Platyclymenia is a genus of ammonites belonging to the family Platyclymeniidae.

These fast-moving nektonic carnivores lived in the Devonian period, Famennian stage (364.7 to 360.7 Ma).

[1][2] Species within the genus Platyclymenia include:[2] Shells of Platyclymenia species can reach a diameter of 0.7–47 millimetres (0.028–1.850 in).

[3][4] Fossils of species within this genus have been found in the Devonian sediments of Australia, China, Morocco, Poland and United States.

This Clymeniida-related article is a stub.