Untitled Document



      Cambrian
      Fossils in the Bright
      Angel Shale

      of
      Northern Arizona

      Trilobite
      Cephalon Section

      Includes:
      Cranidium, Librigena (free cheek), Hypostome (oral cover)

      (Zacanthoides
      Walapai)

       
A nearly complete specimen from the SW Locality
near Ashfork.


Updated 6/22/17
 
      The predominant
      trilobite found at our "SH Locality" in northern Arizona
      is Zacanthoides Walapai. This very primitive middle Cambrian
      trilobite is charecterized by a large cephalon and narrow tapering
      thorax and small fan like tail. Here we will only be covering
      the parts of the cephalon.

      Here is a guide
      to some of the features you will see in these images. Ive taken
      typical specimens and labeled them appropriately.



       
Cranidium Features
(click to enlarge to full size)

       
Librigena Features
(click to enlarge to full size)

       
Hypostome Features
(click to enlarge to full size)

Photo Section - 400 sized seen here, click for 800 size.
Cranidiums
 

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)




      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

  
Microscope images, 10x
 

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)


Librigena
 

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)


Microscope images, 10x
 

      
(click to enlarge to full size)


Hypostomes
 

      
    

(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
    

(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)



      
(click to enlarge to full size)

      
(click to enlarge to full size)

      
(click to enlarge to full size)


Paleo HOME
Cambrian Fossils in the Bright Angel Shale

of Northern Arizona

Trilobite Cephalon Section

Includes: Cranidium, Librigena (free cheek), Hypostome (oral cover)

(Zacanthoides Walapai)
