Long Fall Horizon: Lancian, Canada
collected by R. Fox
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Cimolestidae
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Cimolestes cf. stirtoni
Clemens 1973
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Cimolestes cf. cerberoides
Lillegraven 1969
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| recombined as Ambilestes cerberoides | ||||||||||
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Mammalia
- Gypsonictopidae
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Gypsonictops illuminatus
Lillegraven 1969
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Mammalia
- Pediomyidae
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Pediomys elegans
Marsh 1889
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Mammalia
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Alphadon sp.
Simpson 1927
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= Alphadon jasoni
Storer 1991
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Johanson 1996 | |||||||||
| recombined as Nortedelphys jasoni | ||||||||||
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Mammalia
- Multituberculata
- Cimolomyidae
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Cimolomys cf. gracilis
Marsh 1889
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Meniscoessus cf. robustus
(Marsh 1889)
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Mammalia
- Multituberculata
- Cimolodontidae
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Cimolodon nitidus
Marsh 1889
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Reptilia
- Testudines
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Judithemys russelli n. sp.
Brinkman 2015
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Brinkman 2015 | 1 individual | ||||||||
| recombined as Osteopygis russelli | ||||||||||
| UALVP 47598, articulated shell and pelvis. Carapace missing left peripherals six to nine and right peripherals five to seven. Plastron missing epiplastra and entoplastron. Pelvis visible in left lateral view. | ||||||||||
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Amphibia
- Temnospondyli
- Urodela
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Urodela indet.
(Duméril 1805)
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Gardner and DeMar 2013 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Saskatchewan |
| Coordinates: | 49.5° North, 109.2° West (view map) | ||
| Paleocoordinates: | 56.6° North, 81.6° 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 | *Epoch: | Senonian |
| Key time interval: | Lancian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Frenchman | ||||
| Local section: | Cypress Hills | Local bed: | 2 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Thought to be reworked by some, but fresh exposures confirm separation of upper and lower horizons
Might be Frenchman Formation, instead of Ravenscrag (Redman et al. 2015) | |||||
Lithology and environment
| Primary lithology: | claystone |
| Secondary lithology: | ferruginous conglomerate |
| Includes fossils? | Y |
| Lithology description: "fossiliferous clay/ironstone conglomerate" | |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | mesofossils |
| Preservation of anatomical detail: | good |
| Fragmentation: | occasional |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | bulk,selective quarrying,sieve,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collectors: | R. Fox |
| Taxonomic list comments:directly underlies Rav W-1 Horizon (Puercan) Fox argues that the fauna is Cretaceous, and much of it seems to be, but insofar as it is deposited at the base of a strongly crossbedded sandstone, I believe it is mixed in the same way as the Montana localities described by Lofgren 1995; I have used Lofgren's scheme for sorting out Cretaceous and Paleocene lists Mesodma thompsoni could be either Cretaceous or Paleocene and therefore is not placed supersedes Johnston and Fox 1984 and Fox 1990. BUT Fox 1997 claims there is no reworking, and that the horizons are legitimately distinct, and that there are Cretaceous "condylarths" elsewhere in SK. | |
Metadata
| Also known as: | Medicine Hat Brick and Tile Quarry (MHBT Quarry), in part | ||
| Database number: | 14584 | ||
| Authorizer: | J. Alroy, P. Holroyd, E. Vlachos | Enterer: | J. Alroy, P. Holroyd, E. Vlachos |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 1997-04-12 00:00:00 | Last modified: | 2023-05-31 15:27:39 |
| Access level: | the public | Released: | 1997-04-12 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 1535. | R. C. Fox. 1989. The Wounded Knee local fauna and mammalian evolution near the Cretaceous-Tertiary boundary, Saskatchewan, Canada. Palaeontographica Abteilung A 208(1-3):11-59 [J. Alroy/J. Alroy/M. Carrano] |
Secondary references:
| 82443 | D. B. Brinkman. 2015. Judithemys russelli sp. nov., a new “macrobaenid” turtle from the Late Cretaceous of Saskatchewan, Canada. In O. R. P. Bininda-Emonds, G. L. Powell, H. A. Jamniczky, A. M. Bauer, J. Theodor (eds.), All Animals are Interesting: A Festschrift in Honour of Anthony P. Russell 107-119 [E. Vlachos/E. Vlachos] | |
| 41188 | R. C. Fox. 1997. Late Cretaceous and Paleocene mammals, Cypress Hills region, Saskatchewan, and mammalian evolution across the Cretaceous–Tertiary boundary. In L. McKenzie-McAnally (ed.), Canadian Paleontology Conference VII, Saskatoon. Field Trip Guidebook No. 6: Upper Cretaceous and Tertiary Stratigraphy and Paleontology of Southern Saskatchewan. Geological Association of Canada 70-85 [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] | |
| 82442 | A. D. Gentry, C. R. Kiernan, and J. F. Parham. 2023. A large non-marine turtle from the Upper Cretaceous of Alabama and a review of North American “macrobaenids”. The Anatomical Record 306(6):1411-1430 [E. Vlachos/E. Vlachos/M. Carrano] | |
| 2036 | Z. Johanson. 1996. Revision of the Late Cretaceous North American marsupial genus Alphadon. Palaeontographica Abteilung A 242:127-184 [J. Alroy/J. Alroy/M. Uhen] |