Harpers Run, T. duseri bed (Ordovician of the United States)

Where: Warren County, Ohio (39.4° N, 84.1° W: paleocoordinates 25.8° S, 57.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Aphelognathus grandis conodont zone, Fort Ancient Member (Waynesville Formation), Richmondian (449.5 - 443.7 Ma)

• Unit located about 11-13 m above Arnheim-Waynesville contact.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; blue claystone

• Deeper-water, low-energy, mud-bottom environment. Heavily oxygenated.
• Massive blue claystone.

Size class: macrofossils

Primary reference: R. C. Frey. 1988. Paleoecology of Treptoceras duseri (Michelinoceratida, Proteoceratidae) from Late Ordovician of southwestern Ohio. New Mexico Bureau of Mines and Mineral Resources Memoir 44:79-101 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27500: authorized by Steven Holland, entered by Tori Hanson on 07.12.2002, edited by Pete Wagner and Torsten Liebrecht

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Calymenidae
Flexicalymene meeki1 Foerste 1910 trilobite
 Asaphida - Asaphidae
Isotelus maximus1 Locke 1838 trilobite
 Myalinida - Ambonychiidae
 Cardiidia - Grammysiidae
Cuneamya miamiensis1 Hall and Whitfield 1875 clam
 Modiomorphida - Modiomorphidae
Cymatonota semistriata1 Ulrich 1893 clam
Psiloconcha grandis1 Ulrich 1894 clam
 Bellerophontida - Sinuitidae
"Sinuites subcompressus" = Sinuites subcompressa1
"Sinuites subcompressus" = Sinuites subcompressa1 Ulrich and Scofield 1897 snail
 Orthocerida - Proteoceratidae
Treptoceras cincinnatiensis2 Miller 1875
MU 424T to 426T, 17186 (suite of 4 specimens)
Treptoceras duseri Hall and Whitfield 1875
Treptoceras fosteri2 Miller 1875
MU 418T, 17178 (suite of 6 specimens)
 Trepostomata - Atactotoechidae
 Labechiida - Stromatoceriidae
 Ichnofossils -
Chondrites sp.1 von Sternberg 1833