Ranchester western fauna, Amsden Fm., Teton Range (Carboniferous of the United States)

Where: Wyoming (43.8° N, 110.9° W: paleocoordinates 2.2° N, 40.4° W)

• coordinate based on political unit

When: Ranchester Limestone Member (Amsden Formation), Chesterian (339.4 - 318.1 Ma)

• "Upper Miss. (latest Chester)"

Environment/lithology: shallow subtidal; cherty/siliceous dolomite

• "cherty dolomite and limestone. offshore shallow marine; quiet, somewhat restricted, marine salinity"

Size class: macrofossils

Primary reference: W. J. Sando, M. Gordon, Jr., and J. T. Dutro. 1975. Stratigraphy and geologic history of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming. United States Geological Survey Professional Paper 848A:1-83 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 585: authorized by Arnold Miller, entered by Mike Sommers on 19.01.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Sando et al. 1975"
 Foraminiferida -
"Foraminiferida indet." = Foraminifera
"Foraminiferida indet." = Foraminifera d'Orbigny 1826 foram
many species reported but not compiled here
Rhynchonellata
 Athyridida - Athyrididae
Composita sp. Brown 1849
 Spiriferida - Spiriferidae
Bivalvia
 Cardiida - Kalenteridae
Permophorus sp. Chavan 1954 clam
Gastropoda
 Euomphalina - Euomphalidae
Straparollus sp. de Montfort 1810 snail
 Bellerophontida -
""Bellerophontoidea" indet." = Bellerophontoidea
""Bellerophontoidea" indet." = Bellerophontoidea M'Coy 1851 snail