USGS 5101-CO. Kentucky Route 169 west of Hickman Creek (Ordovician of the United States)

Where: Jessamine County, Kentucky (37.9° N, 84.5° W: paleocoordinates 27.5° S, 63.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Curdsville Limestone Member (Lexington Limestone Formation), Turinian (460.9 - 449.5 Ma)

Environment/lithology: shallow subtidal; lithified, shelly/skeletal limestone

• "marine transgression, with higher energy, shallow-water deposits grading upward into lower energy deposits."
• "The lower 10-ft-thick unit is light-colored bioclastic limestone that consists of calcirudites, and crossbedded and ripple-marked calcarenites. The lower unit is composed of well-sorted, abraded skeletal debris having about 5 to 10 percent quartz sand."

Size class: macrofossils

Primary reference: G.P. Wahlman. 1992. Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. United States Geological Survey Professional Paper 1066(O):1-123 [P. Wagner/P. Wagner/E. Ito]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 100128: authorized by Pete Wagner, entered by Hallie Street on 30.11.2010, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

 Strophomenida - Sowerbyellidae
Sowerbyella curdsvillensis3 Foerste 1912
six specimens
 Strophomenida - Rafinesquinidae
Rafinesquina sp.2 Hall and Clarke 1892
one specimen
 Atrypida - Anazygidae
Zygospira sp.2 Hall 1862
10 specimens
 Rhynchonellida - Rhynchotrematidae
Rhynchotrema increbescens3 Hall 1847
25 specimens
 Orthida - Plaesiomyidae
Dinorthis pectinella2 Emmons 1842
two specimens
 Orthida - Hesperorthidae
Hesperorthis sp.2 Schuchert and Cooper 1931
six specimens
 Orthida - Platystrophiidae
Platystrophia sp.2 King 1850
two specimens
 Cyrtodontida - Cyrtodontidae
Vanuxemia gibbosa2 clam
51 valves
Cyrtodonta subovata2 clam
seven valves
 Unioni - Lyrodesmatidae
Lyrodesma cf. acuminatum2 clam
one valve.
 Bellerophontida - Pterothecidae
"Carinaropsis acuta" = Carinaropsis minima
"Carinaropsis acuta" = Carinaropsis minima Ulrich and Scofield 1897 snail
 Neoloricata - Lepidopleuridae
Helminthochiton blacki2 chiton
two intermediate valves.
Stenaster cf. obtusus1 Forbes 1848 brittle star
 Hybocrinida - Hybocystitidae
Hybocystites problematicus4 Wetherby 1880 Sea lily
 Lichenariida - Lyoporidae
? Nyctopora sp.2 Nicholson 1879 tabulate coral