Dry Fork Coulee: Lancian, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Stagodontidae
Didelphodon vorax Marsh 1889
1 specimen
Mammalia - Multituberculata - Cimolomyidae
Meniscoessus robustus (Marsh 1889)
2 specimens
Reptilia
Compsemys victa (Leidy 1856)
Database 2005 18 specimens
Reptilia - Testudines
Testudines indet. Batsch 1788
Database 2005 4 specimens
Helopanoplia distincta Hay 1908
Database 2005 3 specimens
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
Database 2005 4 specimens
Reptilia - Testudines - Adocidae
Adocus sp. Cope 1868
Database 2005 4 specimens
Reptilia - Crocodylia
Leidyosuchus sp. Lambe 1907
Database 2005 4 specimens
    = Crocodylia indet. Owen 1842
Alroy 2007
Reptilia
Brachychampsa sp. Gilmore 1911
Database 2005 15 specimens
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
Database 2005 27 specimens
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
Database 2005 1 specimen
Reptilia - Theropoda
Megalosauridae indet. (Fitzinger 1843)
Database 2005 1 specimen
    = Theropoda indet. Marsh 1881
Carrano 2025
Theropoda indet. Marsh 1881
Database 2005 2 specimens
Reptilia - Dromaeosauridae
Richardoestesia cf. isosceles Sankey 2001
Sankey 2008 1 specimen
UCMP 186842
Reptilia - Sauria
Sauria indet. MacCartney 1802
Database 2005 1 specimen
Amphibia - Temnospondyli - Urodela
Urodela indet. (Duméril 1805)
Database 2005 6 specimens
Scapherpeton tectum Cope 1876
Database 2005 1 specimen
Actinopteri - Amiiformes - Amiidae
Melvius thomasi Bryant 1987
Database 2005 2 specimens
Amia sp. Linnaeus 1766
Database 2005 6 elements
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843
Database 2005 20 elements
see common names

Geography
Country:United States State/province:Montana County:Garfield
Coordinates: 47.5° North, 107.0° West (view map)
Paleocoordinates:54.3° North, 80.1° West
Basis of coordinate:unpublished field data
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
*Epoch:Senonian
Key time interval:Lancian
Age range of interval:72.10000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Hell Creek
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology: sandstone
Secondary lithology: mudstone
Includes fossils?Y
Includes fossils?Y
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Disassociated major elements:some
Disassociated minor elements:some
Collection methods and comments
Collection methods:surface (float),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:UCMP
Metadata
Also known as:UCMP V-73103
Database number:14525
Authorizer:J. Alroy, M. Carrano Enterer:J. Alroy, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:1994-04-30 00:00:00 Last modified:2009-06-19 17:13:49
Access level:the public Released:1994-04-30 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
960. J. D. Archibald. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. University of California Publications in Geological Sciences 122:1-286 [J. Alroy/J. Alroy/M. Carrano]

Secondary references:

19636 J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy]
14199ETE M. T. Carrano. 2025. Taxonomic opinions on the Dinosauria. [M. Carrano/M. Carrano/M. Carrano]
13103 U.C.M.P. Database. 2005. UCMP collections database. University of California Museum of Paleontology [M. Carrano/M. Carrano/M. Carrano]
34479ETE J. T. Sankey. 2008. Diversity of latest Cretaceous (late Maastrichtian) small theropods and birds: teeth from the Lance and Hell Creek formations, USA. In J. T. Sankey & S. Baszio (ed.), Vertebrate Microfossil Assemblages: Their Role in Paleoecology and Paleobiogeography. Indiana University Press, Bloomington 117-134 [M. Carrano/M. Carrano]