SOME FERN-LIKE FRUCTIFICATIONS AND THEIR 



SPORES FROM THE MAZON CREEK COMPRESSION 



FLORA OF ILLINOIS (PENNSYLVANIAN) 



H. W. Pfefferkorn, 1 R. A. Peppers, 1 and T. L. Phillips 2 



ABSTRACT 



Some species of fertile foliage and their spores are described from iron- 

 stone nodules of the Francis Creek Shale Member of the Carbondale Formation (Penn- 

 sylvanian) of Illinois. The Francis Creek Shale is Desmoinesian and in European 

 terminology probably Westphalian D in age. 



Spores in situ from the fructifications were examined by light microscopy 

 and scanning electron microscopy and compared with dispersed spores. The forms 

 described are listed below. 



Megafossil 



STELLATHECA Danze 



Stellatheca latiloba Danze 



Stellatheca ornata (Lesquereux) comb. nov. 



MYRIOTHECA Zeiller 



Myriotheca scaberrima (Lesquereux) Sellards 

 Myriotheca arnoldi sp. nov. 



CORYNEPTERIS Bailey 



Corynepteris (ex Alloiopteris ) cf . erosa 



ASTEROTHECA Pre si 



Asterotheca (ex Pecopteris ) sp. 1 \ 

 Asterotheca (ex Pecopteris) sp. 2 J 



Asterotheca (ex Pecopteris ) sp. 3 "1 

 Asterotheca (ex Pecopteris) sp. 4 J 

 Asterotheca (ex Pecopteris) cf . miltoni 



SCOLECOPTERIS Zenker 



? Scolecopteris sp. 1 

 ? Scolecopteris sp. 2 



Name of comparable 

 dispersed spore 



? Apiculatasporites , ? Microreti- 

 culatisporites , ? Foveospor- 

 ites, ? Cyclograni s porite s 



Camptotriletes triangularis 

 ? Punctatisporites , ? Calamospora 



Apiculatisporis setulosus 



Lae vig ato s porite s minutus 



Punctatisporites minutus 

 Cyclograni sporites aureus 



Punctatisporites sp. 



Lae vigatos porite s globosus 



Illinois State Geological Survey, Urbana, Illinois 61801 

 Department of Botany, University of Illinois, Urbana, Illinois 61801 



