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Trilo-Related Gifts

Large Mississippian Comptonaspis swallowi
MISSOURI
Stock Number TTBRE705
EXTINCTIONS Choice

Name:   Comptonaspis swallowi
Age:  Mississippian
Formation:  Chouteau Formation
Location:  Saline County, Missouri
Size:  Trilobite is 0.75 inches long
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As everyone knows, complete Mississippian trilobites are quite rare. This is a large Comptonaspis swallowi from the Mississippian of Missouri. This type of trilobite has a very smooth carapace - almost totally devoid of ornamentation, quite unlike the extremely pustulose Ameropiltonia lauradanae, which is found in the same formation - but this Comptonaspis is ten times rarer than Ameropiltonia. This specimen is large for the type and very distinct. The bug is extremely inflated, and even the eyes are easily seen. The dark brown color of the trilobite contrasts wonderfully with the light-colored matrix. The bug is well showcased on the marlstone plate. This is rare complete example of this highly uncommon trilobite from the Mississippian.