High Bridge, Tyrone Fm. (Ordovician of the United States)

Where: Jessamine County, Kentucky (37.8° N, 84.7° W: paleocoordinates 27.4° S, 63.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Tyrone Limestone Formation (High Bridge Group), Rocklandian (457.3 - 449.6 Ma)

• Tyrone Limestone

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; limestone

• nothing is said about the lithology of the Tyrone Ls. at this locality

Size class: macrofossils

Preservation: recrystallized, replaced with silica

Reposited in the USNM

Primary reference: R. C. Frey. 1995. Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio. U.S. Geological Survey Professional Paper 1066P:1-126 [S. Holland/S. Holland]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87739: authorized by Björn Kröger, entered by Torsten Liebrecht on 23.03.2009, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Euomphalina - Helicotomidae
Helicotoma planulatoides n. sp.2
Helicotoma planulatoides n. sp.2 Ulrich and Scofield 1897 snail
 Murchisoniina - Trochonematidae
"? Lophospira notablis" = Trochonemella notablis2
"? Lophospira notablis" = Trochonemella notablis2 Ulrich and Scofield 1897 snail
 Murchisoniina - Subulitidae
Subulites parvus n. sp.2, Cyrtospira bicurvata n. sp.2
Subulites parvus n. sp.2 Ulrich and Scofield 1897 snail
Cyrtospira bicurvata n. sp.2 Ulrich and Scofield 1897 snail
Cephalopoda
 Endocerida - Endoceratidae
Vaginoceras "sp. A"
Vaginoceras "sp. A" Hyatt 1884
MU 29868 (single silicified siphuncle)
 Orthocerida - Proteoceratidae
"Orthoceras tyronensis n. sp." = Proteoceras tyronensis
"Orthoceras tyronensis n. sp." = Proteoceras tyronensis Foerste 1912
USNM 87109 (type)
 Actinocerida - Ormoceratidae
Ormoceras ferecentricum n. sp.
Ormoceras ferecentricum n. sp. Foerste and Teichert 1930
USNM 82214 (type)
 Actinocerida - Actinoceratidae
Actinoceras kentuckiense n. sp., Actinoceras altopontense n. sp.
Actinoceras kentuckiense n. sp. Foerste and Teichert 1930
USNM 82237 (type)
Actinoceras altopontense n. sp. Foerste and Teichert 1930
USNM 82196 (type)
Rostroconchia
 Conocardiida - Eopteriidae
Eopteria conocardiformis1
Eopteria conocardiformis1 Pojeta and Runnegar 1976
USNM 209333; pl. 26 f. 16
1Pojeta and Runnegar 1976; 2Ulrich and Scofield 1897