Rarely-Offered Calymene clavicula natural double. This Silurian Trilobite is coming from the Silurian Henryhouse Formation of Pontotoc County, Oklahoma. The trilobite is much older than the Devonian Oklahoma trilobites and is very hard to find in good condition. To find a double is exceptional. The bigger trilobite is huge and measures 64 mm or 2.5". The size of the second trilobite is 54 mm or 2.1". Comes with a custom made stand.

Calymene clavicula

Middle Silurian (433 - 423 mil y)

Henryhouse Formation, Pontotoc County, Oklahoma, USA

140 mm - 5 3/4" (height on stand)

Very good