Strophomena - Lepidocyclus community, Dillsboro Fm. (Ordovician of the United States)

Where: Hamilton County, Ohio (39.2° N, 84.5° W: paleocoordinates 25.8° S, 58.2° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Dillsboro Formation, Richmondian (449.5 - 443.7 Ma)

• "Cincinnatian (lower Richmondian)"

• formation-level stratigraphic resolution

Environment/lithology: sand shoal; limestone and shale

• "bioclastic ls and sh. offshore shoal?? BA3 definite"

Size class: macrofossils

Primary reference: R. P. MacDaniel. 1976. Upper Ordovician Sedimentary and Benthic Community patterns of the Cincinnati Arch area. 1-181 [M. Uhen/J. Ju/M. Uhen]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 354: authorized by Jack Sepkoski, entered by Mike Sommers on 23.03.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "MacDaniel 1976"
Trilobita
 Phacopida - Calymenidae
Flexicalymene sp. Shirley 1936 trilobite
 Asaphida - Asaphidae
Isotelus sp. Dekay 1824 trilobite
Strophomenata
 Strophomenida - Sowerbyellidae
"Thaerodonta clarksvillensis" = Eochonetes clarksvillensis
"Thaerodonta clarksvillensis" = Eochonetes clarksvillensis Foerste 1912
 Strophomenida - Rafinesquinidae
Rafinesquina sp. Hall and Clarke 1892
 Strophomenida - Strophomenidae
Strophomena sp. Rafinesque and De Blainville 1824
Rhynchonellata
 Atrypida - Anazygidae
Zygospira sp. Hall 1862
 Rhynchonellida - Rhynchotrematidae
"Lepidocyclus capax" = Hiscobeccus capax
"Lepidocyclus capax" = Hiscobeccus capax Conrad 1842
 Orthida - Glyptorthidae
 Orthida - Plaesiomyidae
"Plaesiomys subquadrata" = Plaesiomys subquadratus
"Plaesiomys subquadrata" = Plaesiomys subquadratus Hall 1847
 Orthida - Platystrophiidae
 Orthida - Plectorthidae
Hebertella sp. Hall and Clarke 1892
Bivalvia
 Cyrtodontida - Cyrtodontidae
Cyrtodontula sp. Tomlin 1931 clam
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
 Modiomorphida - Modiomorphidae
Modiolopsis sp. Hall 1847 clam
Stenolaemata
 Trepostomata -
? Trepostomata indet. Ulrich 1882
small and large ramose bryozoans - originally entered as "? Trepostomata indet."
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Anthozoa
 Heliolitida - Coccoserididae
Protaraea richmondensis Foerste 1909 tabulate coral
originally entered as "Protarea richmondensis"
 Stauriida - Streptelasmatidae
"Streptelasma rusticum" = Helicelasma rusticum
"Streptelasma rusticum" = Helicelasma rusticum Billings 1858 horn coral