PBDB Collection

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• coordinate based on unpublished field data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

Show authors, comments, and common names

Gnathostomata
-	? Osteichthyes indet.⁶ ? Osteichthyes indet.⁶ bony fish
Amphibia
Salientia -	Anura indet.⁶ Anura indet.⁶ frog
Caudata - Urodela	Habrosaurus dilatus⁶, Lisserpeton bairdi⁸, Scapherpeton tectum⁶ Habrosaurus dilatus⁶ Gilmore 1928 siren Lisserpeton bairdi⁸ Estes 1965 salamander Scapherpeton tectum⁶ Cope 1876 salamander
Proteida - Batrachosauroididae	Opisthotriton kayi⁶, Prodesmodon copei⁶ Opisthotriton kayi⁶ Auffenberg 1961 salamander Prodesmodon copei⁶ Estes 1964 salamander
Reptilia
-	Reptilia indet.⁶ Reptilia indet.⁶ Laurenti 1768 reptile
Archosauria -	Archosauria indet.⁶ Archosauria indet.⁶ archosaur
Ornithischia -	Ceratopsia indet.⁶ Ceratopsia indet.⁶ ceratopsian
Ornithischia - Ceratopsidae	Triceratops sp.⁶ Triceratops sp.⁶ Marsh 1889 ceratopsid
Ornithischia - Hadrosauridae	"Anatosaurus sp." = Edmontosaurus⁶ "Anatosaurus sp." = Edmontosaurus⁶ Lambe 1917 hadrosaurine
Theropoda -	Theropoda indet.⁶, ? Coelurosauria indet.⁶, cf. Paronychodon lacustris¹¹ Theropoda indet.⁶ theropod ? Coelurosauria indet.⁶ coelurosaur cf. Paronychodon lacustris¹¹ Cope 1876 maniraptoran
Theropoda - Troodontidae	Pectinodon bakkeri¹⁰ Pectinodon bakkeri¹⁰ Carpenter 1982 maniraptoran UCMP 186886, 214059
Theropoda - Dromaeosauridae	Dromaeosauridae indet.⁶, Richardoestesia sp.⁶ Dromaeosauridae indet.⁶ Colbert and Russell 1969 maniraptoran Richardoestesia sp.⁶ Currie et al. 1990 maniraptoran
Theropoda - Tyrannosauridae	Aublysodon mirandus⁶ Aublysodon mirandus⁶ Leidy 1868 tyrannosaurid
Saurischia -	Saurischia indet.⁶ Saurischia indet.⁶ saurischian
Crocodylia - Alligatoridae	Brachychampsa montana⁶ Brachychampsa montana⁶ Gilmore 1911 crocodilian
Crocodylia - Crocodylidae	Crocodylidae indet.⁶ Crocodylidae indet.⁶ crocodile
Loricata -	"Leidyosuchus sternbergi" = Borealosuchus sternbergii⁶ "Leidyosuchus sternbergi" = Borealosuchus sternbergii⁶ Gilmore 1910 crocodilian
Choristodera -	Champsosaurus sp.⁶ Champsosaurus sp.⁶ Cope 1876 choristodere
Sauria -	Sauria indet.⁶ Sauria indet.⁶ diapsid
Squamata - Boidae	Boidae indet.⁶ Boidae indet.⁶ Gray 1825 boa
Squamata - Chamopsiidae	Chamops segnis⁶, Meniscognathus altmani⁶ Chamops segnis⁶ Marsh 1892 squamates Meniscognathus altmani⁶ Estes 1964 squamates
Squamata - Anguidae	Odaxosaurus piger⁶ Odaxosaurus piger⁶ Gilmore 1928 squamates
Testudines -	Cryptodira indet.⁶, ? Cryptodira indet.⁶ Cryptodira indet.⁶ Cope 1868 turtle ? Cryptodira indet.⁶ Cope 1868 turtle
Testudines - Emydidae	? Emydinae indet.⁶ ? Emydinae indet.⁶ Rafinesque 1815 turtle
Testudines - Trionychidae	Trionychidae indet.⁶, Trionychidae sp.⁹, Trionychinae indet.², "Aspiderites sp." = Aspideretes⁹ Trionychidae indet.⁶ Gray 1825 softshell turtle Trionychidae sp.⁹ Gray 1825 softshell turtle Voucher: UCMP 73027 Trionychinae indet.² Gray 1825 softshell turtle "Aspiderites sp." = Aspideretes⁹ Hay 1904 softshell turtle Voucher: UCMP 173369
Testudines - Chelydridae	Chelydridae indet.⁶, Chelydridae sp.⁹ Chelydridae indet.⁶ Swainson 1839 turtle Chelydridae sp.⁹ Swainson 1839 turtle Voucher: UCMP 72907
Testudines - Nanhsiungchelyidae	Basilemys sp.⁹, Basilemys sinuosa⁶ Basilemys sp.⁹ Hay 1902 turtle Voucher: UCMP 72902 Basilemys sinuosa⁶ Riggs 1906 turtle
Testudinata -	Compsemys sp.⁹, Compsemys victa⁶ Compsemys sp.⁹ Leidy 1856 turtle Voucher: UCMP 72895 Compsemys victa⁶ Leidy 1856 turtle
Testudinata - Baenidae	Baenidae indet.⁶, Baenidae sp.⁹, Stygiochelys sp.⁶, cf. Stygiochelys sp.⁹ Baenidae indet.⁶ Cope 1882 turtle Baenidae sp.⁹ Cope 1882 turtle Voucher: UCMP 72935 Stygiochelys sp.⁶ Gaffney and Hiatt 1971 turtle cf. Stygiochelys sp.⁹ Gaffney and Hiatt 1971 turtle Voucher: UCMP 72904
Mammalia
Multituberculata - Cimolomyidae	Cimolomys gracilis, Meniscoessus robustus Cimolomys gracilis Marsh 1889 multituberculate confirmed by Clemens 1964a Meniscoessus robustus Marsh 1889 multituberculate confirmed by Clemens 1964a
Multituberculata - Neoplagiaulacidae	Mesodma sp.³, Mesodma thompsoni³ Mesodma sp.³ Jepsen 1940 multituberculate Mesodma thompsoni³ Clemens 1964 multituberculate
Multituberculata - Cimolodontidae	Cimolodon nitidus³ Cimolodon nitidus³ Marsh 1889 multituberculate
Theriamorpha - Gypsonictopidae	Gypsonictops hypoconus, Gypsonictops hypoconus⁵ Gypsonictops hypoconus Simpson 1927 eutherian confirmed by Clemens 1973 Gypsonictops hypoconus⁵ Simpson 1927 eutherian
Cimolesta - Cimolestidae	Cimolestes incisus⁵, Cimolestes stirtoni⁵ Cimolestes incisus⁵ Marsh 1889 eutherian Cimolestes stirtoni⁵ Clemens 1973 eutherian
Theriamorpha - Stagodontidae	Didelphodon vorax¹ Didelphodon vorax¹ Marsh 1889 metatherian
Theriamorpha - Pediomyidae	"Pediomys hatcheri" = Protolambda hatcheri⁴, "Pediomys florencae" = Protolambda florencae⁴, Pediomys elegans⁴, "Pediomys cooki" = Leptalestes cooki⁴ "Pediomys hatcheri" = Protolambda hatcheri⁴ Osborn 1898 metatherian "Pediomys florencae" = Protolambda florencae⁴ Clemens 1966 metatherian Pediomys elegans⁴ Marsh 1889 metatherian this or any of the following three records may include "P. sp." "Pediomys cooki" = Leptalestes cooki⁴ Clemens 1966 metatherian
Actinopteri
Elopiformes - Elopidae	Elopidae indet.⁶ Elopidae indet.⁶ Bonaparte 1846
Aspidorhynchiformes - Aspidorhynchidae	Belonostomus longirostris⁶ Belonostomus longirostris⁶ Lambe 1902
Amiiformes - Amiidae	Amia uintaensis⁶, Amia fragosa⁶ Amia uintaensis⁶ Leidy 1873 bowfin Amia fragosa⁶ Jordan 1927 bowfin
Lepisosteiformes - Lepisosteidae	Lepisosteus occidentalis⁶ Lepisosteus occidentalis⁶ Leidy 1856 gar
Chondrichthyes
Rajiformes - Rhinobatidae	Myledaphus bipartitus⁷ Myledaphus bipartitus⁷ Cope 1876 guitarfish

¹Alroy 2002; ²Alroy 2007; ³Clemens 1964; ⁴Clemens 1966; ⁵Clemens 1973; ⁶Database 2005; ⁷Estes 1964; ⁸Estes 1965; ⁹Holroyd and Hutchison 2002; ¹⁰Larson and Currie 2013; ¹¹Sankey 2008