Both free cheeks present and tucked under.
Hard to obtain in this size and quality.
Good quality complete enrolled specimens.
Good/very good quality complete enrolled specimens.
Rare, enrolled meraspid (juvenile) trilobites.
trilobites. Each is similar to that shown.
Complete trilobite with both free cheeks and pygidium present. Henryhouse Formation, Oklahoma.
Florena Shale, Kansas. Measures ~10 mm wide.