Where: Illinois (42.0° N, 88.0° W: paleocoordinates 26.2° S, 49.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Lecthaylus Shale Member (Racine Dolomite Formation), Ludlow (427.4 - 423.0 Ma)

• Listed as earliest Ludlovian. Saetograptus colonus and Monograptus dubius age

• formation-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, gray, argillaceous dolomite

Size classes: macrofossils, mesofossils

Preservation: trace, soft parts, replaced with pyrite

Primary reference: S. T. LoDuca and C. E. Brett. 1987. The Medusaegraptus epibole and Lower Ludlovian Konservat-Lagerstätten of eastern North America. In C. E. Brett, G. C. Baird (eds.), Paleontological Events: Stratigraphic, Ecological, and Evolutionary Implications 369-406 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 76450: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 20.11.2007

Creative Commons license: CC BY (attribution)