| Greenops widderensis Widder Fm. Arkona, Ontario, Canada Size: 8.9 cm across the slab. Price: $200 US ID number: d1010 | 
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| Greenops widderensis Widder Fm. Arkona, Ontario, Canada Size: 8.9 cm across the slab. Price: $200 US ID number: d1010 |
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