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Animalia | Arthropoda | Insecta | Diptera | Athericidae and Paleontology--Colorado--Teller County and Atrichops hesperius and Animalia | Arthropoda | Insecta | Diptera | Athericidae by Cockerell%252C+Theodore+D.+A.+%2528Theodore+Dru+Alison%2529%252C+1866-1948%252C+author and Cockerell%252C+Theodore+D.+A.+%2528Theodore+Dru+Alison%2529%252C+1866-1948%252C+author
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