| Unspecified conodonts (minute jaw or tooth-like structures, unrelated to modern jaws, that served as a unique food-gathering apparatus in an extinct lamprey eel-like animal) from the middle to upper Devonian Guilmette Formation, Lincoln County, Nevada, a number of miles south of White Pine County, Nevada. Red scale bar at upper left is one millimeter long (3/64 of an inch). Photograph courtesy Andrew Retzler; I edited and processed the image through photoshop. |