Diacalymene is a genus of trilobite from the order Phacopida, suborder Calymenina.

It includes the species D. ouzregui, D. clavicula,[2] D. diademata and D.

[1] It lived in the Ordovician[3] and Silurian periods.

[1] Fossils of the genus have been found in:[4] This Phacopida-related article is a stub.

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