365 A Late Cambrian (Sunwaptan) silicified trilobite fauna from Nevada

At Barton Canyon, Cherry Creek Range, east-central Nevada, a two-meter interval of the Bullwhacker Member of the Late Steptoean-Sunwaptan Windfall Formation has yielded abundant silicified sclerites. This Late Sunwaptan (Late Cambrian) assemblage, assigned to the informal Bowmania lassieae fauna, is correlative with the Prosaukia pyrene Subzone of Texas, and with the uppermost Illaenuras fauna of southern Alberta. At least 15 species are present, and these represent 14 genera: Cherrycreekia and Glaberaspis are new. New species are Prosaukia oldyelleri, Sunwaptia plutoi, Euptychaspis dougali, Eurekia rintintini, Bowmania lassieae, Cherrycreekia benjii, and Glaberaspis scoobydooi.

    

J.M. Adrain, S.R. Westrop

Pages: 56, 19 pls., 4 text-figs.