This is the "Fossil Friday" post #29. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to [email protected]. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world!
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For this Fossil Friday, we are highlighting a specimen of Isotelus . Isotelus is a genus of asaphid trilobites that lived during the middle and upper Ordovician period. This little guy is an enrolled and hails from the state of Ohio, where his species, Isotelus maximus, is the state fossil. One of the telltale characteristics to distinguish Isotelus maximus from Isotelus gigus, is the presence of genial spines. I. maximus has them and I. gigus doesn't.
