Lower to middle Permian Riepetown Formation

White Pine County, Nevada

Conodonts (minute tooth to jaw-like structures, unrelated to modern jaws, that served as a unique food-gathering apparatus in an extinct lamprey eel-like animal) from the lower to middle Permian Reipetown Formation (formerly called the Rib Hill Sandstone), White Pine County, Nevada. Photograph courtesy David L. Clark; I edited and processed the image through photoshop. Specimens: 1-2--Anchignanthodus minutes; 3--Anchignanthodus typicalis; 4-5 New genus; 6-7--Idiognanthodus ellisoni; 8-11--Neogondolella biselli; 12-18--Sweetognanthus whitei.

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