Where: Shannon County, Missouri (37.6° N, 91.1° W: paleocoordinates 22.6° S, 86.8° W)
• outcrop-level geographic resolution
When: Pachendoceras zone, Eminence Formation, Trempealeauan (492.5 - 485.4 Ma)
• The chert in which the fossils occur may or may not be in place stratigraphically. So, a rating of "A" through "F" indicates stratigraphi reliability with "A" = no question as to stratigraphic position of horizon and "F" = residual material of different ages. RATING: D
• formation-level stratigraphic resolution
Environment/lithology: reef, buildup or bioherm; lithified chert
Preservation: original calcite, replaced with silica
Primary reference: B. L. Stinchcomb. 1986. New Monoplacophora (Mollusca) from Late Cambrian and Early Ordovician of Missouri. Journal of Paleontology 60(3):606-626 [M. Patzkowsky/P. Borkow/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 8699: authorized by Mark Patzkowsky, entered by Phil Borkow on 27.08.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
Tergomya | |
Hypseloconus ozarkensis Ulrich et al. 1931
Hypseloconus compressus Ulrich et al. 1931 |