Description
A beautiful 9 cm Mesonacis cf. fremonti collected from the D-Shale Delamar Member of the Pioche Shale in the late 1990’s. This specimen is perfect with an incredibly long tail spine, reminiscent of the Bristolia species it shares these rock with. We’ve seen just two other examples with tail spines of this length. It’s likely these spines were easily damaged in daily life. The trilobite is slightly offset from center on an attractive e triangular matrix piece. The specimen is even more impressive in person, serving as a collection centerpiece. It certainly serves as a conversation piece in our lab! This is easily one of the finest examples of this species available.
*A side note-Olenellus trilobites of this quality are extremely rare. The specimens offered here were collected from the 1980’s through the early 2000’s and represent the top 1%.
Age: Lower Cambrian
Species Name: Mesonacis cf. fremonti
Order / Family: Redlichiida / Olenellidae
Locality: Lincoln County, Nevada
Formation: Pioche Shale











