Type
Age
Age range
306–305 Ma
Pennsylvanian
Kasimovian
Dorogomilovian
Khamovnikian
Krevyakinian
306.0305.9305.9305.9305.8305.8305.7305.6305.6305.6305.5305.4305.4305.4305.3305.3305.2305.1305.1305.1305.0