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Middle Cambrian
Spence Shale
(approx. 520 million years ago)

WELLSVILLE MOUNTAINS (WM) - BOX ELDER CO., UTAH
and
BEAR RIVER RANGE (BRR)
- CACHE CO., UTAH

 


  Glossopleura gigantea
   Courtesy:  The Gunther Family
   Size: 5.3" (13.5 cm)
   Remarks:  WM
 
 
ZOOM | TAXONOMY

  Amecephalus  laticaudum
   Courtesy: The Gunther Family
   Size: 2.1" (5.4 cm)
   Remarks:  = Alokistocare laticaudum
   WM
 
ZOOM | TAXONOMY

  Zacanthoides grabaui
   Courtesy: The Gunther Family
   Size: 2.6" (6.6 cm)
   Remarks:  WM
 
 
ZOOM | TAXONOMY

  Athabaskia wasatchensis
   Courtesy: The Gunther Family
   Size: 1.34" (3.4 cm)
   Remarks:  WM
 
 
ZOOM | TAXONOMY

  Kootenia spenci  &  Athabaskia bithus 
   Courtesy:  The Gunther Family
   Size: 5.0 cm and 3.4 cm
   Remarks:  WM
 
 
ZOOM | TAXONOMY 1 | TAXONOMY 2

  Athabaskia sp.

   Courtesy: The Gunther Family
   Size: 2.6" (6.6cm)
   Remarks:  tenatively A. howelli
   WM
 
ZOOM | TAXONOMY

  Glossopleura sp. 
   Courtesy:  The Gunther Family
   Size:  2.6" (6.6 cm)
   Remarks:  WM
 
 
ZOOM | TAXONOMY

  Athabaskia bithus
   Courtesy: The Gunther Family
   Size: 2.4" (6.1 cm)
   Remarks:  WM
 
 
ZOOM | TAXONOMY

  Glossopleura bion
   Courtesy: The Gunther Family
   Size: 3 9" (10.1 cm)
   Remarks:  w/bite mark on pygidium
   WM
 
ZOOM | TAXONOMY

  Zacantoides idahoensis
   Courtesy:The Gunther Family
   Size:  2.5" (6.3 cm)
   Remarks:  Val Gunther photo
   WM
 
ZOOM | TAXONOMY

  Gogia guntheri
   Courtesy:  R.A. Robison
   Size:  
   Remarks:  Holotype specimen
   WM
 
ZOOM | TAXONOMY

  Palaeoscolex ratcliffei
   Courtesy: UofU
   Size:  cm scale
   Remarks:  Holotype specimen
   WM
 
ZOOM | TAXONOMY

  Gogia sp.
   Courtesy:  QJS/UofU
   Size: slab 12.6"X9.8" (32X25cm)
   Remarks:  BRR
 
 
ZOOM | TAXONOMY

  Gogia sp.
   Courtesy:  QJS/UofU
   Size:  slab 9.8"x9.1" (25x23 cm)
   Remarks:  BRR
 
 
ZOOM | TAXONOMY

  Gogia sp.
   Courtesy:   QJS/UofU
   Size:  
   Remarks:  BRR 
 
 
ZOOM | TAXONOMY

  Amecephalus  idahoense
   Courtesy:  Scott Hill/UofU
   Size:  1.06" (2.7 cm)
   Remarks:   =Alokistocare idahoense
   BRR
 
ZOOM | TAXONOMY
Last Updated: 4/1/20