Robuta

https://repository.si.edu/items/1e5fde55-cf78-4e88-95d1-3d8c39123a5b The Okmulgee, Oklahoma fossil flora, a Mazon Creek equivalent: Spatial conservatism in the... Abstract Temporal compositional conservatism of late Middle Pennsylvanian wetland vegetation and persistence of its dominance-diversity structure through time... a mazon