2 1/3-3 miles north of Ava (Ordovician to of the United States)

Where: Douglas County, Missouri (37.0° N, 92.7° W: paleocoordinates 23.0° S, 81.0° W)

• coordinate based on nearby landmark

When: Jefferson City Formation, Tulean to Tulean (480.8 - 470.0 Ma)

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Preservation: cast, original aragonite, replaced with calcite

Primary reference: E. O. Ulrich, A. F. Foerste, A. K. Miller and W. M. Furnish. 1942. Ozarkian and Canadian cephalopods, Part I: Nautilicones. Geological Society of America Special Papers 37:1-157 [B. Kröger/B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98444: authorized by Björn Kröger, entered by Björn Kröger on 06.10.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Endocerida - Proterocameroceratidae
Mcqueenoceras jeffersonense
Mcqueenoceras jeffersonense Ulrich and Foerste 1936
 Ellesmerocerida - Ellesmeroceratidae
Diaphoroceras avaense
Diaphoroceras avaense Ulrich et al. 1944
USNM 109450
 Tarphycerida - Estonioceratidae
Aphetoceras subcostulatum, Pycnoceras clausum
Aphetoceras subcostulatum Ulrich et al. 1942
several specimens
Pycnoceras clausum Ulrich et al. 1942
 Multiceratoidea - Bassleroceratidae
Avaoceras longidomum, Avaoceras magnisiphonatum
Avaoceras longidomum Ulrich et al. 1944
Avaoceras magnisiphonatum Ulrich et al. 1944