| Conodonts (minute tooth or jaw-like structures, unrelated to modern jaws, that served as a unique feeding apparatus in an extinct lamprey eel-like animal) from the lower Ordovician House Limetone, western Millard County, Utah, a number of miles east of the eastern border of White Pine County, Nevada. Specimens: A--Aloxoconus iowensi; B--Paltodus sp.; C--Hirsutodontus simpex; D--Iapetognathus sp. Photograph courtesy M. M. Craig; I edited and processed the image through photoshop. |