Alexander: Puercan, Colorado
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Crocodylia
|
||||||||||
Leidyosuchus sp.
Lambe 1907
|
Middleton and Dewar 2004 | |||||||||
uncommon | ||||||||||
= Crocodylia indet.
Owen 1842
|
Alroy 2007 | |||||||||
Reptilia
- Crocodylidae
|
||||||||||
Crocodylidae indet.
Cuvier 1807
|
Middleton and Dewar 2004 | |||||||||
abundant | ||||||||||
Reptilia
|
||||||||||
Allognathosuchus sp.
Mook 1921
|
Middleton and Dewar 2004 | |||||||||
common | ||||||||||
Compsemys victa
(Leidy 1856)
|
Middleton and Dewar 2004 | |||||||||
uncommon | ||||||||||
Reptilia
- Baenidae
|
||||||||||
Baenidae indet.
Cope 1882
|
Middleton and Dewar 2004 | |||||||||
common | ||||||||||
Reptilia
- Testudines
- Trionychidae
|
||||||||||
Trionyx sp.
Geoffroy Saint-Hilaire 1809
|
Middleton and Dewar 2004 | |||||||||
common | ||||||||||
= Trionychidae indet.
Gray 1825
|
Alroy 2007 | |||||||||
Reptilia
- Squamata
|
||||||||||
Squamata indet.
Oppel 1811
|
Sullivan and Lucas 1996 | 12 specimens | ||||||||
UCM 34618, medial part of right dentary with basal tooth remnants; 34959, medial fragment of left dentary with an incomplete tooth; 34992, medial part of right dentary lacking teeth; 35005, vertebra; 37608, dentary fragment with two complete teeth; 38862, distal end and shaft of humerus; 38875, ?dentary fragments; 39542, fragment of right dentary with splenial and three complete teeth; 43746, two articulated vertebra; 47293, axis? vertebra; 47300, osteoderms and two dentary fragments; and unnumbered, posterior part of right dentary. | ||||||||||
Reptilia
- Anguidae
|
||||||||||
Anguidae indet.
Gray 1825
|
Sullivan and Lucas 1996 | 1 specimen | ||||||||
UCM 34993, posterior part of right dentary | ||||||||||
cf. Odaxosaurus piger
(Gilmore 1928)
|
Sullivan and Lucas 1996 | 1 specimen | ||||||||
UCM 34991, posterior part of left maxilla with four teeth | ||||||||||
Reptilia
- Contogeniidae
|
||||||||||
Palaeoscincosaurus middletoni n. gen., n. sp.
Sullivan and Lucas 1996
|
Sullivan and Lucas 1996 | 7 specimens | ||||||||
UCM 34621 (holotype), medial part of left mandible with two teeth; UCM nos. 34623, posterior part of left maxilla with six teeth; 34624, medial part of right mandible with three teeth; 34994, articulated anterior portions of right maxilla and mandible; 35064, medial and posterior part of right mandible with five teeth; 35065, posterior part of right maxilla with four teeth; and 39543, medial part of left mandible with two teeth. | ||||||||||
cf. Palaeoscincosaurus middletoni
Sullivan and Lucas 1996
|
Sullivan and Lucas 1996 | 1 specimen | ||||||||
UCM 48762, posterior part of left maxilla with seven teeth | ||||||||||
Reptilia
- Globauridae
|
||||||||||
aff. Contogenys sp.
Estes 1969
|
Middleton and Dewar 2004 | |||||||||
new genus, aff. Contogenys; uncommon | ||||||||||
Mammalia
- Proteutheria
|
||||||||||
Proteutheria indet.
Romer 1966
|
||||||||||
Mammalia
- Cimolestidae
|
||||||||||
Procerberus grandis n. sp.
Middleton and Dewar 2004
|
||||||||||
Procerberus andesiticus n. sp.
Middleton and Dewar 2004
|
||||||||||
Mammalia
- Periptychidae
|
||||||||||
? Tinuviel gazini
|
||||||||||
(1 measurement) | ||||||||||
= Alticonus gazini n. gen., n. sp.
Eberle and Lillegraven 1998
|
Eberle and Lillegraven 1998 | |||||||||
originally an unpublished name | ||||||||||
Ampliconus browni n. gen., n. sp.
Eberle and Lillegraven 1998
|
||||||||||
originally an unpublished name | ||||||||||
Conacodon matthewi n. sp.
Middleton and Dewar 2004
|
||||||||||
Oxyacodon archibaldi n. sp.
Middleton and Dewar 2004
|
||||||||||
recombined as Miniconus archibaldi | ||||||||||
Auraria urbana n. gen., n. sp.
Middleton and Dewar 2004
|
Middleton and Dewar 2004 | |||||||||
Mammalia
- Procreodi
- Arctocyonidae
|
||||||||||
Arctocyonidae indet.
Murray 1866
|
||||||||||
Oxyclaenus subbituminus n. sp.
Middleton and Dewar 2004
|
||||||||||
Baioconodon cannoni
Middleton and Dewar 2004
|
||||||||||
= Baioconodon sp.
Gazin 1941
|
Alroy 2002 | |||||||||
(unpublished name) | ||||||||||
Baioconodon denverensis
Gazin 1941
|
||||||||||
Oxyprimus cf. galadrielae
Van Valen 1978
|
||||||||||
Mammalia
|
||||||||||
Peradectes pusillus
(Matthew and Granger 1921)
|
||||||||||
= Thylacodon pusillus
Matthew and Granger 1921
|
Alroy 2002 | |||||||||
Mammalia
- Multituberculata
|
||||||||||
Cimexomys arapahoensis n. sp.
Middleton and Dewar 2004
|
||||||||||
Cimexomys minor
Sloan and Van Valen 1965
|
||||||||||
Mammalia
- Multituberculata
- Neoplagiaulacidae
|
||||||||||
Mesodma cf. ambigua
Jepsen 1940
|
||||||||||
Xyronomys robinsoni n. sp.
Middleton and Dewar 2004
|
||||||||||
Mammalia
- Multituberculata
- Ptilodontidae
|
||||||||||
Kimbetohia mziae n. sp.
Middleton and Dewar 2004
|
||||||||||
Mammalia
- Multituberculata
- Taeniolabididae
|
||||||||||
Catopsalis alexanderi n. sp.
Middleton 1982
|
||||||||||
(6 measurements) | ||||||||||
Amphibia
- Temnospondyli
- Batrachosauroididae
|
||||||||||
Opisthotriton cf. kayi
Auffenberg 1961
|
Middleton and Dewar 2004 | |||||||||
rare | ||||||||||
= Opisthotriton kayi
Auffenberg 1961
|
Gardner and DeMar 2013 | |||||||||
Amphibia
- Temnospondyli
- Scapherpetontidae
|
||||||||||
? Scapherpetodontidae indet.
|
Middleton and Dewar 2004 | |||||||||
rare, ? new genus | ||||||||||
= Scapherpetontidae indet.
Auffenberg and Goin 1959
|
Gardner and DeMar 2013 | |||||||||
Actinopteri
- Lepisosteiformes
- Lepisosteidae
|
||||||||||
Lepisosteidae indet.
Cuvier 1825
|
Middleton and Dewar 2004 | |||||||||
rare | ||||||||||
Actinopteri
|
||||||||||
Teleostei indet.
Müller 1846
|
Middleton and Dewar 2004 | |||||||||
rare | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Colorado | County: | Arapahoe |
Coordinates: | 39.7° North, 104.7° West (view map) | ||||
Paleocoordinates: | 45.9° North, 82.5° West | ||||
Basis of coordinate: | based on political unit | ||||
Geographic resolution: | small collection |
Time
Period: | Paleogene | Epoch: | Paleocene |
Stage: | Danian | 10 m.y. bin: | Cenozoic 1 |
*Period: | Early/Lower Tertiary | *Epoch: | Early/Lower Paleocene | *Local age/stage: | Puercan |
Key time interval: | Puercan | ||
Age range of interval: | 66.00000 - 63.30000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Denver | ||||
Regional section: | Denver Basin | Regional bed: | 4 | ||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: "about 145 m above" the base of the formation. |
Lithology and environment
Primary lithology: | brown,red,yellow argillaceous,silty "shale" |
Secondary lithology: | tuffaceous sandstone |
Lithology description: "interbedded reddish and yellowish brown shale, mudstone, siltstone, and tuffaceous sandstone" | |
Environment: | terrestrial indet. |
Geology comments: Per Middleton and Dewar (2004) this locality is essentially fill dirt turned up from a construction site. Source rocks are from "adjacent sediments that were predominantly fine-grained and thinly bedded. These beds probably represent overbank deposition, as the state of the specimens imply little fluvial transport (Middleton, 1983)." |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | bulk,surface (float),sieve,field collection |
Reason for describing collection: | taxonomic analysis |
Collection method comments: "mostly surface collected, however, some screenwashing". Middleton and Dewar (2004) report fossil wood. | |
Taxonomic list comments:? "Hemithlaeus" = Conacodon harbourae is from UCM loc. 78169
"Auraria urbana" (unpublished genus and species names) eight unpublished species listed by Middleton 1983 were finally published by Middleton and Dewar 2004 (see below) |
Metadata
Also known as: | UCM loc. 77267; UCM locality 77267 | ||
Database number: | 14658 | ||
Authorizer: | J. Alroy, P. Barrett, P. Holroyd | Enterer: | J. Alroy, T. Cleary, P. Holroyd |
Modifier: | P. Mannion | Research group: | vertebrate |
Created: | 1993-09-27 00:00:00 | Last modified: | 2021-08-18 05:33:19 |
Access level: | the public | Released: | 1993-09-27 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
2585. | M. D. Middleton. 1983. Early Paleocene vertebrates of the Denver Basin, Colorado. 1-404 [J. Alroy/J. Alroy/M. Uhen] |
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] | |
77694 | M. R. Atteberry and J. J. Eberle. 2021. New earliest Paleocene (Puercan) periptychid ‘condylarths’ from the Great Divide Basin, Wyoming, USA. Journal of Systematic Palaeontology [P. Mannion/P. Mannion] | |
1420 | J. J. Eberle and J. A. Lillegraven. 1998. A new important record of earliest Cenozoic mammalian history. Rocky Mountain Geology 33(1):49-117 [J. Alroy/J. Alroy/J. Alroy] | |
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] | |
19561 | M. D. Middleton and E. W. Dewar. 2004. New mammals from the early Paleocene Littleton fauna (Denver Formation, Colorado). In S. G. Lucas, K. E. Zeigler, P.E. Kondrashov (eds.), New Mexico Museum of Natural History and Science Bulletin 26:59-80 [P. Holroyd/P. Holroyd/M. Uhen] | |
31563 | ETE | R. L. Nydam and B. M. Fitzpatrick. 2009. The occurrence of Contogenys-like lizards in the Late Cretaceous and Early Tertiary of the Western Interior of the U.S.A. Journal of Vertebrate Paleontology 29(3):677-701 [M. Carrano/M. Carrano/P. Mannion] |
6996 | R. M. Sullivan and S. G. Lucas. 1996. Palaeoscincosaurus middletoni, new genus and species (Squamata: ?Scincidae) from the early Paleocene (Puercan) Denver Formation, Colorado. Journal of Vertebrate Paleontology 16(4):666-672 [J. Alroy/J. Alroy/J. Alroy] |