Where: Colorado (38.9° N, 105.3° W: paleocoordinates 40.4° N, 97.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Florissant Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified shale

Size class: macrofossils

• Both specimens preserve feathers

Preservation: mold/impression, soft parts

Collected by S. H. Scudder in 1877; reposited in the MCZ

Collection methods: surface (in situ), mechanical,

Primary reference: J. A. Allen. 1878. Description of a fossil passerine bird from the insect-bearing shales of Colorado. Bulletin of the United States Geological and Geographical Survey of the Territories 4:443-445 [D. Ksepka/D. Ksepka]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 112320: authorized by Daniel Ksepka, entered by Daniel Ksepka on 09.07.2011

Creative Commons license: CC BY (attribution)