Where: Fergus County, Montana (47.7° N, 109.6° W: paleocoordinates 54.8° N, 75.9° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Judith River Formation (Montana Group), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
Size classes: macrofossils, mesofossils
Collected by F. v. Hayden in the 1850s; reposited in the ANSP, USGS
Collection methods: surface (float),
Primary reference: J. Leidy. 1856. Notices of remains of extinct reptiles and fishes, discovered by Dr. F. V. Hayden in the bad lands of the Judith River, Nebraska Territory. Proceedings of the Academy of Natural Sciences of Philadelphia 8:72-73 [M. Carrano/M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 69213: authorized by Matthew Carrano, entered by Matthew Carrano on 21.02.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Trionyx foveatus n. sp.
Trionyx foveatus n. sp. Leidy 1856 softshell turtle | |
Deinodon horridus n. gen. n. sp.
Deinodon horridus n. gen. n. sp. Leidy 1856 coelurosaur | |
Troodon formosus n. gen. n. sp.
Troodon formosus n. gen. n. sp. Leidy 1856 maniraptoran | |
Palaeoscincus costatus n. gen. n. sp.
Palaeoscincus costatus n. gen. n. sp. Leidy 1856 ankylosaur | |
Trachodon mirabilis n. gen. n. sp.
| |
Crocodilus humilis Leidy 1856 crocodilian | |
Actinopteri | |
Lepidotus occidentalis n. sp.
Lepidotus occidentalis n. sp. Leidy 1856 gar | |
"Lepidotus haydeni n. sp." = Lepisosteus occidentalis
"Lepidotus haydeni n. sp." = Lepisosteus occidentalis Leidy 1856 gar |