USNM 41341 CENSUS (Eocene of the United States)

Also known as PW 9527

Where: Sweetwater County, Wyoming (41.8° N, 108.0° W: paleocoordinates 46.6° N, 91.8° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Ramsey Ranch Member (Wasatch Formation), Wasatchian (55.8 - 50.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; lithified, carbonaceous shale

Size class: macrofossils

Preservation: adpression

Reposited in the USNM

Collection methods: bulk, mechanical,

• only dicot leaves censused; see corresponding non-census locality for full species list and additional comments

Primary reference: P. Wilf. 2000. Late Paleocene-early Eocene climate changes in southwestern Wyoming: Paleobotanical analysis. Geological Society America Bulletin 112(2):292-307 [P. Wilf/P. Wilf/P. Wilf]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 28910: authorized by Peter Wilf, entered by Peter Wilf on 28.02.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Angiospermae
 Laurales - Lauraceae
Lauraceae "RR46" Jussieu 1789 laurel
Morphotype #RR46; see Wilf 2000 (reference 7696) for additional information
 Rosales - Ulmaceae
Chaetoptelea microphylla Newberry 1868 elm
Morphotype #RR50; see Wilf 2000 (reference 7696) for additional information
 Oxalidales - Elaeocarpaceae
aff. Sloanea "RR18" Linnaeus
Morphotype #RR18; see Wilf 2000 (reference 7696) for additional information
 Fagales - Juglandaceae
Platycarya americana Hickey 1977
Morphotype #RR01; see Wilf 2000 (reference 7696) for additional information
 Malpighiales - Salicaceae
Populus wyomingiana poplar
Morphotype #RR62; see Wilf 2000 (reference 7696) for additional information
 Malpighiales - Euphorbiaceae
Stillingia casca Hickey 1977 spurge
Morphotype #RR47; see Wilf 2000 (reference 7696) for additional information
  -
"Dicotyledonae "RR48"" = Dicotyledoneae, "Dicotyledonae "RR40"" = Dicotyledoneae, "Dicotyledonae "RR67"" = Dicotyledoneae
"Dicotyledonae "RR48"" = Dicotyledoneae
Morphotype #RR48; Dicot XXXVI of Wing, 1998; see Wilf 2000 (reference 7696) for additional information
"Dicotyledonae "RR40"" = Dicotyledoneae
Morphotype #RR40; see Wilf 2000 (reference 7696) for additional information
"Dicotyledonae "RR67"" = Dicotyledoneae
Morphotype #RR67; see Wilf 2000 (reference 7696) for additional information
Cinnamomophyllum
  -
Cinnamomophyllum "RR19" Kraeusel and Weyland 1950
Morphotype #RR19; see Wilf 2000 (reference 7696) for additional information