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Lonchocephalus plena Trilobite Middle Cambrian Suborder Ptychopariina Family Ptychopariidae Weeks Formation, Utah

Lonchocephalus plena Trilobite Middle Cambrian Suborder Ptychopariina Family Ptychopariidae Weeks Formation, Utah

Modocia weeksensis and Cedaria minor Middle Cambrian Suborder Ptychopariina Superfamily Ptychoparioidea Weeks Formation, Utah

Modocia weeksensis and Cedaria minor Middle Cambrian Suborder Ptychopariina Superfamily Ptychoparioidea Weeks Formation, Utah

Fossils

http://www.westerntrilobites.com/trilobites/oryctocephalus-nyensis/oryctocephalus-nyensis.jpg

http://www.westerntrilobites.com/trilobites/oryctocephalus-nyensis/oryctocephalus-nyensis.jpg

Olenellus terminatus Superfamily Olenelloidea Family Olenellidae Subfamily Olenellinae Lower Cambrian Pioche Shale, Nevada

Olenellus terminatus Superfamily Olenelloidea Family Olenellidae Subfamily Olenellinae Lower Cambrian Pioche Shale, Nevada

Peronopsis interstricta

Peronopsis interstricta from Wheeler Shale in Utah

Ptychagnostus atavis Agnostid Trilobites   Ptychagnostus atavus   Order Agnostida, Suborder Agnostina, Superfamily Agnostoidea, Family Ptychagnostidae  Geological Time: Middle Cambrian   Size: 3 mm - 4.5 mm  Fossil Site: Lower Wheeler Formation, Millard County, Utah

Ptychagnostus atavis Agnostid Trilobites from Wheeler Formation

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