Krassilovianthus gen. nov., a new staminate inflorescence with similarities to Platanaceae and Hamamelidaceae from the Cenomanian–Turonian of western Kazakhstan

Staminate inflorescences from Cenomanian-Turonian deposits of the Sarbay locality of western Kazakhstan are described as Krassilovianthus gen. nov. The new genus is characterized by the unique structure of the flower, which is unknown in similar platanoid heads. Flowers of Krassilovianthus gen. nov. possess a perianth that is considerably longer than its two stamens. The stamens are bisporangiate and dithecate, with small tricolporate pollen grains. Platanoid reproductive organs and leaves found at the Sarbay locality are considered.

► A new genus was described from the Cenomanian-Turonian, western Kazakhstan. ► Krassilovianthus gen. nov. is unique in the flower structure among platanoid heads. ► The flower possesses a perianth which is considerably longer than their two stamens. ► The stamens are bisporangiate and dithecate, pollen is small and tricolporate.