Yellowstone River, half a mile below mouth of Elk Creek (Eocene of the United States)

Where: Wyoming (44.0° N, 110.0° W: paleocoordinates 46.8° N, 98.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sepulcher Formation, Middle Eocene (48.6 - 37.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Preservation: mold/impression, adpression, original carbon

Collection methods: surface (in situ),

Primary reference: F. H. Knowlton. 1899. Fossil Flora of the Yellowstone National Park. USGS Monograph Series 32(2) [H. Sims/H. Lindon/H. Lindon]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24087: authorized by Hallie Sims, entered by Heather Lindon on 30.07.2002, edited by Jason Cassara

Creative Commons license: CC BY (attribution)

Taxonomic list

Carpolithes
  -
Carpolithes osseus Lesquereux 1873
Lesquereux. A very doubtful species, of which the type is lost and the species not since obtained.
Carpites
  -
Carpites pedunculatus Knowlton 1899
Knowlton
Mciveraephyllum nebrascense
  -
"Cornus newberryi" = Mciveraephyllum nebrascense
"Cornus newberryi" = Mciveraephyllum nebrascense Schimper 1874
Hollick
Polypodiopsida
 Polypodiales - Polypodiidae
Asplenium magnum Knowlton 1899
Knowlton
Asplenium iddingsi Knowlton 1899
Knowlton
Asplenium remotidens Knowlton 1899
Knowlton
 Schizaeales - Polypodiidae
Lygodium kaulfussi Heer climbing fern
Heer (Cherry Creek, Oregon, Rare)
 Equisetales - Equisetidae
Equisetum canaliculatum Knowlton 1899 horsetail
Knowlton
Equisetum deciduum Knowlton 1899 horsetail
Knowlton
Angiospermae
 Sapindales - Sapindaceae
Sapindus wardii Knowlton 1899 soapnut
Knowlton
Sapindus grandifoliolus Ward 1885 soapnut
Ward, Also on the Thunderer
"? Sapindus alatus" = Sapindus glendivensis Knowlton 1919 soapnut
Ward
 Malvales - Tiliaceae
Tilia populifolia Lesquereux 1883 linden
Lesquereux
 Malpighiales - Salicaceae
Populus daphnogenoides Ward 1885 poplar
Ward
Populus glandulifera Heer 1856 poplar
Heer
Populus speciosa Ward 1885 poplar
Ward
Populus xantholithensis Knowlton 1899 poplar
Knowlton
 Oxalidales - Oxalidaceae
"Sapindus affinis" = Averrhoites affinis
"Sapindus affinis" = Averrhoites affinis Newberry 1868 wood sorrel
Newby
 Fagales - Fagaceae
Fagus antipofii Abich 1858 beech
Abich. Identified by Lesquereux but not since observed
Quercus sp. Linnaeus 1753 oak
Knowlton. This is a fragment of the base of what appears to have been a large, thick leaf.
Quercus hesperia Knowlton 1899 oak
Knowlton
Quercus olafseni Heer 1868 oak
Heer
Quercus ? consimilis Newberry 1883 oak
Newby. This is only a fragment of the base of a leaf. It does not agree absolutely with the figures of lesquereux, but rather than make it a new species, I have referred it provisionally as above
? Quercus magnifolia Knowlton 1899 oak
Knowlton
Quercus culveri Knowlton 1899 oak
Knowlton
Castanea pulchella Knowlton 1899 chestnut
Knowlton
 Fagales - Myricaceae
Myrica scottii Lesquereux 1883 bayberry
Lesquereux
 Fagales - Betulaceae
Betula iddingsi Knowlton 1899 birch
Knowlton
 Fagales - Juglandaceae
Hicoria culveri Knowlton 1899
Knowlton
 Rosales - Rhamnaceae
Zizyphus serrulatus Ward 1885 buckthorn
Ward
 Rosales - Ulmaceae
Ulmus sp. Linnaeus 1753 elm
fruits
Ulmus ? rhamnifolia Ward 1885 elm
Ward
 Celastrales - Celastraceae
Celastrus culveri Knowlton 1899 bittersweet
Knowlton
Celastrus ellipticus Knowlton 1899 bittersweet
Knowlton
Celastrus inaequalis Knowlton 1899 bittersweet
Knowlton
 Rosids - Moraceae
Ficus sp. Linnaeus 1753 fig
Knowlton
Ficus asiminaefolia Lesquereux 1883 fig
Lesquereux
Ficus densifolia Knowlton 1899 fig
Knowlton
Ficus deformata Knowlton 1899 fig
Knowlton
? Artocarpus quercoides Knowlton 1899 mulberry
Knowlton
Dicotyledoneae
 Ericales - Ericaceae
Arctostaphylos elliptica Knowlton 1899 heather
Knowlton
 Ericales - Ebenaceae
Diospyros haguei Knowlton 1899
Knowlton
Angiospermae
 Magnoliales - Magnoliaceae
? Magnolia pollardi Knowlton 1899 magnolia
Knowlton
 Lamiales - Oleaceae
Fraxinus wrightii Knowlton 1899 ash
Knowlton
 Apiales - Araliaceae
Aralia serrulata Knowlton 1899 spikenard
Knowlton
Aralia notata Lesquereux 1878 spikenard
Lesquereux
 Proteales - Platanaceae
? Credneria pachyphylla Knowlton 1899
Knowlton
 Poales - Cyperaceae
Cyperacites giganteus Knowlton 1899 sedge
Knowlton
Cyperacites angustior Schimper 1870 sedge
Al. Br. (Miocene; Elk Creek; Lx.) This species was identifed by lesquereux, but the material can not now be found
 Laurales - Lauraceae
Laurus ? primigenia Unger 1850 laurel
Ung.
Laurus princeps Heer 1856 laurel
Heer
Laurus montana Knowlton 1899 laurel
Knowlton
Malapoenna lamarensis Knowlton 1899 laurel
Knowlton
 Typhales - Commelinidae
Sparganium stygium Heer 1855 bur-reed
Heer
 Coniferales - Cupressaceae
Sequoia langsdorfii Heer 1877 coast redwood
(Brgt.) Heer