Order Corynexochida, Family Alokistocaridae
Time: Middle Cambrian
is 3.5 cm in length
Glossopleura Zone, Chisholm Shale, Lincoln County, Nevada
The Chisholm Shale trilobites were discovered and described in
1870s by geologists of the Wheeler Survey. They were found in the
mine tailings surrounding the infamous wild west town of Pioche.
Amecephalus piochensis is one of these classic trilobite species.
fossil pictures to enlarge