Where: Will, Grundy County, Illinois (41.3° N, 88.3° W: paleocoordinates 3.6° S, 22.4° W)
• coordinate based on nearby landmark
When: Francis Creek Shale Member (Carbondale Formation), Kasimovian (307.0 - 303.7 Ma)
• Westphalian D/ Desmoinesian
• group of beds-level stratigraphic resolution
Environment/lithology: deltaic; mudstone and sideritic ironstone
Size classes: macrofossils, mesofossils, microfossils
Preservation: cast, mold/impression, adpression, concretion, original carbon
Reposited in the USNM
Collection methods: salvage, surface (in situ), chemical, mechanical,
• Other museum repositories are the Illinois State Museum, Springfield, Illinois, the Carr Collection in the University of Illinois Natural History Museum, Urbana, Illinois, and the Field Museum of Natural History, Chicago, Illinois.
Primary reference: H. W. Pfefferkorn, R. A. Peppers, and T.L. Phillips. 1971. Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian). Illinois State Geological Survey Circular 463:1-55 [H. Pfefferkorn/A. Kidd/A. Kidd]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 33462: authorized by Hermann Pfefferkorn, entered by Amy Kidd on 31.07.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
Stellatheca latiloba Danze 1956
Stellatheca ornata Lesquereux 1884 | |
? Scolecopteris "sp. 1", ? Scolecopteris "sp. 2", Asterotheca "sp. 1", Asterotheca "sp. 2", Asterotheca "sp. 3", Asterotheca "sp. 4"
? Scolecopteris "sp. 1" Zenker 1837 The specimen used for the description lacked soral and sporangial data, which does not warrant the establishment of a new species.
? Scolecopteris "sp. 2" Zenker 1837 The specimen used for the description lacked soral and sporangial data, which does not warrant the establishment of a new species.
Asterotheca "sp. 1" Presl 1845
Asterotheca "sp. 2" Presl 1845
Asterotheca "sp. 3" Presl 1845
Asterotheca "sp. 4" Presl 1845 | |
Myriotheca | |
Myriotheca arnoldi n. sp.
Myriotheca arnoldi n. sp. Pfefferkorn et al. 1971 | |
Myriotheca scaberrima | |
Myriotheca scaberrima Lesquereux 1870 |