Where: Illinois (41.3° N, 88.3° W: paleocoordinates 4.7° S, 23.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Francis Creek Shale Member (Carbondale Formation), Westphalian D (309.8 - 307.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: deltaic; lithified, concretionary, ferruginous mudstone

Size class: macrofossils

Preservation: mold/impression, concretion

Collection methods: Repository: Lauer Foundation for Paleontology, Science, and Education (Wheaton, Illinois)

Primary reference: V. E. McCoy, J. Wittry, H. Sadabadi and P. Mayer. 2023. A reappraisal of Nemavermes mackeei from the Mazon Creek fossil site expands Carboniferous cyclostome diversity. Journal of Paleontology 97:1116-1132 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 233234: authorized by Matthew Clapham, entered by Matthew Clapham on 25.01.2024

Creative Commons license: CC BY (attribution)