Modocia Trilobites

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Modocia weeksensis (type 1)

Weeks Formation

Millard County, UT
Cambrian

 

Here is the second most common trilobite found in the Weeks Formation. The Modocia weeksensis is commonly found without free cheeks, but a specimen of this quality is found very infrequently. The right free cheek on this specimen is slightly pushed in. This very nice trilobite measures almost 1 1/4" long.

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Modocia weeksensis (type 3)

Weeks Formation

Millard County, UT
Cambrian

 

Here is the only known complete specimen of Modocia weeksensis (type 3) known from the Weeks Formation. This trilobite has small nodes running down all the axial rings of the trilobite and has longer genal spines than the typical Modocia weeksensis (type 1). This trilobite is very similar to the Modocia sp. that is found out of the Marjum Formation. This trilobite is extremely well preserved and measures 1 1/4" long.