Bibliographic record

Pfefferkorn, Hermann W., 1976.

Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois. Illinois State Geological Survey Circular 492. Illinois State Geological Survey, Urbana, Illinois. 32 p.

Specimens figured in this publication:

14555, 15039, 15088, 15290, 15330, 15512, 15740, 15803, 1619, 1670a, 1720, 1747, 1782, 8666,