Where: Shannon County, South Dakota (43.9° N, 102.6° W: paleocoordinates 45.2° N, 93.7° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Chadron Formation, Chadronian (37.2 - 33.9 Ma)
• member-level stratigraphic resolution
Environment/lithology: fluvial-lacustrine; siliciclastic sediments
Size class: macrofossils
Collected by T. C. Brown, F. B. Loomis in 1903
• Amherst College collection
Primary reference: R. S. Lull. 1905. Megacerops tyleri, a new species of titanothere from the Bad Lands of South Dakota. Journal of Geology 13(5):443-456 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 16900: authorized by John Alroy, entered by John Alroy on 15.05.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
| Reptilia | |
"Chrysemys inornata n. sp." = Echmatemys lativertebralis
"Chrysemys inornata n. sp." = Echmatemys lativertebralis Cope 1877 turtle "at the head of Bear Creek in Spring Draw Basin" underneath a "titanotherium skeleton" (possibly the Brontops specimen)
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| Mammalia | |
"Megacerops tyleri n. sp." = Brontops tyleri
"Megacerops tyleri n. sp." = Brontops tyleri Lull 1905 brontothere from "head of Bear Creek ... 35 feet above the base" of a 200 ft Chadron section; see Mader 1989
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