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. Both specimens are from Plate 13, and greatly magnified. Middle Cambrian Albertella zone, Titantothere Canyon Section, Grapevine Mountains. Mexicella grandoculus. Figure 10 is a small cranidium; Figure 5 is the top view of the holotype cranidium.