This is the “Fossil Friday” post #155.  Expect this to be a somewhat regular feature of the website.  We will post any fossil pictures you send in to esconi.info@gmail.com.  Please include a short description or story.  Check the #FossilFriday Twitter hash tag for contributions from around the world!

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Isotelus is a trilobite from the middle and upper Ordovician period.  It’s been found in the northeastern US and Canada.  One specimen, an Isotelus rex, found in Manitoba is the largest complete trilobite fossil ever found.   In 1985, the state of Ohio designated Isotelus as its State Fossil.

Today, we have an Isotelus specimen from ESCONI member Connor Puritz.  It’s enrolled and a little flattened but most everything is there.  Connor found this specimen earlier this spring.  It was found is a deposit of the Maquoketa Group (Upper Ordovician) in northern Illinois.   Thanks for sharing, Connor!