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Phillipsia peroccidens cranidium / glabella


Arizona Chris

Here you can see the both the upper and lower surfaces of this rare trilobites cranidium.  There is much debate as to what the actual tubercles were used for - sensory, camouflage, or defense.  This pair of fossils were found on the Mogollon Rim in northern Arizona near the town of Young.  

 

 

Arizona Chris


From the album:

Mississippian Redwall Limestone Fossils, Arizona

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