Beartooth Butte, Shoshone National Forest (Devonian to of the United States)

Also known as Shoshonia-type locality

Where: Park County County, Wyoming (44.0° N, 109.0° W: paleocoordinates 22.4° S, 47.1° W)

When: Jefferson Formation, Givetian to Givetian (387.7 - 372.2 Ma)

• formation-level stratigraphic resolution

Environment/lithology: fluvial; lithology not reported

Size class: macrofossils

Preservation: mold/impression

Collection methods: surface (float), chemical

• Shoshonia was collected from talus, but the surrounding matrix contains large concretions of crystalline calcite that indicate that the fossil derives from the lower 14m of the Jefferson Formation (Dorf 1934)

Primary reference: M. Friedman, M. I. Coates, and P. Anderson. 2007. First discovery of a primitive coelacanth fin fills a major gap in the evolution of lobed fins and limbs. Evolution & Development 9(4):329-337 [G. Lloyd/G. Lloyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 209780: authorized by Graeme Lloyd, entered by Graeme Lloyd on 15.05.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exposures of the Jefferson Formation at Beartooth Butte have been considered unfossiliferous (Dorf 1934), but renewed collecting in these beds have also yielded the fragmentary jaw of a tetrapodomorph sarcopterygian in addition to Shoshonia.
Show authors, comments, and common names
Coelacanthimorpha
  -
Shoshonia arctopteryx n. gen. n. sp.
Shoshonia arctopteryx n. gen. n. sp. Friedman et al. 2007 lobe-finned fish
FMNH PF 15327