Ptychopetalum

Citations total:
2
link From To Geolocation Author - title Year
details Middle Eocene Early Oligocene Mississippi Frederiksen,N.O. Mid-Tertiary climate of southeastern Unites States: The sporomorph evidence. 1980
details Middle Eocene Early Oligocene Alabama Frederiksen,N.O. Mid-Tertiary climate of southeastern Unites States: The sporomorph evidence. 1980