| Isotelus "mafritzae" Lindsay Fm. Colbourne, Ontario, Canada Size: The trilobite is about 3.5 cm across the cephalon. Price: $30 US ID number: fs666 | 
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| Isotelus "mafritzae" Lindsay Fm. Colbourne, Ontario, Canada Size: The trilobite is about 3.5 cm across the cephalon. Price: $30 US ID number: fs666 |
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