Where: Sheridan County, Wyoming (44.7° N, 107.7° W: paleocoordinates 9.4° S, 66.4° W)
• coordinate based on unpublished field data
• outcrop-level geographic resolution
When: Horseshoe Mountain Member (Bighorn Dolomite Formation), Richmondian (449.5 - 443.7 Ma)
• member-level stratigraphic resolution
Environment/lithology: deep subtidal; lithified, argillaceous limestone
Size class: macrofossils
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 13497: authorized by Steven Holland, entered by Tori Hanson on 05.04.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Strophomenata | |
Eochonetes maearum Bauer and Stigall 2016 | |
Oepikina cf. pergibbosa Foerste 1917
Megamyonia nitens Billings 1860 | |
"Strophomena planocorrugata" = Rugomena planocorrugata, "Strophomena fluctuosa" = Nasutimena fluctuosa
"Strophomena planocorrugata" = Rugomena planocorrugata Twenhofel 1928
"Strophomena fluctuosa" = Nasutimena fluctuosa Billings 1860 | |
Rhynchonellata | |
Hypsiptycha anticostiensis, Hypsiptycha cf. neenah, Rhynchotrema iowense, "Lepidocyclus gigas" = Hiscobeccus gigas
Hypsiptycha anticostiensis Billings 1862
Hypsiptycha cf. neenah Whitfield 1882
Rhynchotrema iowense Wang 1949
"Lepidocyclus gigas" = Hiscobeccus gigas Wang 1949 | |
Plaesiomys aff. rockymontana Wilson 1926
Dinorthis (Dinorthis) occidentalis Okulitch 1943 | |
Hesperorthis cf. pyramidalis Twenhofel 1928 | |
Platystrophia equiconvexa, "Platystrophia prayi" = Gnamptorhynchos prayi
"Platystrophia prayi" = Gnamptorhynchos prayi Howe 1966 | |
Diceromyonia storeya Okulitch 1943 | |
"Zygospira aequivalvis" = Anazyga aequivalvis
"Zygospira aequivalvis" = Anazyga aequivalvis Twenhofel 1928 |