Diversity of cretaceous gymnosperms in the Alchan Depression of Primorye

The diversity of Cretaceous gymnosperms from the Alchan Depression in northwestern Primorye is discussed. The pike of gymnosperm diversity is restricted to the middle of the Late Albian, and a sharp decline took place in the terminal Albian. A new species, Dictyozamites serafimae sp. nov., is described.