Where: Plymouth County, Iowa (42.8° N, 96.5° W: paleocoordinates 42.9° N, 96.1° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Early/Lower Pleistocene (2.6 - 0.8 Ma)
• "twenty feet below the surface... Lower Pleistocene, Aftonian"
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Collection methods: quarrying,
Primary reference: H. F. Osborn. 1924. Additional generic and specific stages in the evolution of the Proboscidea. American Museum Novitates 154:1-5 [J. Alroy/J. Alroy/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 93136: authorized by John Alroy, entered by John Alroy on 05.01.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
Stegomastodon aftoniae n. sp.
Stegomastodon aftoniae n. sp. Osborn 1924 gomphothere originally figured by Calvin (date) as Mastodon mirificus and described by Hay (1924) as Rhabdobunus mirificus
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