Engdahl Anthills 1: Lancian, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes
Osteichthyes indet. Huxley 1880
Database 2005 5 elements
Reptilia - Dinosauria
Dinosauria indet. Owen 1842
Database 2005 1 specimen
Reptilia - Ceratopsidae
Ceratopsidae indet. Marsh 1888
Database 2005 1 specimen
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
Database 2005 1 specimen
Reptilia - Theropoda
Megalosauridae indet. (Fitzinger 1843)
Database 2005 2 specimens
    = Theropoda indet. Marsh 1881
Carrano 2023
Reptilia
? Coelurosauria indet. Huene 1914
Database 2005 1 specimen
Reptilia - Coeluridae
Coeluridae indet. Marsh 1881
Database 2005 1 specimen
Reptilia - Caenagnathidae
Chirostenotes sp. Gilmore 1924
Database 2005 1 specimen
Reptilia
Paronychodon lacustris Cope 1876
Database 2005 1 specimen
nomen dubium belonging to Paronychodon
Reptilia - Dromaeosauridae
Dromaeosauridae indet. Colbert and Russell 1969
Database 2005 2 specimens
Reptilia
Aves indet. Linnaeus 1758
Database 2005 1 specimen
Leidyosuchus sternbergi (Gilmore 1910)
Database 2005 1 specimen
recombined as Borealosuchus sternbergii
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
Database 2005 2 specimens
Reptilia
Brachychampsa montana Gilmore 1911
Database 2005 1 specimen
Champsosaurus natator Parks 1933
Database 2005 1 specimen
Reptilia - Sauria
Sauria indet. MacCartney 1802
Database 2005 1 specimen
cf. Sauria indet. MacCartney 1802
Database 2005 1 specimen
Reptilia
Compsemys sp. Leidy 1856
Database 2005 1 specimen
Compsemys victa (Leidy 1856)
Database 2005 2 specimens
Reptilia - Baenidae
Baenidae indet. Cope 1882
Database 2005 5 specimens
? Baenidae indet. Cope 1882
Database 2005 1 specimen
Reptilia - Testudines - Chelydridae
Chelydridae indet. Swainson 1839
Database 2005 1 specimen
Reptilia - Testudines - Adocidae
Adocus sp. Cope 1868
Database 2005 4 specimens
Reptilia - Testudines
Helopanoplia sp. Hay 1908
Database 2005 1 specimen
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
Database 2005 4 specimens
Trionychinae indet. Gray 1825
Database 2005 1 specimen
Mammalia - Gypsonictopidae
Gypsonictops cf. illuminatus Lillegraven 1969
Mammalia - Alphadontidae
Alphadon marshi Simpson 1927
    = Alphadon sp. Simpson 1927
Alroy 2002
possibly A. jasoni in light of Johanson 1996b
Mammalia - Stagodontidae
Didelphodon vorax Marsh 1889
Mammalia - Glasbiidae
Glasbius twitchelli Archibald 1982
Mammalia - Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma thompsoni Clemens 1964
Amphibia - Temnospondyli - Urodela
Scapherpeton tectum Cope 1876
Database 2005 2 specimens
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825
Database 2005 1 element
Lepisosteus occidentalis (Leidy 1856)
Database 2005 33 elements
original and current combination Lepidotus occidentalis
Actinopteri - Amiiformes - Amiidae
Amia fragosa Jordan 1927
Database 2005 1 element
Amia uintaensis (Leidy 1873)
Database 2005 1 element
nomen dubium belonging to Amiinae
Actinopteri - Amiiformes - Palaeolabridae
Palaeolabrus sp. Casier 1967
Database 2005 1 element
Actinopteri - Siluriformes
Siluriformes indet.
Database 2005 1 element
Chondrichthyes - Hybodontiformes - Lonchidiidae
Lonchidion selachos Estes 1964
Database 2005 2 elements
Chondrichthyes - Rajiformes - Rhinobatidae
Myledaphus bipartitus Cope 1876
Database 2005 2 elements
see common names

Geography
Country:United States State/province:Montana County:Garfield
Coordinates: 47.6° North, 107.1° West (view map)
Paleocoordinates:54.4° North, 80.2° 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:70.60000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Hell Creek
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: sandstone
Includes fossils?Y
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:mesofossils
Disassociated major elements:many
Disassociated minor elements:many
Collection methods and comments
Collection methods:bulk,anthill,sieve,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:UCMP
Metadata
Also known as:UCMP V-72212
Database number:14533
Authorizer:J. Alroy, M. Carrano Enterer:J. Alroy, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2009-06-19 17:04:16
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

960. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
14199ETE M. T. Carrano. 2023. Taxonomic opinions on the Dinosauria. [M. Carrano/M. Carrano/M. Carrano]
13103 U.C.M.P. Database. 2005. UCMP collections database. University of California Museum of Paleontology [M. Carrano/M. Carrano/M. Carrano]