Sandstone Basin, UCMP V-80092: Lancian, Montana
collected 1980

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Cimolestidae
Cimolestes incisus Marsh 1889
1 specimen
Mammalia - Gypsonictopidae
Gypsonictops illuminatus Lillegraven 1969
3 specimens
Gypsonictops hypoconus Simpson 1927
Database 2005 2 specimens
Mammalia - Pediomyidae
Pediomys cooki Clemens 1966
Database 2005 1 specimen
recombined as Leptalestes cooki
Pediomys cf. hatcheri (Osborn 1898)
3 specimens
original and current combination Protolambda hatcheri
Mammalia - Stagodontidae
Didelphodon vorax Marsh 1889
4 specimens
Mammalia - Alphadontidae
Alphadon cf. marshi Simpson 1927
1 specimen
Mammalia - Glasbiidae
Glasbius twitchelli Archibald 1982
3 specimens
Mammalia - Multituberculata - Cimolomyidae
Essonodon browni Simpson 1927
2 specimens
Meniscoessus robustus (Marsh 1889)
9 specimens
Mammalia - Multituberculata - Cimolodontidae
? Cimolodon nitidus Marsh 1889
6 specimens
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma thompsoni Clemens 1964
3 specimens
Mesodma cf. formosa (Marsh 1889)
2 specimens
Reptilia - Testudines
Emarginochelys cretacea (Whetstone 1978)
Database 2005 1 specimen
original and current combination Emarginachelys cretacea
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
1 specimen
Reptilia - Testudines
Derrisemys sp. Hutchison 2009
Database 2005 1 specimen
    = Derrisemys sterea Hutchison 2009
Hutchison 2009
recombined as Hutchemys sterea
Reptilia - Baenidae
Baenidae indet. Cope 1882
Reptilia - Champsosauridae
Champsosauridae indet. Cope 1876
Reptilia
Coelurosauria indet. Huene 1914
"small... possibly ornithomimids"
Reptilia - Alvarezsauridae
Mononykinae indet. Chiappe et al. 1998
1 specimen
UCMP 154584 (pubis and partial ischium)
    = Alvarezsauridae indet. Bonaparte 1991
Fowler et al. 2020
Reptilia - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906
Reptilia - Dromaeosauridae
Richardoestesia cf. isosceles Sankey 2001
Sankey 2008 2 specimens
UCMP 186824-5
Reptilia - Ankylosauridae
Ankylosauridae indet. Brown 1908
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
1 specimen
    = Edmontosaurus cf. annectens Marsh 1892
Wosik et al. 2018
Reptilia - Ceratopsidae
Ceratopsidae indet. Marsh 1888
Triceratops sp. Marsh 1889
Scannella and Fowler 2014 3 specimens
MOR 2942
Reptilia
Pachycephalosaurus sp. Brown and Schlaikjer 1943
Database 2005 1 specimen
Reptilia - Crocodylia
Crocodylia indet. (Owen 1842)
Reptilia
Brachychampsa montana Gilmore 1911
Database 2005 3 specimens
Amphibia - Temnospondyli - Urodela
Habrosaurus sp. Gilmore 1928
Database 2005 1 specimen
Scapherpeton sp. Cope 1876
Actinopteri - Amiiformes - Amiidae
Amia sp. Linnaeus 1766
3 specimens
    = Melvius thomasi Bryant 1987
Database 2005
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843
see common names

Geography
Country:United States State/province:Montana County:Garfield
Coordinates: 47.7° North, 106.4° West (view map)
Paleocoordinates:54.3° North, 79.4° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
*Epoch:Senonian
*International age/stage:Late/Upper Maastrichtian *Local age/stage:Lancian
Key time interval:Lancian
Age range of interval:72.10000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Hell Creek
Stratigraphic resolution:bed
Stratigraphy comments: The locality is a small shallow wash with extensive exposures of a bone-rich basal lag of the Ten Meter Sand (Hartman et al., 2014; Fowler, 2016). The Ten Meter Sand occurs ~10 m below the contact with the overlying Fort Union Formation (which is visible in adjacent cliffs ~100 m to the east), hence V80092/HC-530 is located in the upper part of the upper third of the Hell Creek Formation
Lithology and environment
Primary lithology: sandstone
Includes fossils?Y
Lithology description: "a sandstone channel filling" (Hutchinson and Chiappe 1998)
Environment:coarse channel fill
Geology comments: "channel filling"
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:good
Articulated whole bodies:none
Associated major elements:none
Disassociated major elements:none
Disassociated minor elements:all
Fragmentation:occasional
Temporal resolution:snapshot
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:UCMP
Collection dates:1980
Taxonomic list comments:most non-mammals not identified to genus or species
A replication of this collection (10762) was entered by Carrano based on Hutchinson and Chiappe 1998 and the UCMP collections database; all relevant information has been moved here, and 10762 had been deleted
Metadata
Also known as:UCMP locality V80092; MOR HC-530, Doldrums
Database number:14616
Authorizer:J. Alroy, P. Holroyd, M. Carrano, P. Mannion Enterer:J. Alroy, P. Mannion, M. Carrano, P. Holroyd
Modifier:M. Carrano Research group:vertebrate
Created:1998-09-21 00:00:00 Last modified:2022-09-29 15:43:19
Access level:the public Released:1998-09-21 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1987.5% 2040J. R. Hutchinson and L. M. Chiappe. 1998. The first known alvarezsaurid (Theropoda: Aves) from North America. Journal of Vertebrate Paleontology 18(3):447-450 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

13103 U.C.M.P. Database. 2005. UCMP collections database. University of California Museum of Paleontology [M. Carrano/M. Carrano/M. Carrano]
75223 D. W. Fowler, J. P. Wilson, E. A. Freedman Fowler, C. R. Noto, D. Anduza and J. R. Horner. 2020. Trierarchuncus prairiensis gen. et sp. nov., the last alvarezsaurid: Hell Creek Formation (uppermost Maastrichtian), Montana. Cretaceous Research 116:104560 [P. Mannion/P. Mannion]
58298 J. H. Hutchison. 2009. New soft-shelled turtles (Plastomeninae, Trionychidae, Testudines) from the Cretaceous and Paleocene of North America. PaleoBios 29(2):36-47 [P. Holroyd/P. Holroyd]
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]
82752 J. B. Scannella and D. W. Fowler. 2014. A stratigraphic survey of Triceratops localities in the Hell Creek Formation, northeastern Montana (2006–2010). In G. P. Wilson, W. A. Clemens, J. R. Horner, & J. H. Hartman (eds.), Through the End of the Cretaceous in the Type Locality of the Hell Creek Formation in Montana and Adjacent Areas. Geological Society of America Special Paper 503:313-332 [M. Carrano/M. Carrano]
67361 M. Wosik, M. B. Goodwin, and D. C. Evans. 2018. A nestling-sized skeleton of Edmontosaurus (Ornithischia, Hadrosauridae) from the Hell Creek Formation of northeastern Montana, U.S.A., with an analysis of ontogenetic limb allometry. Journal of Vertebrate Paleontology (e1398168)1-19 [P. Holroyd/P. Holroyd]