Baldy Butte SW-Blazing Saddle (Cretaceous of the United States)

Also known as UCMP V-74116

Where: Garfield County, Montana (47.6° N, 107.1° W: paleocoordinates 54.4° N, 80.3° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Hell Creek Formation (Montana Group), Lancian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; silty sandstone

Size classes: macrofossils, mesofossils

Reposited in the UCMP

Collection methods: bulk, surface (float), sieve,

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14508: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Matthew Carrano and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gnathostomata
  -
Osteichthyes indet.3
Amphibia
 Salientia -
Anura indet.3
 Caudata - Urodela
Lisserpeton sp.3, Scapherpeton tectum3
Lisserpeton sp.3 Estes 1965 salamander
atlantes
Scapherpeton tectum3 Cope 1876 salamander
 Proteida - Batrachosauroididae
Opisthotriton sp.3
Opisthotriton sp.3 Auffenberg 1961 salamander
Reptilia
 Ornithischia -
Ceratopsia indet.3
Ceratopsia indet.3 ceratopsian
 Ornithischia - Ceratopsidae
Ceratopsidae indet.3
Ceratopsidae indet.3 Marsh 1888 ceratopsid
 Ornithischia - Hadrosauridae
Hadrosauridae indet.3
Hadrosauridae indet.3 Cope 1869 hadrosaurid
 Theropoda -
Theropoda indet.3, Theropoda indet.2
Theropoda indet.2 theropod
 Theropoda - Troodontidae
cf. Pectinodon sp.4
cf. Pectinodon sp.4 Carpenter 1982 maniraptoran
UCMP 128845
 Theropoda - Dromaeosauridae
Richardoestesia sp.3
Richardoestesia sp.3 Currie et al. 1990 maniraptoran
 Theropoda - Coeluridae
"Coelurosauridae indet." = Coeluridae3
"Coelurosauridae indet." = Coeluridae3 Marsh 1881 coelurid
 Loricata -
Crocodylia indet.3, Crocodylia indet.1
Crocodylia indet.3 crocodilian
Crocodylia indet.1 crocodilian
 Crocodylia - Alligatoridae
Brachychampsa sp.3
Brachychampsa sp.3 Gilmore 1911 crocodilian
 Crocodylia - Crocodylidae
Crocodylidae indet.3
 Choristodera -
Champsosaurus sp.3
Champsosaurus sp.3 Cope 1876 choristodere
 Squamata -
Squamata indet.3
Squamata indet.3 squamates
 Squamata - Chamopsiidae
Chamops segnis3, Leptochamops denticulatus3, Peneteius aquilonius3
Chamops segnis3 Marsh 1892 squamates
Leptochamops denticulatus3 Gilmore 1928 squamates
Peneteius aquilonius3 Estes 1969 squamates
 Squamata -
Obamadon gracilis n. gen. n. sp.5
Obamadon gracilis n. gen. n. sp.5 Longrich et al. 2012 squamates
Holotype UCMP 128873, dentary
 Squamata - Xenosauridae
Exostinus sp.3
Exostinus sp.3 Cope 1873 squamates
 Squamata - Anguidae
Anguidae indet.3, Odaxosaurus piger3
Anguidae indet.3 Gray 1825 squamates
Odaxosaurus piger3 Gilmore 1928 squamates
 Testudines -
Testudines indet.3, Cryptodira indet.3
Testudines indet.3 Batsch 1788 turtle
Cryptodira indet.3 Cope 1868 turtle
 Testudines - Pantrionychidae
Helopanoplia distincta3
Helopanoplia distincta3 Hay 1908 turtle
 Testudines - Kinosternidae
"? Kinosternidae indet." = Kinosternoidea3
"? Kinosternidae indet." = Kinosternoidea3 Hay 1892 mud turtle
 Testudines - Trionychidae
Trionychidae indet.3
Trionychidae indet.3 Gray 1825 softshell turtle
 Testudines - Adocidae
Adocus sp.3
Adocus sp.3 Cope 1868 turtle
 Testudines - Chelydridae
? Chelydridae indet.3
? Chelydridae indet.3 Swainson 1839 turtle
 Testudines - Nanhsiungchelyidae
Basilemys sp.3
Basilemys sp.3 Hay 1902 turtle
 Testudinata -
Compsemys victa3
Compsemys victa3 Leidy 1856 turtle
 Testudinata - Baenidae
Baenidae indet.3
Baenidae indet.3 Cope 1882 turtle
Mammalia
  -
Mammalia indet.3
Mammalia indet.3 Linnaeus 1758 mammal
 Allotheria -
Multituberculata indet.3
Multituberculata indet.3 Cope 1884 multituberculate
 Multituberculata - Cimolomyidae
Essonodon browni3
Essonodon browni3 Simpson 1927 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma thompsoni, Mesodma cf. formosa, Mesodma hensleighi3
Mesodma thompsoni Clemens 1964 multituberculate
Mesodma cf. formosa Marsh 1889 multituberculate
Mesodma hensleighi3 Lillegraven 1969 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus
Cimolodon nitidus Marsh 1889 multituberculate
 Theriamorpha - Gypsonictopidae
Gypsonictops sp.
Gypsonictops sp. Simpson 1927 eutherian
 Theriamorpha - Pediomyidae
"Pediomys florencae" = Protolambda florencae, "Pediomys krejcii" = Leptalestes krejcii
"Pediomys florencae" = Protolambda florencae Clemens 1966 metatherian
"Pediomys krejcii" = Leptalestes krejcii Clemens 1966 metatherian
 Theriamorpha - Alphadontidae
Alphadon sp.3
Alphadon sp.3 Simpson 1927 metatherian
 Polydolopimorphia - Glasbiidae
Glasbius twitchelli
Glasbius twitchelli Archibald 1982 metatherian
Osteichthyes
 Acipenseriformes - Acipenseridae
Acipenser sp.3
Acipenser sp.3 Linnaeus 1758 sturgeon
Actinopteri
 Esociformes - Esocidae
Estesesox foxi6
Estesesox foxi6 Wilson et al. 1992
 Amiiformes - Amiidae
Amiidae indet.3, Amia sp.3, Melvius thomasi3
Amiidae indet.3 Huxley 1861 bowfin
Amia sp.3 Linnaeus 1766 bowfin
Melvius thomasi3 Bryant 1987 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet.3, Lepisosteus sp.3
Lepisosteidae indet.3 Cuvier 1825 gar
Lepisosteus sp.3 Agassiz 1843 gar
Chondrichthyes
 Rajiformes - Rhinobatidae
Myledaphus bipartitus3
Myledaphus bipartitus3 Cope 1876 guitarfish
 Hybodontiformes - Lonchidiidae
Lonchidion selachos3
Lonchidion selachos3 Estes 1964 elasmobranch
1Alroy 2007; 2Carrano 2025; 3Database 2005; 4Larson and Currie 2013; 5Longrich et al. 2012; 6Wilson et al. 1992