Trilobites Figured From United States Geological Survey Professional Paper 1047, Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin, by Allison R. Palmer and Robert B. Halley

Trilobites from the Lower-Middle Cambrian Carrara Formation, Death Valley National Park. All specimens are from Plate 3, and greatly magnified. Figures 14-16 Olenellus fremonti, "all from the Funeral Mountains, showing variability of advancement of genal spine." Lower Cambrian Olenellus zone.