Judith River badlands (USGS): Middle Campanian - Late/Upper Campanian, Montana
collected by F. v. Hayden 1850

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Actinopteri - Lepisosteiformes
Lepidotus occidentalis n. sp. Leidy 1856
4 elements
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepidotus haydeni n. sp. Leidy 1856
1 element
synonym of Lepidotus occidentalis
Reptilia - Testudines - Trionychidae
Trionyx foveatus n. sp. Leidy 1856
3 specimens
Reptilia - Avetheropoda - Troodontidae
Troodon formosus n. gen., n. sp. Leidy 1856
1 specimen
Reptilia - Avetheropoda
Deinodon horridus n. gen., n. sp. Leidy 1856
10 specimens
nomen dubium belonging to Tyrannosauroidea
Palaeoscincus costatus n. gen., n. sp. Leidy 1856
5 specimens
nomen dubium belonging to Ankylosauria
Reptilia - Hadrosauridae
Trachodon mirabilis n. gen., n. sp. Leidy 1856
5 specimens
nomen dubium belonging to Hadrosauridae
ANSP 9260
Crocodilus humilis Leidy 1856
5 specimens
nomen dubium belonging to Crocodylomorpha
see common names

Country:United States State/province:Montana County:Fergus
Coordinates: 47.7° North, 109.6° West (view map)
Paleocoordinates:54.8° North, 75.9° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Campanian 10 m.y. bin:Cretaceous 7
Key time interval:Middle Campanian - Late/Upper Campanian
Age range of interval:83.50000 - 70.60000 m.y. ago
Geological group:Montana Formation:Judith River
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:variable
Associated major elements:some
Disassociated major elements:many
Disassociated minor elements:many
Collection methods and comments
Collection methods:surface (float),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:ANSP,USGS
Collectors:F. v. Hayden Collection dates:1850s
Database number:69213
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2007-02-21 14:17:53 Last modified:2017-08-02 10:33:00
Access level:the public Released:2007-02-21 14:17:53
Creative Commons license:CC BY
Reference information

Primary reference:

13002.ETE 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]

Secondary references:

62949 E. Hennig. 1915. In F. Frech (ed.), Fossilium Catalogus. I: Animalia. Pars 9: Stegosauria 1-16 [M. Carrano/M. Carrano]
19954ETE J. Leidy. 1860. Extinct vertebrates from the Judith River and Great Lignite Formations of Nebraska. Transactions of the American Philosophical Society 11:139-154 [M. Carrano/M. Carrano]
12319ETE R. S. Lull and N. E. Wright. 1942. Hadrosaurian dinosaurs of North America. Geological Society of America Special Paper 40:1-242 [M. Carrano/M. Carrano/M. Carrano]