Author:
Mamay,S.H.
Year:
1954
Title:
Two new plant genera of Pennsylvanian age from Kansas coal balls.
Reference:
Mamay,S.H. (1954) Two new plant genera of Pennsylvanian age from Kansas coal balls. United States Geological Survey, Professional Paper # 254 P. 81- 95
Google Academy:
try to search by title in english
Genus Species Country(Region) From To
Sclerocephalus Sclerocephalus oviformis sp. nov. Kansas Desmoinesian
Spore Spore sp Kansas Desmoinesian
Tyliosperma Tyliosperma orbiculatum sp. nov. Kansas Desmoinesian