Florissant locality 3, U of California Loc. 3732 CENSUS (Eocene to of the United States)

Also known as University of California Locality 3732

Where: Colorado (38.9° N, 105.3° W: paleocoordinates 40.1° N, 97.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Florissant Formation, Late/Upper Eocene to Late/Upper Eocene (37.2 - 28.4 Ma)

• From MacGinitie: Fossils are found in unit 3, about 50 feet of lake shales and associated volcanic sediments. The best and most abundant plant and insect fossils are found in this member, in paper shales at or near its base.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; fine-grained, gypsiferous, tuffaceous shale and siltstone

• Lake was situated close to volcanic source; a probable source is the Guffey volcano, 15 miles southwest of Florissant.
• From MacGinitie: Frequent alternations of fine-grained paper shales and bedded tuffs showing a considerable variety of color, texture, and thickness of strata. The best and most abundant plant and insect fossils are found in paper shales. From Manchester: fossils are preserved in laminated tuffaceous sediments...sediment ranges from siltstone to conglomeratic, but best preserved leaf and fuit remains have been found in the siltstone layers.

Size class: macrofossils

Preservation: mold/impression, original carbon

Reposited in the UCMP

Collection methods: bulk,

• Out of the 1339 specimens listed, 69 are described as 'uncertain affinity'. They are not reported in the occurrence list.

Primary reference: H. D. MacGinitie. 1953. Fossil Plants of the Florissant Beds of Colorado. Carnegie Inst. of Washington, Contributions to Paleontology Publ. 599:1-198 [C. Labandeira/C. Labandeira/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39849: authorized by Peter Wilf, entered by Jocelyn Sessa on 09.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Polypodiopsida
 Polypodiales - Polypodiidae
Angiospermae
 Alismatales - Potamogetonaceae
? Potamogeton sp. Linnaeus 1753 pondweed
 Sapindales - Anacardiaceae
Cotinus fraterna Lesquereux 1883 cashew
Schmaltzia vexans Lesquereux 1883 cashew
 Sapindales - Sapindaceae
Sapindus coloradensis Cockerell 1908 soapnut
Athyana haydenii soapberry
Koelreuteria alleni golden rain tree
Koelreuteria sp. Laxmann 1772 golden rain tree
Koelreuteria capsule
Acer florissanti Kirchner 1898 maple
 Sapindales - Meliaceae
 Sapindales - Burseraceae
 Crossosomatales - Staphyleaceae
Staphylea acuminata Lesquereux 1873 bladdernut
 Rosales - Ulmaceae
Cedrelospermum sp. Saporta 1889 elm
Ulmus tenuinervis Lesquereux 1873 elm
 Rosales - Pomaceae
 Rosales -
 Rosales - Rosaceae
Cercocarpus sp. Humboldt et al. 1823 rose
Cercocarpus fruit
 Rosales - Rhamnaceae
 Fabales - Fabaceae
? Fabaceae indet. Lindley 1836 legume
Legume ? seed
Cercis parvifolia Lesquereux 1883 redbud
 Fagales - Fagaceae
Fagopsis sp. Hollick 1909
Fagopsis cone
Fagopsis sp. Hollick 1909
Fagopsis seed
Fagopsis longifolia Lesquereux 1872
 Fagales - Juglandaceae
Carya sp. Nuttall 1818 hickory
Carya fruit
 Malpighiales - Salicaceae
Populus crassa Lesquereux 1883 poplar
Salix ramaleyi Cockerell 1906 willow
 Proteales - Proteaceae
Lomatia sp. Brown 1810
Lomatia seed
 Lamiales - Oleaceae
Osmanthus praemissa Lesquereux 1883
 Ranunculales - Berberidaceae
 Poales - Typhaceae
Typha lesquereuxi Cockerell 1908 bulrush
Dicotyledoneae
 Myrtales - Myrtaceae
 Coniferales - Cupressaceae
Chamaecyparis sp. Spach 1841 cypress
Chamaecyparis cone
Sequoia sp. Endlicher 1847 coast redwood
Sequoia cone
Sequoia affinis Lesquereux 1876 coast redwood
Pinopsida
 Pinales - Pinaceae
Pinus sp. Linnaeus 1753 pine
Pinus seed
Pinus florissanti Lesquereux 1883 pine
Pinus hambachi Kirchner 1898 pine
Hexactinellida
 Lychniscosa - Camerospongiidae
Robinia lesquereuxi glass sponge