Ken's Site: Lancian, Colorado
collected by K. Carpenter 1977

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Ornithischia
Ornithischia indet. Seeley 1888
4 specimens
Reptilia - Ceratopsidae
Triceratops sp. Marsh 1889
Reptilia
Thescelosaurus sp. Gilmore 1913
Reptilia - Dromaeosauridae
Dromaeosauridae indet. Colbert and Russell 1969
Reptilia - Tyrannosauridae
cf. Tyrannosaurus rex Osborn 1905
Reptilia
Leidyosuchus sternbergi (Gilmore 1910)
recombined as Borealosuchus sternbergii
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
2 specimens
Reptilia
Brachychampsa montana Gilmore 1911
Champsosaurus sp. Cope 1876
Reptilia - Sauria
Sauria indet. MacCartney 1802
2 specimens
Reptilia
Compsemys victa (Leidy 1856)
Reptilia - Baenidae
Baenidae indet. Cope 1882
Hutchison and Holroyd 2003
Reptilia - Testudines
Testudines indet. Batsch 1788
2 specimens
Reptilia - Testudines - Adocidae
Adocus sp. Cope 1868
Adocus sp. Cope 1868
Hutchison and Holroyd 2003
Reptilia - Testudines - Trionychidae
subgenus Adocus
    = Trionychidae indet. Gray 1825
Alroy 2006
Trionychidae indet. (Gray 1825)
Hutchison and Holroyd 2003
Trionychinae indet. Gray 1825
Hutchison and Holroyd 2003
Reptilia - Anguidae
Odaxosaurus piger (Gilmore 1928)
Reptilia - Chamopsiidae
Chamopsiidae informal Laramie chamopsiid
Longrich et al. 2012 1 specimen
UCM 42164: an unnamed chamopsiid from Colorado (Fig. 1C), characterized by enlarged back teeth
Mammalia
Mammalia indet. Linnaeus 1758
Mammalia - Gypsonictopidae
Gypsonictops sp. Simpson 1927
Mammalia - Multituberculata
Multituberculata indet. Cope 1884
Mammalia - Multituberculata - Cimolodontidae
cf. Cimolodon sp. Marsh 1889
Wilson et al. 2010
UWBM specimen
Mammalia - Multituberculata - Cimolomyidae
Meniscoessus sp. Cope 1882
Cimolomys sp. Marsh 1889
Amphibia - Temnospondyli - Albanerpetontidae
Albanerpeton sp. Estes and Hoffstetter 1976
2 specimens
UCM 38713, 38714
    = Albanerpeton nexuosus Estes 1981
Gardner 2000
Amphibia - Temnospondyli
Caudata indet. Scopoli 1777
7 specimens
Amphibia - Temnospondyli - Batrachosauroididae
Opisthotriton kayi Auffenberg 1961
Amphibia - Temnospondyli - Urodela
Scapherpeton tectum Cope 1876
Lisserpeton bairdi Estes 1965
Actinopteri - Lepisosteiformes - Lepisosteidae
? Atractosteus occidentalis (Leidy 1856)
original and current combination Lepidotus occidentalis
Actinopteri - Amiiformes - Amiidae
Amia sp. Linnaeus 1766
Actinopteri
Teleostei indet. MĂĽller 1846
9 specimens
Chondrichthyes - Hybodontiformes - Lonchidiidae
Lonchidion selachos Estes 1964
Chondrichthyes - Orectolobiformes - Orectolobidae
Squatirhina americana Estes 1964
recombined as Restesia americana
Chondrichthyes - Rajiformes - Sclerorhynchidae
Ischyrhiza cf. avonicola Estes 1964
Chondrichthyes - Rajiformes - Rhinobatidae
Myledaphus bipartitus Cope 1876
see common names

Geography
Country:United States State/province:Colorado County:Weld
Coordinates: 40.4° North, 104.5° West (view map)
Paleocoordinates:46.9° North, 80.4° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
*Period:Late/Upper Cretaceous *Epoch:Senonian
Key time interval:Lancian
Age range of interval:70.60000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Laramie
Regional section:Pawnee National Grassland Regional bed:95 m
Regional order:bottom to top
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology:gray mudstone
Secondary lithology:"cross stratification",yellow sandstone
Includes fossils?Y
Lithology description: "dark silty shales and clays of overbank deposits overlain by a yellow cross-bedded, lenticular sandstone" (Carpenter 1979) "upper very fine to lower fine sandstone beds alternating with grey mudstone and siltstone beds with ripple marks" with "abundant iron oxide concretions and weathered layers, especially near the top of the section, which is about 5 m high"; "most fossils... are found at the base of the exposures in a dark grey mudstone layer" (Wilson et al. 2010)
Environment:"floodplain"
Geology comments: "channel and overbank deposits" (Carpenter 1979)
"an off-channel and overbank depositional environment" (Wilson et al. 2010)
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Articulated whole bodies:none
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:many
Collection methods and comments
Collection methods:bulk,chemical,sieve,field collection
Collection size:11 specimens
Rock censused:300 kg
Reason for describing collection:taxonomic analysis
Museum repositories:DMNH,UCM
Collectors:K. Carpenter Collection dates:1977
Collection method comments: "laboratory washing and screening" with matrix "soaked overnight in hydrogen peroxide"; "~300 kg" were screened by Carpenter in 1977 according to Wilson et al. 2010
Metadata
Also known as:UCM Loc. 77062; DMNH loc. 3426; UWBM loc. C1099
Database number:14640
Authorizer:J. Alroy, R. Benson, P. Holroyd, M. Carrano Enterer:J. Alroy, M. Carrano, R. Benson, P. Holroyd
Modifier:M. Carrano Research group:vertebrate
Created:1993-09-27 00:00:00 Last modified:2017-07-14 15:23:40
Access level:the public Released:1993-09-27 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

717. K. Carpenter. 1979. Vertebrate fauna of the Laramie Formation (Maestrichtian), Weld County, Colorado. Contributions to Geology, University of Wyoming 17(1):37-49 [J. Alroy/M. Sommers]

Secondary references:

18120 J. Alroy. 2006. Synonymies and reidentifications of North American fossil vertebrates. [J. Alroy/J. Alroy/J. Alroy]
42675 J. D. Gardner. 2000. Albanerpetontid amphibians from the Upper Cretaceous (Campanian and Maastrichtian) of North America. Geodiversitas 22(3):349-388 [M. Carrano/M. Carrano/M. Carrano]
14441ETE P. A. Holroyd and J. H. Hutchison. 2002. Late Cretaceous and Early Paleocene turtle biogeography: new data from the Denver Basin, Colorado. GSA Abstracts with Programs [M. Carrano/M. Carrano/P. Holroyd]
26071 J. H. Hutchison and P. A. Holroyd. 2003. Late Cretaceous and early Paleocene turtles of the Denver Basin, Colorado. Rocky Mountain Geology 38(1):121-142 [P. Holroyd/P. Holroyd]
43992 N. R. Longrich, B.-A. S. Bhullar, and J. A. Gauthier. 2012. Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary. Proceedings of the National Academy of Sciences 109(52):21396-21401 [R. Benson/R. Benson/T. Liebrecht]
61518 D. B. Weishampel and J. B. Weishampel. 1983. Annotated localities of ornithopod dinosaurs: implications to Mesozoic paleobiogeography. The Mosasaur 1:43-87 [M. Carrano/M. Carrano]
32620 G. P. Wilson, M. Dechesne, and I. R. Anderson. 2010. New latest Cretaceous mammals from northeastern Colorado with biochronologic and biogeographic implications. Journal of Vertebrate Paleontology 30(2):499-520 [J. Alroy/J. Alroy]