Ulrich & Scofield Danville (Lower Beds) (Ordovician of the United States)

Where: Boyle County, Kentucky (37.6° N, 84.8° W: paleocoordinates 27.5° S, 63.5° W)

• local area-level geographic resolution

When: Amorphognathus superbus conodont zone, Brannon Member (Lexington Formation), Shermanian (460.9 - 449.5 Ma)

• Given as lower Flanagan Cherts, which are a mix of cherty beds. The lower ones in the Danville section belong to the Brannon Member according to McLaughlin et al. 2004.


• group of beds-level stratigraphic resolution

Environment/lithology: cherty/siliceous limestone and shale

• tabular interbedded calcisiltites and shales (rhythmite facies; Fig. 4F) - McLaughlin et al. 2004.

Size class: macrofossils

Preservation: replaced with silica

Collected by Sardeson & Ulrich in 1890; reposited in the 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 154460: authorized by Pete Wagner, entered by Pete Wagner on 20.02.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trochonematoidea - Lophospiridae
"Lophospira medialis" = Lophospira milleri, "Lophospira pulchella" = Lophospira perangulata
"Lophospira medialis" = Lophospira milleri Miller 1877 snail
"Lophospira pulchella" = Lophospira perangulata Hall 1847 snail
 Bellerophontida - Sinuitidae
"Protowarthia obesus" = Sinuites obesa
"Protowarthia obesus" = Sinuites obesa Ulrich and Scofield 1897 snail
 Bellerophontida - Bellerophontidae
"Bellerophon troosti" = Sphenosphaera troosti
"Bellerophon troosti" = Sphenosphaera troosti de Ferrusac and d'Orbigny 1840 snail
 Bellerophontida - Bucaniidae
"Bucania micronema n. sp." = Loxobucania lindsleyi
"Bucania micronema n. sp." = Loxobucania lindsleyi Safford 1869 snail
 Bellerophontida - Tropidodiscidae
"Oxydiscus subacutus" = Alaskadiscus subacutus
"Oxydiscus subacutus" = Alaskadiscus subacutus Ulrich and Scofield 1897 snail
 Murchisoniina - Eotomariidae
"? Liospira mundula n. sp." = Paraliospira mundula, Liospira micula
"? Liospira mundula n. sp." = Paraliospira mundula Ulrich and Scofield 1897 snail
Liospira micula Hall and Whitney 1862 snail
 Murchisoniina - Murchisoniidae
"Hormotoma salteri" = Cyrtostropha salteri
"Hormotoma salteri" = Cyrtostropha salteri Ulrich and Scofield 1897 snail
 Cyrtonellida - Cyrtolitidae
Cyrtolites retrorsus Ulrich and Scofield 1897