Diacalymene is a genus of trilobite from the order Phacopida, suborder Calymenina. It includes the species D. clavicula, D. diademata and D. gabrielsi. It lived in the Ordovician and Silurian periods.
Distribution Fossils of the genus have been found in:Diacalymene at Fossilworks.org
Ordovician Cabano, Jupiter and White Head Formations, Quebec, Canada 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
References