Isotelus

Taxobox
name = "Isotelus"
image_width = 240px
regnum = Animalia
phylum = Arthropoda
classis = Trilobita
ordo = Asaphida
familia = Asaphidae
genus = "Isotelus"

"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.

"Isotelus rex"

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). [cite journal
author = Rudkin, David M. "et al."
year = 2003
title = The World's biggest trilobite - Isotelus rex new species from the Upper Ordovician of Northern Manitoba, Canada
journal = Journal of Paleontology
volume = 77 | issue = 1 | pages = 99-112] [cite web |url=http://www.trilobites.info/lgtrilos.htm |title=The World's Largest Trilobites |date=2005-08-17 |author=S. M. Gon III] [cite web |url=http://pharyngula.org/index/weblog/comments/isotelus_rex_biggest_trilobite_ever/ |title="Isotelus rex", biggest trilobite ever |author=P. Z. Myers |date=2005-04-25] Large specimens have also been found in Ohio, where "Isotelus maximus" is the state fossil.

References