Baldy Butte SW-Blazing Saddle: Lancian, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes
Osteichthyes indet. Huxley 1880
Database 2005 2 elements
Acipenseriformes - Acipenseridae
Acipenser sp. Linnaeus 1758
Database 2005 1 element
Actinopteri - Esociformes - Esocidae
Estesesox foxi Wilson et al. 1992
Wilson et al. 1992 4 elements
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825
Database 2005 9 elements
Lepisosteus sp. Agassiz 1843
Database 2005 162 elements
Actinopteri - Amiiformes - Amiidae
Amiidae indet. Huxley 1861
Database 2005 1 element
Amia sp. Linnaeus 1766
Database 2005 71 elements
Melvius thomasi Bryant 1987
Database 2005 39 elements
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
Database 2005 1 specimen
Amphibia - Temnospondyli - Batrachosauroididae
Opisthotriton sp. Auffenberg 1961
Database 2005 7 specimens
Amphibia - Temnospondyli - Urodela
Lisserpeton sp. Estes 1965
Database 2005 1 specimen
atlantes
Scapherpeton tectum Cope 1876
Database 2005 3 specimens
Reptilia - Squamata
Squamata indet. Oppel 1811
Database 2005 3 specimens
Reptilia - Xenosauridae
Exostinus sp. Cope 1873
Database 2005 1 specimen
Reptilia - Anguidae
Anguidae indet. Gray 1825
Database 2005 17 specimens
Odaxosaurus piger (Gilmore 1928)
Database 2005 1 specimen
Reptilia
Obamadon gracilis n. gen., n. sp. Longrich et al. 2012
Longrich et al. 2012 1 specimen
Holotype UCMP 128873, dentary
Reptilia - Chamopsiidae
Chamops segnis Marsh 1892
Database 2005 1 specimen
Leptochamops denticulatus (Gilmore 1928)
Database 2005 1 specimen
Peneteius aquilonius Estes 1969
Database 2005 1 specimen
Reptilia - Testudines
Testudines indet. Batsch 1788
Database 2005 3 specimens
Cryptodira indet. Cope 1868
Database 2005 1 specimen
Helopanoplia distincta Hay 1908
Database 2005 1 specimen
Reptilia - Testudines - Nanhsiungchelyidae
Basilemys sp. Hay 1902
Database 2005 1 specimen
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
Database 2005 13 specimens
Reptilia - Testudines
? Kinosternidae indet. (Hay 1892)
Database 2005 1 specimen
spelled with current rank as Kinosternoidea
Reptilia - Testudines - Adocidae
Adocus sp. Cope 1868
Database 2005 20 specimens
Reptilia - Testudines - Chelydridae
? Chelydridae indet. Swainson 1839
Database 2005 1 specimen
Reptilia - Baenidae
Baenidae indet. Cope 1882
Database 2005 1 specimen
Reptilia
Compsemys victa (Leidy 1856)
Database 2005 2 specimens
Reptilia - Crocodylia
Leidyosuchus sp. Lambe 1907
Database 2005 23 specimens
    = Crocodylia indet. Owen 1842
Alroy 2007
Crocodylia indet. (Owen 1842)
Database 2005 3 specimens
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
Database 2005 12 specimens
Reptilia
Brachychampsa sp. Gilmore 1911
Database 2005 53 specimens
Reptilia - Theropoda
Theropoda indet. Marsh 1881
Database 2005 5 specimens
Megalosauridae indet. (Fitzinger 1843)
Database 2005 2 specimens
    = Theropoda indet. Marsh 1881
Carrano 2025
Reptilia - Dromaeosauridae
Richardoestesia sp. Currie et al. 1990
Database 2005 1 specimen
Reptilia - Troodontidae
Troodon sp. Leidy 1856
Sankey 2008 1 specimen
UCMP 128845
    = cf. Pectinodon sp. Carpenter 1982
Larson and Currie 2013
Reptilia - Coeluridae
Coelurosauridae indet. Cope 1882
Database 2005 3 specimens
synonym of Coeluridae
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
Database 2005 1 specimen
Reptilia
Ceratopsia indet. Marsh 1890
Database 2005 11 specimens
Reptilia - Ceratopsidae
Ceratopsidae indet. Marsh 1888
Database 2005 18 specimens
Reptilia
Champsosaurus sp. Cope 1876
Database 2005 2 specimens
Mammalia
Mammalia indet. Linnaeus 1758
Database 2005 2 specimens
Mammalia - Alphadontidae
Alphadon sp. Simpson 1927
Database 2005 1 specimen
Mammalia - Pediomyidae
Pediomys florencae Clemens 1966
1 specimen
recombined as Protolambda florencae
Pediomys krejcii Clemens 1966
2 specimens
recombined as Leptalestes krejcii
Mammalia - Glasbiidae
Glasbius twitchelli Archibald 1982
1 specimen
Mammalia - Gypsonictopidae
Gypsonictops sp. Simpson 1927
1 specimen
Mammalia - Multituberculata
Multituberculata indet. Cope 1884
Database 2005 1 specimen
Mammalia - Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889
4 specimens
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma cf. formosa (Marsh 1889)
1 specimen
Mesodma hensleighi Lillegraven 1969
Database 2005 2 specimens
Mesodma thompsoni Clemens 1964
1 specimen
(1 measurement)
Mammalia - Multituberculata - Cimolomyidae
Essonodon browni Simpson 1927
Database 2005 1 specimen
Chondrichthyes - Rajiformes - Rhinobatidae
Myledaphus bipartitus Cope 1876
Database 2005 26 elements
Chondrichthyes - Hybodontiformes - Lonchidiidae
Lonchidion selachos Estes 1964
Database 2005 7 elements
see common names

Geography
Country:United States State/province:Montana County:Garfield
Coordinates: 47.6° North, 107.1° West (view map)
Paleocoordinates:54.4° North, 80.3° 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
Geological group:Montana Formation:Hell Creek
Local section:Baldy Local bed:2
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: silty sandstone
Includes fossils?Y
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:bulk,surface (float),sieve,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:UCMP
Metadata
Also known as:UCMP V-74116
Database number:14508
Authorizer:J. Alroy, M. Carrano, R. Benson Enterer:J. Alroy, M. Carrano, R. Benson
Modifier:M. Carrano Research group:vertebrate
Created:1994-04-30 00:00:00 Last modified:2021-05-05 11:12:57
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]
48570 D. W. Larson and P. J. Currie. 2013. Multivariate analyses of small theropod dinosaur teeth and implications for paleoecological turnover through time. PLoS ONE 8(1):e54329:1-14 [M. Carrano/M. Carrano/M. Carrano]
43992 N. R. Longrich, B.-A. S. Bhullar, and J. A. Gauthier. 2012. Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary. Proceedings of the National Academy of Sciences 109(52):21396-21401 [R. Benson/R. Benson/T. Liebrecht]
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]
45321 M. V. H. Wilson, D. B. Brinkman, and A. G. Neuman. 1992. Cretaceous Esocoidei (Teleostei): early radiation of the pikes in North American fresh waters. Journal of Paleontology 66(5):839-846 [M. Bell/M. Bell]