Where: McCone County, Montana (47.9° N, 106.2° W: paleocoordinates 54.6° N, 78.4° W)
• coordinate based on political unit
When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)
Environment/lithology:
Size class: microfossils
Preservation: original sporopollenin
Collection methods: bulk, sieve,
• Little information given about processing other than "By using the simple seiving and sorting techniques customarily used for isolating megaspores from sediments,..."
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 32403: authorized by Rick Lupia, entered by Rick Lupia on 28.06.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
Azolla circinata n. sp.
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