Hartless: Lancian, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Temnospondyli
Theatonius lancensis Fox 1976
Gardner and DeMar 2013
Amphibia - Temnospondyli - Batrachosauroididae
Opisthotriton kayi Auffenberg 1961
Gardner and DeMar 2013
Prodesmodon copei Estes 1964
Gardner and DeMar 2013
Amphibia - Temnospondyli - Urodela
Habrosaurus dilatus Gilmore 1928
Gardner and DeMar 2013
Habrosaurus prodilatus Gardner 2003
Gardner and DeMar 2013
Scapherpetontidae informal indet. 1 (Auffenberg and Goin 1959)
Gardner and DeMar 2013
"gen. et sp. nov. 1"
Scapherpetontidae informal indet. 2 (Auffenberg and Goin 1959)
Gardner and DeMar 2013
"gen. et sp. nov. 2"
Scapherpeton tectum Cope 1876
Gardner and DeMar 2013
Lisserpeton bairdi Estes 1965
Gardner and DeMar 2013
Piceoerpeton naylori Gardner 2012
Gardner and DeMar 2013
Paranecturus garbanii n. gen., n. sp. DeMar 2013
3 specimens
Holotype: UWBM93370 (Figs. 2, 3), incomplete atlas missing neural arch roof, crest, and spine, anterior portion of odontoid process, and portions of the anterior and posterior cotylar rims; plus MOR V99230, V99369
Amphibia - Temnospondyli - Albanerpetontidae
Albanerpeton nexuosum (Estes 1981)
Gardner and DeMar 2013
original and current combination Albanerpeton nexuosus
Albanerpeton galaktion Fox and Naylor 1982
Gardner and DeMar 2013
Reptilia - Testudines
Derrisemys sterea Hutchison 2009
Hutchison 2009
recombined as Hutchemys sterea
Actinopteri
Teleostei informal indet. U-4 (Müller 1846)
Brinkman et al. 2021 12 specimens
UWBM 98189, abdominal centra; UWBM 106484, one abdominal centrum
Osteoglossomorpha indet. Greenwood et al. 1966
Brinkman et al. 2021 47 specimens
= Coriops/Lopadichthys; UWBM 98115, centra of small size; UWBM 106483, centra of small size; UWBM 106491, centra of small size
Actinopteri - Osteoglossiformes
? Wilsonichthys sp. Murray et al. 2016
Brinkman et al. 2021 9 specimens
UWBM 106485, centra type BvE; UWBM 98094, centrum type BvA
Wilsonichthys aridinsulensis Murray et al. 2016
Brinkman et al. 2021 39 specimens
Actinopteri - Hiodontiformes - Hiodontidae
Hiodontidae informal indet. small morph
Brinkman et al. 2021 6 specimens
UWBM 98060, centra of small size
Actinopteri - Esociformes - Esocidae
Estesesox sp. Wilson et al. 1992
Brinkman et al. 2021 74 specimens
UWBM 98177, centrum type NvC; UWBM 106582, centrum types NvC and NvE; UWBM 98107, centrum type NvD; UWBM 98158, centrum type NvE
Actinopteri
Acanthomorpha informal indet. HC-1 (Rosen 1973)
Brinkman et al. 2021 68 specimens
spelled with current rank as Acanthomorphata
UWBM 98195, centra
Acanthomorpha informal indet. HC-2 (Rosen 1973)
Brinkman et al. 2021 17 specimens
spelled with current rank as Acanthomorphata
UWBM 98154, abdominal centra; UWBM 106490, one abdominal centrum
Acanthomorpha informal indet. HC-4 (Rosen 1973)
Brinkman et al. 2021 2 specimens
spelled with current rank as Acanthomorphata
UWBM 98131, abdominal centra
Acanthomorpha informal indet. HC-6 (Rosen 1973)
Brinkman et al. 2021 2 specimens
spelled with current rank as Acanthomorphata
UWBM 98182, abdominal centra
Actinopteri - Sciaenidae
Platacodon nanus Marsh 1889
Brinkman et al. 2021 1 specimen
UWBM 100991, tooth
Actinopteri
Otophysi informal indet. U-3/BvD
Brinkman et al. 2021 7 specimens
corrected as Otophysa
UWBM 98187, anterior Weberian centrum (type U3); UWBM 106486, (type U3); UWBM 98121, abdominal centra (centrum type BvD); UWBM 106487, an abdominal centrum (centrum type BvD)
see common names

Geography
Country:United States State/province:Montana County:Garfield
Coordinates: 47.3° North, 107.1° West (view map)
Paleocoordinates:54.1° 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
Key time interval:Lancian
Age range of interval:70.60000 - 66.00000 m.y. ago
Stratigraphy
Formation:Hell Creek
Stratigraphic resolution:bed
Stratigraphy comments: Approximately 41.2 m below the Hell Creek–Tullock formational contact
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:UWBM
Metadata
Also known as:UCMP V82022; UCMP V-82022; UWBM C1153
Database number:144499
Authorizer:P. Mannion, M. Carrano, P. Holroyd, R. Benson Enterer:P. Mannion, M. Carrano, P. Holroyd, R. Benson
Modifier:M. Carrano Research group:vertebrate
Created:2013-05-08 19:59:50 Last modified:2023-08-11 16:18:41
Access level:the public Released:2013-05-08 19:59:50
Creative Commons license:CC BY
Reference information

Primary reference:

46719. D. G. DeMar, Jr. 2013. A new fossil salamander (Caudata, Proteidae) from the Upper Cretaceous (Maastrichtian) Hell Creek Formation, Montana, U.S.A. Journal of Vertebrate Paleontology 33(3):588-598 [P. Mannion/P. Mannion/P. Holroyd]

Secondary references:

85648 D. B. Brinkman, J. D. Divay, D. G. DeMar and G. P. Wilson Mantilla. 2021. A systematic reappraisal and quantitative study of the nonmarine teleost fishes from the late Maastrichtian of the Western Interior of North America: evidence from vertebrate microfossil localities. Canadian Journal of Earth Sciences 58(9):936-967 [M. Carrano/M. Carrano]
65027 J. D. Gardner and D. G. DeMar. 2013. Mesozoic and Palaeocene lissamphibian assemblages of North America: a comprehensive review. Palaeobiodiversity and Palaeoenvironments 93:459-515 [P. Holroyd/P. Holroyd/M. Carrano]
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]
46720 X. R. Wang, Q. Ji, F. F. Teng and K. M. Jin. 2013. A new species of Yanornis (Aves: Ornithurae) from the Lower Cretaceous strata of Yixian, Liaoning Province. Geological bulletin of China 32(4):601-606 [R. Benson/R. Benson/R. Benson]