Weeksina unispina Trilobite from Weeks Formation

Name: Weeksina unispina Trilobite

Trilobita Trilobites Order Ptychopariida, Superfamily Ptychparioidea, Family Lonchocephalidae

Geological Time: Upper Middle Cambrian

Size: 11 mm

Fossil Site: Weeks Formation, House Range, Millard County, Utah

WeeksinaThis is a rarely seen specimen of a trilobite of the Order Ptychopariida, known as Weeksina unispina. It is easy to see where the genus derives its name. They possess a single spine on the 7th axial lobe, the source of the name of the genus.

click trilobite pictures to enlarge
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