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Isotelus is a genus of asaphid trilobite from the middle and upper Ordovician period, fairly common in the Northeastern United States, northwest Manitoba, southwestern Quebec and southeastern Ontario. A specimen of Isotelus rex, from Churchill, Manitoba, is the largest complete trilobite ever found. It measures 720 mm in length (over two feet four inches), 400 mm in maximum width (across the cephalon) and 70 mm in maximum height (at the posterior mid-point of the cephalon).[1][2] Large specimens have also been found in Ohio, where Isotelus maximus is the state fossil.
[edit] References
- ^ S. M. Gon III (2005-08-17). The World's Largest Trilobites.
- ^ P. Z. Myers (2005-04-25). Isotelus rex, biggest trilobite ever.
