Where: Douglas County, Missouri (36.0° N, 92.6° W: paleocoordinates 23.1° S, 83.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Roubidoux Formation, Stairsian (488.3 - 478.6 Ma)

• Unit 17 of Ava section. Age from Repetski et al. 1998 (pp. 109-115, Technical Report NPS/NRGRD/GRDTR-98/1).

Environment/lithology: lithified chert

Size class: macrofossils

Collected by R. L. Heller in 1948-49

• Specimens housed at the University of Missouri

Primary reference: R. L. Heller. 1954. Stratigraphy and paleontology of the Roubidoux Formation of Missouri. State of Missouri Department of Business and Administration, Division of Geological Survey and Water Resources 1-60 [P. Wagner/P. Wagner/P. Wagner] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 114591: authorized by Melanie Hopkins, entered by Melanie Hopkins on 17.08.2011