Millersburg Mbr., Lexington Limestone, Kentucky (Ordovician of the United States)

Where: Kentucky (38.0° N, 84.7° W: paleocoordinates 27.3° S, 63.2° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Millersburg Member (Lexington Limestone Formation), Chatfieldian (453.8 - 451.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, shelly/skeletal, gray packstone and lithified, shelly/skeletal shale

• environmental call based on field notes of Holland and Patzkowsky

Size class: macrofossils

Preservation: original calcite

Reposited in the USNM

Primary reference: E. R. Cressman. 1973. Lithostratigraphy and depositional environments of the Lexington Limestone (Ordovician) of central Kentucky. USGS Professional Paper 768:1-61 [M. Patzkowsky/M. Patzkowsky/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 34559: authorized by Steven Holland, entered by Steven Holland on 09.09.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Stenolaemata
 Cystoporata - Constellariidae
Constellaria sp., Constellaria cf. teres, Constellaria cf. florida
Constellaria sp. Dana 1846
 Cystoporata - Ceramoporidae
? Ceramophylla sp.
 Cryptostomata - Escharoporidae
Escharopora sp., Escharopora cf. nodulosa, Graptodictya sp.
Escharopora sp. Hall 1847
Graptodictya sp. Ulrich 1882
 Trepostomata - Heterotrypidae
Heterotrypa sp.
Heterotrypa sp. Nicholson 1879
 Trepostomata - Halloporidae
Hallopora onealli, Hallopora cf. onealli
 Trepostomata - Aisenvergiidae
? Eridotrypa sp.
? Eridotrypa sp. Ulrich 1893
 Trepostomida - Monticuliporidae
Peronopora sp., Mesotrypa sp., Homotrypa sp., Atactoporella sp.
Peronopora sp. Nicholson 1881
Mesotrypa sp. Ulrich 1893
Homotrypa sp. Ulrich 1882
Atactoporella sp. Ulrich 1883
Rhynchonellata
 Atrypida - Anazygidae
Zygospira sp.
Zygospira sp. Hall 1862
 Orthida - Platystrophiidae
Platystrophia sp., Platystrophia colbiensis
 Orthida - Plectorthidae
"Hebertella parkensis" = Hebertella parksensis
"Hebertella parkensis" = Hebertella parksensis Foerste 1909
 Rhynchonellida - Orthorhynchulidae
Orthorhynchula linneyi
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina sp., Rafinesquina winchesterensis
Rafinesquina sp. Hall and Clarke 1892
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp., Allonychia flanaganensis
Ambonychia sp. Hall 1847 clam
Allonychia flanaganensis Foerste 1914 clam
 Nuculida - Cardiolariidae
Deceptrix perminuta
 Nuculida - Praenuculidae
Palaeoconcha obliqua
Gastropoda
  -
cf. Microceras sp.
cf. Microceras sp. Hall 1845 snail
 Euomphalina - Platyceratidae
Cyclonema sp.
Cyclonema sp. Hall 1852 snail
 Murchisoniina - Lophospiridae
cf. Loxoplocus sp.
cf. Loxoplocus sp. Fischer 1885 snail
Loxoplocus (Lophospira)
Ostracoda
 Beyrichicopida - Bolliidae
Warthinia nodosa
 Hollinocopida - Tetradellidae
Ceratopsis sp., Ceratopsis intemedia
Ceratopsis sp. Ulrich 1894 ostracod
Trilobita
 Proetida - Tropidocoryphidae
"? Proetidella sp." = Decoroproetus
"? Proetidella sp." = Decoroproetus Pribyl 1946 trilobite