238-e. 3 miles west of Steelville (Ordovician of the United States)

Where: Crawford County, Missouri (38.0° N, 91.4° W: paleocoordinates 23.3° S, 81.1° W)

When: Rossodus manitouensis conodont zone, Hystricurus Zone Member (Gasconade Dolomite Formation), Tremadocian (485.4 - 477.7 Ma)

• near top of Gasconade Dolomite

• group of beds-level stratigraphic resolution

Environment/lithology: dolomite

Size classes: macrofossils, mesofossils

Preservation: recrystallized, original aragonite

Primary reference: E. O. Ulrich, A. F. Foerste, and A.K. Miller. 1943. Ozarkian and Canadian cephalopods. Part II, Brevicones. Geological Society of America Special Papers 49:1-240 [P. Wagner/P. Wagner/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189340: authorized by Björn Kröger, entered by Björn Kröger on 12.10.2017, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Euomphalina - Macluritidae
Macluritella uniangulata Hall 1847 snail
Summer 1991 Smithsonian Collections
 Eogastropoda - Sinuopeidae
Gasconadia putilla Sardeson 1896 snail
Summer 1991 Smithsonian Collections
Cephalopoda
 Ellesmerocerida - Ellesmeroceratidae
Clarkoceras modestum Ulrich et al. 1943
Eremoceras subrectum Ulrich et al. 1943
Conocerina missouriensis Ulrich et al. 1943
Conocerina beani Ulrich et al. 1943