corynexochida Family Dolichometopidae Meagher Shale, Montana

Eldregeops (Phacops) rana Devonian Order Phacopida Suborder Phacopina Family Phacopidae Hamburg Group, New York	Dalmanites limulurus Silurian Order Phacopida Family Dalmanitidae Rochester Shale, New York	Pseudocybele nasuta Ordovician Order Phacopida Family Pliomeridae Fillmore Formation, Utah	Modocia hewlisca Middle Cambrian Order Ptychopariida Family Marjumiidae Weeks Formation, Utah

Lochovella (Reedops) deckeri Devonian Order Phacopida Family Phacopidae Haragan Formation, Oklahoma	Flexicalymene meeki Ordovician Order Phacopida Family Calymenidae Richmond Formation, Ohio	Eldregeops (Phacops) rana Devonian Order Phacopida Family Phacopidae Windom Shale, New York	Weeksina unispina Middle Cambrian Order Ptychopariida Family Lonchocephalidae Weeks Formation, Utah

Ogygopsis typicalis Middle Cambrian Order Ptychopariida Family Alokistocaridae Spence Shale, Utah	Bellacartwrightia whiteleyi Devonian Order Phacopida Family Acastidae Hamburg Group, New York	Greenops barberi Devonian Order Phacopida Family Acastidae Hamilton Group, New York	Pseudocybele lemurei Ordovician Order Phacopida Family Pliomeridae Fillmore Formation, Utah

Huntoniatonia (Huntonia) lingulifer Devonian Order Phacopida Family Dalmanitidae Haragan Formation, Oklahoma	Isoteloides flexus Lower Ordovician Order Asaphida Family Asaphidae Fillmore Formation, Utah	Modocia brevispina Middle Cambrian Order Ptychopariida Family Marjumiidae Marjum Formation, Utah	Flexicalymene granulosa Ordovician Order Phacopida Family Calymenidae Martinsburg Formation, Pennsylvania

Ptychagnostus atavus Middle Cambrian Order Agnostida Family Agnostoidea Wheeler Formation, Utah	Onymagnostus seminula Middle Cambrian Order Agnostida Family Agnostoidea Wheeler Formation, Utah	Lachnostoma latucelsum Middle Ordovician Order Asaphida Family Asaphidae Ninemile Shale, Nevada	Cryptolithus bellulus Late Ordovician Order Asaphida Family Trinucleidae Pulaski Shale, New York

Breviphillipsia sampsoni Mississippian Order Proetida Family Proetidae Chouteau Formation, Missouri	Asaphiscus wheeleri Middle Cambrian Order Ptychopariida Family Asaphiscidae Marjum Formation, Utah	Flexicalymene cf senaria Ordovician Order Phacopida Family Calymenidae Sugar River Formation, New York	Calymene celebra Silurian Order Phacopida Family Calymenidae Joliet Formation, Illinois

Gravcialymene sp Devonian Order Phacopida Family Calymenidae Utica Shale, New York	Ceratonurus sp Lower Devonian Order Odontopleurida Family Odontopleuridae Haragan Formation, Oklahoma	Cordania falcata Devonian Order Proetida Family Brachymetopidae Haragan Formation, Oklahoma	Ptychagnostus michaeli Middle Cambrian Order Agnostida Family Agnostoidea Marjum Formation, Utah

Baltagnostus eurypyxi Middle Cambrian Order Agnostida Subfamily Diplagnostinae Wheeler Formation, Utah	Peronopsis interstricta Middle Cambrian Order Agnostida Family Peronopsidae Wheeler Formation, Utah	Itagnostus interstrictus Middle Cambrian Order Agnostida Family Peronopsidae Wheeler Formation, Utah	Eofallotaspis Early Cambrian Order Redlichiida Subfamily Fallotaspidinae Campito Formation, Nevada The Oldest American Trilobite

Ptychopariid Trilobites Middle Cambrian Order Ptychopariida Superfamily Ptychoparioidea Weeks Formation, Utah	Ogygopsis typicalis Middle Cambrian Order Corynexochida Family Dorypygidae Spence Shale, Utah	Bonnia caperata Lower Cambrian Order Corynexochida Family Dorypygidae Inyo-White Mountains, California	Archaeaspis macropleuron Lower Cambrian Order Redlichiida Family Archaeaspididae Inyo-White Mountains, California

Athabaskia howelli Middle Cambrian Order Corynexochida Family Dolichometopidae Spence Shale, Utah	Paciphacops campbelli Devonian Order Phacopida Family Phacopidae Haragan Formation, Oklahoma	Paratrinucleus acervulosus Ordovician Order Asaphida Family Trinucleidae Table Head Formation Liberty Hall Shale, Virginia	Esmeraldina sp Lower Cambrian Order Redlichiida Family Holmiidae Esmeraldina County, Nevada

Oryctocephalites typicalis Middle Cambrian Order Corynexochida Family Oryctocephalidae Spence Shale, Utah	Modocia weeksensis and Cedaria minor Middle Cambrian Order Ptychopariida Family Ptychopariidae Weeks Formation, Utah	Elrathia kingii Middle Cambrian Order Ptychopariida Superfamily Ptychoparioidea Family Ptychopariidae Wheeler Formation, Utah	Ehmaniella quadrans Upper Cambrian Order Ptychopariida Superfamily Ptychoparioidea Family Alokistocaridae Walsey Formation, Montana

Bristolia insolens Order Redlichiida Family Olenellidae Latham Shale, California	Modocia laevinucha Middle Cambrian Order Ptychopariida Suborder Ptychopariina Family Marjumiidae Marjum Formation, Utah	Kettneraspis williamsi Lower Devonian Order Odontopleurida Family Odontopleuridae Haragan Formation, Oklahoma	Calymene breviceps Silurian Order Phacopida Superfamily Calymenoidea Family Calymenidae Waldron Shale, Indiana

Bolaspidella drumensis Middle Cambrian Order Ptychopariida Family Menomoniidae Wheeler Formation, Utah	Acanthopyge consanguinea Lower Devonian Order Lichida Family Lichidae Haragan Formation, Oklahoma	Cyphaspis carrolli Devonian Order Proetida Family Aulacopleuridae Haragan Formation, Oklahoma	Ammagnostus beltensis Middle Cambrian Order Agnostida Subfamily Ammagnostinae Weeks Formation, Utah

Utaspis marjumensis Middle Cambrian Order Ptychopariida Family Alokistocaridae Marjum Formation, Utah	Kootenia Trilobite Middle Cambrian Order Corynexochida Family Dorypygidae Marjum Formation, Utah	Marjumia callas Middle Cambrian Order Ptychopariida Family Marjumiidae Marjum Formation, Utah	Bristolia mohavensis Lower Cambrian Order Redlichiida Superfamily Olenelloidea Family Olenellidae Pioche Shale, Nevada

Homotelus bromidensis Middle Ordovician Order Asaphida Family Asaphidae Criner Hills, Carter County, Oklahoma	Triarthrus eatoni Late Ordovician Order Ptychopariida Family Olenidae Lorraine Shale, New York	Lonchocephalus plena Middle Cambrian Order Ptychopariida Family Ptychopariidae Weeks Formation, Utah	Coosella Type 1 Middle Cambrian Order Ptychopariida Family Crecicephalidae Weeks Formation, Utah

Menomonia semele Middle Cambrian Order Ptychopariida Family Ptychopariidae Weeks Formation, Utah	Gerospina schachti Middle Cambrian Order Ptychopariida Family Ptychopariidae Weeks Formation, Utah	Altiocculus harrisi Middle Cambrian Order Ptychopariida Family Alokistocaridae Wheeler Formation, Utah	Weeksina unispina Middle Cambrian Order Ptychopariida Family Lonchocephalidae Weeks Formation, Utah

Ogygopsis typicalis Middle Cambrian Order Ptychopariida Family Alokistocaridae Spence Shale, Utah	Modocia weeksensis Middle Cambrian Order Ptychopariida Family Marjumiidae Weeks Formation, Utah	Modocia laevinucha Middle Cambrian Order Ptychopariida Family Marjumiidae Marjum Formation, Utah	Amecephalus piochensis Cambrian Order Ptychopariida Family Alokistocaridae Chisholm Shale, Nevada

Bolaspidella drumensis Middle Cambrian Order Ptychopariida Family Menomoniidae Wheeler Formation, Utah	Cedaria minor Trio with Rare Agnostid Middle Cambrian Order Ptychopariida Family Cedariidae Weeks Formation, Utah	Triarthrus eatoni Ordocivian Order Ptychopariida Family Olenidae Lorraine Shale, New York	Calymene conradi Ordovician Order Phacopida Family Calymenidae Lorraine Shale, New York

American Trilobites

Trilobite Fossils from United States of America