Where: Phillips County, Montana (47.5° N, 107.9° W: paleocoordinates 54.2° N, 74.1° W)

• coordinate based on political unit

When: Judith River Formation (Montana Group), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: microfossils

Preservation: original sporopollenin

Collection methods: bulk, sieve,

Primary reference: J. W. Hall. 1968. A new genus of Salviniaceae and a new species of Azolla from the late Cretaceous. American Fern Journal 58(2):77-88 [R. Lupia/R. Lupia/R. Lupia]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32404: authorized by Rick Lupia, entered by Rick Lupia on 28.06.2003

Creative Commons license: CC BY (attribution)