4.1" Bolaspidella & Elrathia Trilobite Cluster - Utah

This is a cool cluster of 505 million year old trilobite fossils from the famous Wheeler Shale of Utah. The larger trilobite is a 1.1" long Elrathia kingii and there are seven small Bolaspidella housensis clustered around it.

Comes with a display stand.

Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet: over 25,000 species have been described, filling nearly every evolutionary niche. Due in large part to their hard exoskeletons (shells), they left an excellent fossil record.
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DETAILS
SPECIES
Bolaspidella housensis & Elrathia kingii
LOCATION
U-Dig Quarry, House Range, Utah
FORMATION
Wheeler Shale
SIZE
Rock 4.1x2.9", Elrathia 1.1"
SUB CATEGORY
ITEM
#105527
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