Madison (Ordovician of the United States)

Also known as Ulrich & Scofield Locality, Madison

Where: Jefferson County, Indiana (38.7° N, 85.4° W: paleocoordinates 25.8° S, 59.6° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Saluda Formation, Richmondian (449.6 - 445.5 Ma)

Environment/lithology: shallow subtidal; calcareous dolomite and argillaceous limestone

• Hatfield (1968) concluded that the Saluda was deposited in a broad, shallow lagoon enclosed by broad, low banks of corals.
• Mainly calcitic dolomite that in many places exhibits laminations, mud cracks, and small ripple marks. Ostracodes are the only common fossils. Beds of more bioclastic limestone or shales are present locally.

Size class: macrofossils

Reposited in the OSU, USNM

Primary reference: E. O. Ulrich and W. H. Scofield. 1897. The Lower Silurian Gastropoda of Minnesota. The Paleontology of Minnesota 39(2):813-1081 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 155711: authorized by Pete Wagner, entered by Pete Wagner on 25.04.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

• "MacDaniel, 1976"
Show authors, comments, and common names
Gastropoda
 Bellerophontida - Temnodiscidae
"Oxydiscus magnus" = Alaskadiscus magnus
"Oxydiscus magnus" = Alaskadiscus magnus Miller 1878 snail
 Bellerophontida - Bellerophontidae
"Bellerophon mohri" = Sphenosphaera mohri
"Bellerophon mohri" = Sphenosphaera mohri Miller 1874 snail
 Murchisoniina - Trochonematidae
Trochonema madisonense
Trochonema madisonense Ulrich and Scofield 1897 snail
 Murchisoniina - Lophospiridae
"Lophospira tropidophora" = Paupospira tropidophora, "Schizolopha moorei" = Paupospira moorei, "Lophospira bowdeni" = Paupospira bowdeni
"Lophospira tropidophora" = Paupospira tropidophora Meek 1873 snail
"Schizolopha moorei" = Paupospira moorei Ulrich and Scofield 1897 snail
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail