Triarthrus spinosus & Triarthrus eatoni
Hint: spinosis has spines
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Time itself
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| Edited | 18th May 2019, 10:26 pm |
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"A fossil hunter needs sharp eyes and a keen search image, a mental template that subconsciously evaluates everything he sees in his search for telltale clues. A kind of mental radar works even if he isn't concentrating hard.", Richard E. Leakey (1992)
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Black River-Trenton Brachiopoda Cheirocystis Cobourg Cooper Crinoids Echinoderms Fossils Gatineau Hull Isotelus Pelecypoda Triarthrus Triarthrus canadensis Triarthrus spinosus Trilobita abundantly analysis animal area billings formation billings shale canada cannot certain classes conclusion corals diagnostic divisions echinoderm fauna forms genera generalized generic identification interior limestone most north america number ontario ottawa poorly preserved pseudogygites pseudogygites latimarginatus reflected represented species specimens stromatoporoids structure themselves trilobite upon upoon usually valves
