Diacalymene

Diacalymene is a genus of trilobite from the order Phacopida, suborder Calymenina. It includes the species D. ouzregui, D. clavicula, D. diademata and D. gabrielsi. It lived in the Ordovician and Silurian periods.

Distribution
Fossils of the genus have been found in:


 * Ordovician
 * Cabano, Jupiter and White Head Formations, Quebec, Canada
 * Ktaoua Formation, Morocco
 * Dufton Shale, United Kingdom


 * Silurian
 * Lipeón Formation, Argentina
 * Cariy Sandstone, Paraguay
 * Motol and Zelkovice Formations, Czech Republic
 * Henryhouse Formation and St. Clair Limestone, United States