Altman Blowout: Lancian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes
? Osteichthyes indet. Huxley 1880
Database 2005 1 element
Mammalia - Pediomyidae
Pediomys florencae Clemens 1966
Clemens 1966
recombined as Protolambda florencae
Pediomys hatcheri (Osborn 1898)
Clemens 1966
original and current combination Protolambda hatcheri
Pediomys cooki Clemens 1966
Clemens 1966
recombined as Leptalestes cooki
Pediomys elegans Marsh 1889
Clemens 1966
this or any of the following three records may include "P. sp."
Mammalia - Stagodontidae
Ectoconodon petersoni Osborn 1898
    = Didelphodon vorax Marsh 1889
Alroy 2002
see also Clemens 1966
Mammalia - Gypsonictopidae
Gypsonictops hypoconus Simpson 1927
confirmed by Clemens 1973
Euangelistes petersoni Simpson 1929
    = Gypsonictops hypoconus Simpson 1927
Clemens 1973
Mammalia - Cimolestidae
Cimolestes incisus Marsh 1889
Clemens 1973
Cimolestes stirtoni Clemens 1973
Clemens 1973
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma formosa (Marsh 1889)
    = Mesodma sp. Jepsen 1940
Clemens 1964
Mesodma thompsoni Clemens 1964
Clemens 1964
Mammalia - Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889
Clemens 1964
Mammalia - Multituberculata - Cimolomyidae
Meniscoessus robustus (Marsh 1889)
confirmed by Clemens 1964a
Cimolomys gracilis Marsh 1889
confirmed by Clemens 1964a
Reptilia
Reptilia indet. Laurenti 1768
Database 2005 2 specimens
Reptilia - Chamopsiidae
Chamops segnis Marsh 1892
Database 2005 11 specimens
Meniscognathus altmani Estes 1964
Database 2005 3 specimens
Reptilia - Boidae
Boidae indet. Gray 1825
Database 2005 1 specimen
Reptilia - Anguidae
Odaxosaurus piger (Gilmore 1928)
Database 2005 2 specimens
Reptilia
Compsemys sp. Leidy 1856
Holroyd and Hutchison 2002
Voucher: UCMP 72895
Compsemys victa (Leidy 1856)
Database 2005 1 specimen
Reptilia - Baenidae
Baenidae indet. Cope 1882
Database 2005 2 specimens
Baenidae sp. Cope 1882
Holroyd and Hutchison 2002
Voucher: UCMP 72935
Stygiochelys sp. Gaffney and Hiatt 1971
Database 2005 1 specimen
cf. Stygiochelys sp. Gaffney and Hiatt 1971
Holroyd and Hutchison 2002
Voucher: UCMP 72904
Reptilia - Testudines
Cryptodira indet. Cope 1868
Database 2005 2 specimens
? Cryptodira indet. Cope 1868
Database 2005 1 specimen
Reptilia - Testudines - Chelydridae
Chelydridae indet. Swainson 1839
Database 2005 2 specimens
Chelydridae sp. Swainson 1839
Holroyd and Hutchison 2002
Voucher: UCMP 72907
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
Database 2005 1 specimen
Trionychidae sp. Gray 1825
Holroyd and Hutchison 2002
Voucher: UCMP 73027
Aspideretes sp. Hay 1904
Database 2005 1 specimen
    = Trionychinae indet. Gray 1825
Alroy 2007
Aspiderites sp. (Hay 1904)
Holroyd and Hutchison 2002
original and current combination Aspideretes
Voucher: UCMP 173369
Reptilia - Testudines - Emydidae
? Emydinae indet. Rafinesque 1815
Database 2005 1 specimen
Reptilia - Testudines - Nanhsiungchelyidae
Basilemys sp. Hay 1902
Holroyd and Hutchison 2002
Voucher: UCMP 72902
Basilemys sinuosa Riggs 1906
Database 2005 1 specimen
Reptilia - Archosauria
Archosauria indet. Cope 1869
Database 2005 1 specimen
Reptilia
Leidyosuchus sternbergi (Gilmore 1910)
Database 2005 1 specimen
recombined as Borealosuchus sternbergii
Brachychampsa montana Gilmore 1911
Database 2005 1 specimen
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
Database 2005 1 specimen
Reptilia
Ceratopsia indet. Marsh 1890
Database 2005 1 specimen
Reptilia - Ceratopsidae
Triceratops sp. Marsh 1889
Database 2005 1 specimen
Reptilia - Hadrosauridae
Anatosaurus sp. Lull and Wright 1942
Database 2005 1 specimen
synonym of Edmontosaurus
Reptilia - Theropoda
Theropoda indet. Marsh 1881
Database 2005 1 specimen
Reptilia
? Coelurosauria indet. Huene 1914
Database 2005 1 specimen
cf. Paronychodon lacustris Cope 1876
Sankey 2008 1 specimen
nomen dubium belonging to Paronychodon
Reptilia - Troodontidae
Troodon sp. Leidy 1856
Sankey 2008 2 specimens
UCMP 186886, 214059
    = Pectinodon bakkeri Carpenter 1982
Larson and Currie 2013
Reptilia - Dromaeosauridae
Dromaeosauridae indet. Colbert and Russell 1969
Database 2005 1 specimen
Richardoestesia sp. Currie et al. 1990
Database 2005 1 specimen
Reptilia - Tyrannosauridae
Aublysodon mirandus Leidy 1868
Database 2005 2 specimens
nomen dubium belonging to Tyrannosauridae
Reptilia - Saurischia
Saurischia indet. Seeley 1888
Database 2005 2 specimens
Reptilia - Sauria
Sauria indet. MacCartney 1802
Database 2005 19 specimens
Reptilia
Champsosaurus sp. Cope 1876
Database 2005 1 specimen
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
Database 2005 1 specimen
Amphibia - Temnospondyli - Batrachosauroididae
Opisthotriton kayi Auffenberg 1961
Database 2005 1 specimen
Prodesmodon copei Estes 1964
Database 2005 1 specimen
Amphibia - Temnospondyli - Urodela
Scapherpeton tectum Cope 1876
Database 2005 2 specimens
Lisserpeton bairdi Estes 1965
Estes 1965 1 specimen
Habrosaurus dilatus Gilmore 1928
Database 2005 2 specimens
Actinopteri - Amiiformes - Amiidae
Amia uintaensis (Leidy 1873)
Database 2005 1 element
nomen dubium belonging to Amiinae
Amia fragosa Jordan 1927
Database 2005 14 elements
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis (Leidy 1856)
Database 2005 3 elements
original and current combination Lepidotus occidentalis
Actinopteri - Elopiformes - Elopidae
Elopidae indet. Bonaparte 1846
Database 2005 1 element
Actinopteri - Aspidorhynchiformes - Aspidorhynchidae
Belonostomus longirostris (Lambe 1902)
Database 2005 21 elements
Chondrichthyes - Rajiformes - Rhinobatidae
Myledaphus bipartitus Cope 1876
Estes 1964 1 element
see common names

Geography
Country:United States State/province:Wyoming County:Niobrara
Coordinates: 43.2° North, 104.5° West (view map)
Paleocoordinates:49.6° North, 79.4° 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
Formation:Lance
Stratigraphic resolution:group of beds
Stratigraphy comments: from a single blowout
Lithology and environment
Primary lithology: not reported
Lithology description: none given
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Lagerst�tten type:concentrate
Degree of concentration:concentrated
Size of fossils:mesofossils
Articulated whole bodies:none
Associated major elements:none
Disassociated major elements:none
Disassociated minor elements:all
Collection methods and comments
Collection methods:anthill,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:UCMP
Collection method comments: "almost all from anthills"
Taxonomic list comments:"? aff. Microcosmodon sp." is probably a dinosaur fragment: Clemens 1964a
"Delphodon sp.": status unclear, apparently not discussed by Clemens 1966
Metadata
Also known as:UCMP V-5616
Database number:14505
Authorizer:J. Alroy, M. Carrano, R. Benson Enterer:J. Alroy, M. Carrano, R. Benson
Modifier:P. Mannion Research group:vertebrate
Created:1994-07-26 00:00:00 Last modified:2022-02-03 07:40:14
Access level:the public Released:1994-07-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
3880.5% 43380A. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
19636 J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy]
1239 W. A. Clemens. 1964. Fossil mammals of the type Lance Formation, Wyoming. Part I. Introduction and Marsupialia. University of California Publications in Geological Sciences 48:1-105 [J. Alroy/J. Alroy/J. Alroy]
1241 W. A. Clemens. 1966. Fossil mammals from the type Lance Formation, Wyoming. Part II. Marsupialia. University of California Publications in Geological Sciences 62:1-122 [J. Alroy/J. Alroy/J. Alroy]
1242 W. A. Clemens. 1973. Fossil mammals of the type Lance Formation, Wyoming. Part III. Eutheria and summary. University of California Publications in Geological Sciences 94:1-102 [J. Alroy/J. Alroy/J. Alroy]
13103 U.C.M.P. Database. 2005. UCMP collections database. University of California Museum of Paleontology [M. Carrano/M. Carrano/M. Carrano]
803 R. Estes. 1964. Fossil vertebrates from the Late Cretaceous Lance Formation, eastern Wyoming. University of California Publications in Geological Sciences 49:1-187 [J. Alroy/M. Sommers/M. Carrano]
43775% 41840R. Estes. 1965. A new fossil salamander from Montana and Wyoming. Copeia 1965(1):90-95 [E. Fara/E. Fara/J. Alroy]
42536 P. A. Holroyd and J. H. Hutchison. 2002. Patterns of geographic variation in latest Cretaceous vertebrates: evidence from the turtle component. Geological Society of America Special Paper 361:177-190 [R. Benson/R. Benson]
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]
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]