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• coordinate based on unpublished field data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, 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

Chondrichthyes
 Hybodontiformes - Lonchidiidae
Lonchidion selachos3 Estes 1964 elasmobranch
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus3 Cope 1876 whiptail stingray
Gnathostomata
  -
Actinopteri
 Acipenseriformes - Acipenseridae
Acipenser sp.3 Linnaeus 1758 sturgeon
 Acanthomorphata - Sciaenidae
Platacodon nanus3 Marsh 1889
 Amiiformes - Amiidae
Amiidae indet.3 Huxley 1861 bowfin
Melvius thomasi3 Bryant 1987 bowfin
Amia sp.3 Linnaeus 1766 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet.3 Cuvier 1825 gar
Lepisosteus sp.3 Agassiz 1843 gar
Osteichthyes
 Salientia -
 Proteida - Batrachosauroididae
Opisthotriton sp.3 Auffenberg 1961 salamander
 Caudata - Urodela
Scapherpeton tectum3 Cope 1876 salamander
Reptilia
 Testudines -
Testudines indet.3 Batsch 1788 turtle
 Testudines - Trionychidae
Trionychidae indet.3 Gray 1825 softshell turtle
 Testudines -
Compsemys victa3 Leidy 1856 turtle
 Testudines - Baenidae
Baenidae indet.3 Cope 1882 turtle
 Testudines -
Cryptodira indet.3 Cope 1868 turtle
 Testudines - Kinosternidae
"? Kinosternidae indet." = Kinosternoidea3
"? Kinosternidae indet." = Kinosternoidea3 Hay 1892 mud turtle
 Testudines - Nanhsiungchelyidae
Basilemys sp.3 Hay 1902 turtle
 Testudines - Adocidae
Adocus sp.3 Cope 1868 turtle
 Testudines - Pantrionychidae
Helopanoplia distincta3 Hay 1908 turtle
 Testudines - Panchelydridae
 Theropoda -
Theropoda indet.2 theropod
 Avetheropoda - Dromaeosauridae
Richardoestesia sp.3 Currie et al. 1990 coelurosaur
 Avetheropoda - Troodontidae
cf. Pectinodon sp.4 Carpenter 1982 coelurosaur
UCMP 128845
 Avetheropoda - Coeluridae
"Coelurosauridae indet." = Coeluridae3
"Coelurosauridae indet." = Coeluridae3 Marsh 1881 coelurid
 Neornithischia -
Ceratopsia indet.3 ornithischian
 Neornithischia - Ceratopsidae
Ceratopsidae indet.3 Marsh 1888 ceratopsid
 Neornithischia - Hadrosauridae
Hadrosauridae indet.3 Cope 1869 hadrosaurid
 Loricata -
Crocodylia indet.3 crocodilian
Crocodylia indet.1 crocodilian
 Crocodylia - Crocodylidae
Crocodylidae indet.3 Cuvier 1807 crocodile
 Crocodylia - Alligatoridae
Brachychampsa sp.3 Gilmore 1911 crocodilian
 Squamata -
Squamata indet.3 Oppel 1811 squamates
 Squamata - Xenosauridae
Exostinus sp.3 Cope 1873 squamates
 Squamata - Anguidae
Anguidae indet.3 Gray 1825 squamates
Odaxosaurus piger3 Gilmore 1928 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 - Chamopsiidae
Leptochamops denticulatus3 Gilmore 1928 lizard
Chamops segnis3 Marsh 1892 lizard
Peneteius aquilonius3 Estes 1969 lizard
 Choristodera -
Champsosaurus sp.3 Cope 1876 choristodere
Mammalia
  -
Mammalia indet.3 Linnaeus 1758 mammal
 Leptictida - Gypsonictopidae
Gypsonictops sp. Simpson 1927 eutherian
 Theriiformes - Peradectidae
"Pediomys florencae" = Aletridelphys florencae, "Pediomys krejcii" = Leptalestes krejcii
"Pediomys florencae" = Aletridelphys florencae Clemens 1966 metatherian
"Pediomys krejcii" = Leptalestes krejcii Clemens 1966 metatherian
 Didelphimorphia - Alphadontidae
Alphadon sp.3 Simpson 1927 marsupial
 Didelphimorphia - Glasbiidae
Glasbius twitchelli Archibald 1982 marsupial
 Allotheria -
Multituberculata indet.3 Cope 1884 multituberculate
 Multituberculata - Cimolomyidae
Essonodon browni3 Simpson 1927 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma hensleighi3 Lillegraven 1969 multituberculate
Mesodma thompsoni Clemens 1964 multituberculate
Mesodma cf. formosa Marsh 1889 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate