Where: Sheridan County, Wyoming (44.4° N, 106.9° W: paleocoordinates 10.1° S, 66.3° W)
• coordinate based on unpublished field data
• outcrop-level geographic resolution
When: Horseshoe Mountain Member (Bighorn Dolomite Formation), Richmondian (449.6 - 445.5 Ma)
• "The red fossiliferous beds, 5 to 8 feet thick, are near the top of the eastward-dipping Bighorn Formation, separated from the overlying Devonian rocks to the east by about 10 feet of conodont-bearing Upper Ordovician limestone."
• formation-level stratigraphic resolution
Environment/lithology: deep subtidal; lithified, red, argillaceous limestone
Size class: macrofossils
Reposited in the FMNH
• also used collections from Miami University, Oxford, Ohio
Primary reference: R. W. Macomber. 1970. Articulate Brachiopods from the Upper Bighorn Formation (Late Ordovician) of Wyoming. Journal of Paleontology 44(3):416-450 [S. Holland/T. Hanson/T. Hanson]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 65239: authorized by Steven Holland, entered by Steven Holland on 20.09.2006, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Anthozoa | |
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Pteraspidomorpha | |
Astraspis desiderata2 Walcott 1892 | |
Eriptychius americanus2 Walcott 1892 | |
Rhynchonellata | |
Diceromyonia storeya Okulitch 1943 | |
Platystrophia equiconvexa, "Platystrophia prayi" = Gnamptorhynchos prayi
"Platystrophia prayi" = Gnamptorhynchos prayi Howe 1966 | |
Dinorthis occidentalis Okulitch 1943
Plaesiomys aff. rockymontana Wilson 1926 | |
Hesperorthis cf. pyramidalis Twenhofel 1928 | |
"Zygospira aequivalvis" = Anazyga aequivalvis
"Zygospira aequivalvis" = Anazyga aequivalvis Twenhofel 1928 | |
Rhynchotrema iowense Wang 1949
"Lepidocyclus gigas" = Hiscobeccus gigas Wang 1949
Hypsiptycha anticostiensis Billings 1862 | |
Strophomenata | |
"Strophomena planocorrugata" = Rugomena planocorrugata, "Strophomena fluctuosa" = Nasutimena fluctuosa
"Strophomena planocorrugata" = Rugomena planocorrugata Twenhofel 1928
"Strophomena fluctuosa" = Nasutimena fluctuosa Billings 1860 | |
Oepikina cf. pergibbosa Foerste 1917
Megamyonia nitens Billings 1860 | |
Eochonetes maearum n. sp.1
Eochonetes maearum n. sp.1 Bauer and Stigall 2016 | |
Stenolaemata | |
Batostoma sp.2 Ulrich 1882 | |
Sceptropora cf. facula2 Ulrich 1888 |