Altman Blowout (Cretaceous of the United States)

Also known as UCMP V-5616

Where: Niobrara County, Wyoming (43.2° N, 104.5° W: paleocoordinates 49.6° N, 79.4° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Lance Formation, Lancian (70.6 - 66.0 Ma)

• from a single blowout

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

• none given

Size class: mesofossils

Reposited in the UCMP

Collection methods: anthill,

• "almost all from anthills"

Primary reference: A. E. Wood and J. B. S. Ormsbee. 1954. Notes on mammals from the Upper Cretaceous Lance Formation of Wyoming. Journal of Paleontology 28(1):26-31 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14505: authorized by John Alroy, entered by John Alroy on 26.07.1994, edited by Matthew Carrano and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

• "? aff. Microcosmodon sp." is probably a dinosaur fragment: Clemens 1964a

•"Delphodon sp.": status unclear, apparently not discussed by Clemens 1966

Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus7 Cope 1876 whiptail stingray
Gnathostomata
  -
Actinopteri
 Teleostei - Aspidorhynchidae
 Elopiformes - Elopidae
Elopidae indet.6 Bonaparte 1846
 Amiiformes - Amiidae
Amia fragosa6 Jordan 1927 bowfin
Amia uintaensis6 Leidy 1873 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis6 Leidy 1856 gar
Osteichthyes
 Proteida - Batrachosauroididae
Prodesmodon copei6 Estes 1964 tetrapod
Opisthotriton kayi6 Auffenberg 1961 tetrapod
 Salientia -
 Caudata - Urodela
Habrosaurus dilatus6 Gilmore 1928 siren
Scapherpeton tectum6 Cope 1876 salamander
Lisserpeton bairdi8 Estes 1965 salamander
Reptilia
  -
Reptilia indet.6 Laurenti 1768 reptile
 Testudines - Trionychidae
Trionychidae indet.6 Gray 1825 softshell turtle
Trionychidae sp.9 Gray 1825 softshell turtle
Voucher: UCMP 73027
"Aspiderites sp." = Aspideretes9 Hay 1904 softshell turtle
Voucher: UCMP 173369
Trionychinae indet.2 softshell turtle
 Testudines - Compsemydidae
Compsemys sp.9 Leidy 1856 turtle
Voucher: UCMP 72895
Compsemys victa6 Leidy 1856 turtle
 Testudines - Baenidae
Baenidae sp.9 turtle
Voucher: UCMP 72935
Stygiochelys sp.6 Gaffney and Hiatt 1971 turtle
cf. Stygiochelys sp.9 Gaffney and Hiatt 1971 turtle
Voucher: UCMP 72904
 Testudines -
Cryptodira indet.6 Cope 1868 turtle
? Cryptodira indet.6 Cope 1868 turtle
 Testudines - Nanhsiungchelyidae
Basilemys sp.9 Hay 1902 turtle
Voucher: UCMP 72902
Basilemys sinuosa6 Riggs 1906 turtle
 Testudines - Panchelydridae
Chelydridae sp.9 turtle
Voucher: UCMP 72907
 Testudines - Panemydidae
? Emydinae indet.6 Rafinesque 1815 turtle
 Sauria -
Sauria indet.6 diapsid
 Archosauria -
 Saurischia -
Saurischia indet.6 saurischian
 Theropoda -
 Avetheropoda -
? Coelurosauria indet.6 Huene 1914 coelurosaur
 Avetheropoda - Dromaeosauridae
Dromaeosauridae indet.6 Colbert and Russell 1969 coelurosaur
Richardoestesia sp.6 Currie et al. 1990 coelurosaur
 Avetheropoda - Troodontidae
Pectinodon bakkeri10 Carpenter 1982 coelurosaur
UCMP 186886, 214059
 Avetheropoda -
cf. Paronychodon lacustris11 Cope 1876 coelurosaur
Aublysodon mirandus6 Leidy 1868 coelurosaur
 Neornithischia -
Ceratopsia indet.6 ornithischian
 Neornithischia - Ceratopsidae
Triceratops sp.6 Marsh 1889 ceratopsid
 Neornithischia - Hadrosauridae
"Anatosaurus sp." = Edmontosaurus6
"Anatosaurus sp." = Edmontosaurus6 Lambe 1917 hadrosaurine
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii6
"Leidyosuchus sternbergi" = Borealosuchus sternbergii6 Gilmore 1910 crocodilian
 Crocodylia - Crocodylidae
Crocodylidae indet.6 Cuvier 1807 crocodile
 Crocodylia - Alligatoridae
Brachychampsa montana6 Gilmore 1911 crocodilian
 Squamata - Anguidae
Odaxosaurus piger6 Gilmore 1928 lizard
 Squamata - Boidae
Boidae indet.6 Gray 1825 boa
 Squamata - Chamopsiidae
Chamops segnis6 Marsh 1892 lizard
Meniscognathus altmani6 Estes 1964 lizard
 Choristodera -
Champsosaurus sp.6 Cope 1876 choristodere
Mammalia
 Cimolesta - Cimolestidae
Cimolestes incisus5 Marsh 1889 eutherian
Cimolestes stirtoni5 Clemens 1973 eutherian
 Leptictida - Gypsonictopidae
Gypsonictops hypoconus Simpson 1927 eutherian
confirmed by Clemens 1973
Gypsonictops hypoconus5 Simpson 1927 eutherian
 Theriiformes - Peradectidae
Pediomys elegans4, "Pediomys hatcheri" = Aletridelphys hatcheri4, "Pediomys florencae" = Aletridelphys florencae4, "Pediomys cooki" = Leptalestes cooki4
Pediomys elegans4 Marsh 1889 metatherian
this or any of the following three records may include "P. sp."
"Pediomys hatcheri" = Aletridelphys hatcheri4 Osborn 1898 metatherian
"Pediomys florencae" = Aletridelphys florencae4 Clemens 1966 metatherian
"Pediomys cooki" = Leptalestes cooki4 Clemens 1966 metatherian
 Didelphimorphia - Stagodontidae
Didelphodon vorax1 Marsh 1889 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus robustus Marsh 1889 multituberculate
confirmed by Clemens 1964a
Cimolomys gracilis Marsh 1889 multituberculate
confirmed by Clemens 1964a
 Multituberculata - Neoplagiaulacidae
Mesodma sp.3 Jepsen 1940 multituberculate
Mesodma thompsoni3 Clemens 1964 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus3 Marsh 1889 multituberculate