Top--Latex casts of graptolites (revealing original three-dimensional morphology of the extinct colonial animal) from a late middle Ordovician section of the middle to upper Ordovician Vinini Formation in Eureka County, a number of miles west of the western borner with White Pine County, Nevada. Called scientifically Climacograptus caudatus (11 and 12) and Climacograptus bicornis (13). Photograph courtesy Rueben J. Ross and William B. N. Berry; I edited and processed the image through photoshop.

Bottom--Graptolites from an upper Ordovician section of the middle to upper Ordovician Vinini Formation. Genus-species is Rectograptus abbreviatus. Photograph courtesy Petr Storch, Charles E. Mitchell, Stanley C. Finney, and Michael J. Melchin; I edited and processed the image through photoshop.