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Cambrian Explosion Fossils for Sale

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Cambrian Explosion Fossils Page: 1 - 2 - 3 - 4 - 5

Emeraldellidae; cf Emeraldella-Like (?) Soft Bodied Arthropod from Utah
Taxonomy: Phylum Arthropoda, Superclass Lamellipedia (sensu Hou & Bergström, 1997), Lamellipedia (Trilobitomorpha); Emeraldellidae; cf Emeraldella (?)
Geological Time: Middle Cambrian
Size: 28 mm on 53 mm x 50 mm matrix
Fossil Site: House Range, Weeks Formation, Millard County, Utah
Item: R8W030
Price: SOLD
Remarks: This is an enigmatic soft bodied athropod having strong resemblance to Emeraldella that is described from the Burgess Shale. Such soft-tissue preservation is a rare occurence. Such arthropods are believed to be closely related to trilobites. In fact, Cambrian arthropods were once commonly grouped in the "trilobitomorpha", which was once considered to be an arthropod subphylum. Note the tail spine preservation, which is also a rare occurence in such fossils from the Cambrian of Utah.

Reference:
The Virtual Fossil Museum: Aglaspida and Emeraldellida

Briggs D.E.G., and R.A. Robison. 1984. Exceptionally preserved non trilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions, Paper 111:1-24.

Hou & Bergström, 1997: Arthropods of the Lower Cambrian Chengjiang fauna, southwest China. --Fossils & Strata, Number 45, 22nd December 1997, pp. 1-116

Cambrian Explosion Seafloor Arthropod Mortality plate
Taxonomy: Incertae sedis, Phylum Arthropoda (?), Trilobitomorpha or Lamellipedia
Geological Time: Middle Cambrian
Size: Left to right 10 mm, 16 mm, 15 mm, 21 mm, 16 mm, 14 mm on 300 mm x 235 mm matrix
Fossil Site: House Range, Weeks Formation, Millard County, Utah
Item: R8W036
Price: $750.00
Remarks: This large plate from a Cambrian seafloor contains six enigmatic soft bodied animal fossils, putatively arthropods. All are rare, and none are complete as is the normal case for soft bodied fossils from Cambrian Utah, and it is exceptionally unusual to find so many on a single plate. Cambrian Utah is poorly studied compared to the famous Burgess Shale and Chengjiang localities, and soft bodied preservation like this is rare. Arthropods radiated prodigiously during the Cambrian explosion, and many are believed related to trilobites. In fact, Cambrian arthropods were once commonly grouped in the "trilobitomorpha", which was once considered to be an arthropod subphylum. Several of the arthropods in this plate resemble Superclass Aglaspida (or Aglaspidida), a group of small, horseshoe crab-like arthropods that were once regarded as basal or ancestral horseshoe crabs, but believed to be a distinct group closely related to trilobites. Whatever these are, this is an impressive plate encoding seafloor life during the Cambrian Explosion.

References:
The Virtual Fossil Museum: Trilobite Relatives and Ancestors - Aglaspida Fossils - Aglaspidida

Briggs D.E.G., and R.A. Robison. 1984. Exceptionally preserved non trilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions, Paper 111:1-24.
Cambrian Explosion Seafloor Arthropod Mortality Plate
Taxonomy: Incertae sedis, Phylum Arthropoda (?), Trilobitomorpha or Lamellipedia
Geological Time: Middle Cambrian
Size: Left to right 15 mm, 15 mm, 14 mm, 16 mm, 5 mm, 14 mm on 290 mm x 235 mm matrix
Fossil Site: House Range, Weeks Formation, Millard County, Utah
Item: R8W037
Price: $300.00
Remarks:This large plate from a Cambrian seafloor contains six enigmatic soft bodied animal fossils, putatively arthropods. All are rare, and none are complete as is the normal case for soft bodied fossils from Cambrian Utah, and it is exceptionally unusual to find so many on a single plate. Cambrian Utah is poorly studied compared to the famous Burgess Shale and Chengjiang localities, and soft bodied preservation like this is rare. Arthropods radiated prodigiously during the Cambrian explosion, and many are believed related to trilobites. In fact, Cambrian arthropods were once commonly grouped in the "trilobitomorpha", which was once considered to be an arthropod subphylum. Several of the arthropods in this plate resemble Superclass Aglaspida (or Aglaspidida), a group of small, horseshoe crab-like arthropods that were once regarded as basal or ancestral horseshoe crabs, but believed to be a distinct group closely related to trilobites. Whatever these are, this is an impressive plate encoding seafloor life during the Cambrian Explosion.

References:
The Virtual Fossil Museum: Trilobite Relatives and Ancestors - Aglaspida and Emeraldellida

Briggs D.E.G., and R.A. Robison. 1984. Exceptionally preserved non trilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions, Paper 111:1-24.
Brachiocaris sp.
Taxonomy: Phylum Arthropoda, Subphylum Crustacea, Class Malacostraca, Subclass Phyllocarida
Geological Time: Middle Cambrian
Size: 47 mm x 72 mm (Not including soft material) on 135 mm x 155 mm matrix
Fossil Site: House Range, Wheeler Formation, Millard County, Utah
Item: SFS003
Price: Sold
Remarks: Seems to have survived a previous injury and appears to have some soft tissue at the posterior end.Phyllocarids are one of the lesser known branchiopod crustaceans from the Cambrian where they are among the earliest animals with a hard shell. They have a fairly large carapace, which protects the anterior part of the body. This structure hinged along the dorsal edge like a bivalve. Usually only the carapace is found. Rarely are the soft parts preserved in the Cambrian shales of Utah. Branchiocaris has been placed by some as a near relative of Marella of the Burgess Shale, an assignment not agreed to by all researchers. The taxon is also known from the Burgess Shale of British Columbia, while another member of the genus has been found in the Chengjiang Biota.

References:
The Virtual Fossil Museum: Trilobite Relatives and Ancestors - Aglaspida and Emeraldellida

Briggs D.E.G., and R.A. Robison. 1984. Exceptionally preserved non trilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions, Paper 111:1-24.