Cambrian of North America
21st January 2008

This is a small selection of North American Cambrian fossils to complement those shown in the Cambrian echinoderm and soft-part preservation in trilobites galleries.

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Vauxia, 50 mm sponge, Burgess Shale, British Columbia, Canada.
Vauxia, 50 mm sponge, Burgess Shale, British Columbia, Canada.
 Canadaspis perfecta, 50 mm long showing excellent preservation of abdomen and limbs. Burgess Shale, Middle Cambrian. British Columbia, Canada.
Canadaspis perfecta, 50 mm long showing excellent preservation of abdomen and limbs. Burgess Shale, Middle Cambrian. British Columbia, Canada.
 Sidneyia inexpectans, 12 cm long showing excellent preservation. Burgess Shale, Middle Cambrian. British Columbia, Canada.
Sidneyia inexpectans, 12 cm long showing excellent preservation. Burgess Shale, Middle Cambrian. British Columbia, Canada.
 Marella splendens, 16 mm in ventral view, Burgess Shale, BC, Canada. The Taphonomy of the Greater Phyllopod Bed community has been analysed by Caron & Jackson (2006) who concluded that the animals were preserved within their habitat with only minor disturbance during burial.
Marella splendens, 16 mm in ventral view, Burgess Shale, BC, Canada. The Taphonomy of the Greater Phyllopod Bed community has been analysed by Caron & Jackson (2006) who concluded that the animals were preserved within their habitat with only minor disturbance during burial.
Bathyuriscus howelli. Middle Cambrian. Stephen Formation, Mount Stephen, British Columbia, Canada. 30 mm complete, excellent
Bathyuriscus howelli. Middle Cambrian. Stephen Formation, Mount Stephen, British Columbia, Canada. 30 mm complete, excellent
 Olenellus gilberti. Excellent 25 mm olenellid trilobite with spines, Early Cambrian. C- Shale, Combined Metals Member, Pioche Shale Formation, Lincoln County, Nevada, USA.
Olenellus gilberti. Excellent 25 mm olenellid trilobite with spines, Early Cambrian. C- Shale, Combined Metals Member, Pioche Shale Formation, Lincoln County, Nevada, USA.
 Olenellus chiefensis. Excellent 42 mm olenellid trilobite with spines, Early Cambrian Pioche Fm, Lincoln County, Nevada, USA.
Olenellus chiefensis. Excellent 42 mm olenellid trilobite with spines, Early Cambrian Pioche Fm, Lincoln County, Nevada, USA.
 Crummillospongia a group of “purse sponges” from 13 to 25 mm. Wheeler Shale, Millard County, Utah. The Demosponge Crumillospongia belongs to the family Hazeliidae.
Crummillospongia a group of “purse sponges” from 13 to 25 mm. Wheeler Shale, Millard County, Utah. The Demosponge Crumillospongia belongs to the family Hazeliidae.
Choia carteri, three individuals, the largest measuring 45 mm, in association with a Portalia specimen. Wheeler Shale, Millard County, Utah.
Choia carteri, three individuals, the largest measuring 45 mm, in association with a Portalia specimen. Wheeler Shale, Millard County, Utah.
 Chancelloria penctata, 60 mm at left, a coeloscleritophoran. Wheeler Shale, Millard County, Utah.
Chancelloria penctata, 60 mm at left, a coeloscleritophoran. Wheeler Shale, Millard County, Utah.
Excellent 100 mm priapulid. Middle Cambrian. Millard County, Utah, USA.
Excellent 100 mm priapulid. Middle Cambrian. Millard County, Utah, USA.
Priapulid worm, Selkirkia willoughbyi, 31 mm, showing gut trace and proboscis. Marjum Formation.
Priapulid worm, Selkirkia willoughbyi, 31 mm, showing gut trace and proboscis. Marjum Formation.
Unknown vermiform soft-bodied animal with a jaw apparatus at one end with individual pointed elements reaching 4 mm, 32 mm long. Upper Middle Cambrian, Weeks Formation. Millard County, Utah.
Unknown vermiform soft-bodied animal with a jaw apparatus at one end with individual pointed elements reaching 4 mm, 32 mm long. Upper Middle Cambrian, Weeks Formation. Millard County, Utah.
 Pseudarctolepis sharpi, (Brooks & Caster 1956) 60 mm, Middle Cambrian, Marjum Formation, Millard County, Utah.
Pseudarctolepis sharpi, (Brooks & Caster 1956) 60 mm, Middle Cambrian, Marjum Formation, Millard County, Utah.
Excellent 9 mm paired ostracode valves. Middle Cambrian. Millard County, Utah, USA.
Excellent 9 mm paired ostracode valves. Middle Cambrian. Millard County, Utah, USA.
Modocia typicalis, 36 mm trilobite. Marjum Formation, Millard County, Utah.
Modocia typicalis, 36 mm trilobite. Marjum Formation, Millard County, Utah.
Altioculus drumensis, 52 mm, Order Ptychopariida. Middle Cambrian, Marjum Formation, Drum Mountains, Millard County, Utah.
Altioculus drumensis, 52 mm, Order Ptychopariida. Middle Cambrian, Marjum Formation, Drum Mountains, Millard County, Utah.
 Coosella sp. Type I, 32 mm, a rare Weeks Formation trilobite.
Coosella sp. Type I, 32 mm, a rare Weeks Formation trilobite.
 Tricrepicephalus coria. 55 mm, with a number of brachiopods. Upper Middle Cambrian. Weeks Formation. Utah, USA.
Tricrepicephalus coria. 55 mm, with a number of brachiopods. Upper Middle Cambrian. Weeks Formation. Utah, USA.
 Genevievella granulatus 25 mm long. Upper Middle Cambrian. Weeks Formation.
Genevievella granulatus 25 mm long. Upper Middle Cambrian. Weeks Formation.
Genevievella granulatus and Coosella with several Cedaria. Weeks Formation, Upper Middle Cambrian, Utah. Largest Genevievella is 25 mm.
Genevievella granulatus and Coosella with several Cedaria. Weeks Formation, Upper Middle Cambrian, Utah. Largest Genevievella is 25 mm.
 Dresbachia amata, 17 mm. Rare Weeks Formation trilobite, Upper Middle Cambrian. Millard County, Utah.
Dresbachia amata, 17 mm. Rare Weeks Formation trilobite, Upper Middle Cambrian. Millard County, Utah.
 Large mature Elrathia kingi, 44 mm, Middle Cambrian, Marjum Formation, Millard County, Utah. Thought to be diagnostic of an “exaerobic zone” environment (Gaines & Droser 2005).
Large mature Elrathia kingi, 44 mm, Middle Cambrian, Marjum Formation, Millard County, Utah. Thought to be diagnostic of an “exaerobic zone” environment (Gaines & Droser 2005).
 Margaretia dorus, 140 mm kelp-like brown alga, Middle Cambrian, Marjum Formation, Millard County, Utah.
Margaretia dorus, 140 mm kelp-like brown alga, Middle Cambrian, Marjum Formation, Millard County, Utah.
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