Holotypes of ancient plants: a new addition to the paleobotanical collection of the State Darwin Museum

Sergey Vladimirovich Naugolnykh, our friend and the Professor of the Russian Academy of Sciences, Doctor of Geological and Mineralogical Sciences, contributed unique items to the paleobotanical collection of the State Darwin Museum. The new addition includes the holotypes of such ancient plants as Gracilopteris lonchoghylloides Naugolnykh, Sphenobaiera kungurica Naugolnykh, and Walchia bardaeana Zalessky found in the geological Lower Permian deposits of the Urals. A holotype is a typical example of the biological species. 

The holotype of Gracilopteris Ionchoghylloides Naugolnykh. Found in the Middle Urals, Perm Krai, left coast of the Sylvy river, the Chekarda-1 location.

The holotype of Sphenobaiera kungurica Naugolnykh. Found in the Middle Urals, Perm Krai, left coast of the Bardy river, the Krutaya Katushka-2 location. 

The holotype of Walchia bardaeana Zalessky. Found in Perm Krai, right coast of the Bardy river, the Krasnaya Glinka location.