Name: Kochina vestina Trilobite Order Ptychopariida,
Superfamily Ptychoparioidea, Family Ptychopariidae Locality: Utah Stratigraphy: Spence
Shale Formation, Middle Cambrian Credits: photographed by Richie Kurkewicz
Name: Esmeraldina sp. Trilobite Order Ptychopariida,
Superfamily Ptychoparioidea, Family Ptychopariidae Locality: Utah Stratigraphy: Spence Shale
Formation, Middle Cambrian Credits: Collected by Jake Skabelund; Prep and Photo
by Dave Comfort
