Trochu (KUA-1): Lancian, Canada
collected by W. A. Clemens 1963-1967

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Temnospondyli - Albanerpetontidae
Albanerpetontidae indet. Fox and Naylor 1982
Gardner 2000 2 specimens
UALVP 40042, 40043
Mammalia - Multituberculata
Cimexomys priscus n. sp. Lillegraven 1969
recombined as Paracimexomys priscus
Mammalia - Multituberculata - Cimolomyidae
Cimolomys trochuus n. sp. Lillegraven 1969
Cimolomys gracilis Marsh 1889
Mammalia - Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma formosa (Marsh 1889)
Mesodma hensleighi n. sp. Lillegraven 1969
Mesodma thompsoni Clemens 1964
Mammalia
Nortedelphys magnus n. gen., n. sp. Case et al. 2004
Case et al. 2004
type was originally referred to Alphadon marshi
Alphadon jasoni Storer 1991
Fox and Naylor 1995
recombined as Nortedelphys jasoni
new specimen; includes many of the A. marshi specimens according to Johanson 1996b
Mammalia - Stagodontidae
Didelphodon coyi Fox and Naylor 1986
Fox and Naylor 2006
Mammalia - Alphadontidae
Alphadon marshi Simpson 1927
(108 + 153)
Alphadon wilsoni n. sp. Lillegraven 1969
Alphadon rhaister Clemens 1966
recombined as Turgidodon rhaister
Mammalia - Pediomyidae
Pediomys elegans Marsh 1889
Pediomys hatcheri (Osborn 1898)
original and current combination Protolambda hatcheri
Pediomys krejcii Clemens 1966
recombined as Leptalestes krejcii
Mammalia - Creodonta
Cimolestes magnus n. sp. Clemens and Russell 1965
recombined as Altacreodus magnus
UALVP 622 - type (incomplete left dentary containing p4, m1–3)
Mammalia - Gypsonictopidae
Gypsonictops illuminatus n. sp. Lillegraven 1969
Gypsonictops hypoconus Simpson 1927
Mammalia
Schowalteria clemensi n. gen., n. sp. Fox and Naylor 2003
Fox and Naylor 2003
(1 measurement)
Mammalia - Cimolestidae
Cimolestes propalaeoryctes n. sp. Lillegraven 1969
recombined as Scollardius propalaeoryctes
Batodon tenuis Marsh 1892
Cimolestes cerberoides n. sp. Lillegraven 1969
recombined as Ambilestes cerberoides
UALVP 2973 - type (incomplete left maxilla containing P3–4, M1–2)
Reptilia
Paraderma bogerti Estes 1964
Gao and Fox 1996 3 specimens
UALVP 29845 and several unnumbered (dentaries), 33385 (parietal), 33902-33910 (cervical/dorsal vertebrae)
Parasaniwa wyomingensis Gilmore 1928
Gao and Fox 1996 1 specimen
UALVP 33384 (maxilla)
Reptilia - Chamopsiidae
Haptosphenus placodon Estes 1964
Gao and Fox 1996 1 specimen
UALVP 33921 (partial mandible)
Stypodontosaurus melletes n. gen., n. sp. Gao and Fox 1996
Gao and Fox 1996 1 specimen
UALVP 29844 (holotype dentary)
Chamops segnis Marsh 1892
Gao and Fox 1996 1 specimen
partial maxilla, UALVP 29841
see common names

Geography
Country:Canada State/province:Alberta
Coordinates: 51.8° North, 113.0° West (view map)
Paleocoordinates:59.5° North, 84.6° 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:Scollard
Local section:Trochu Local bed:43 ft
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: layer "from less than 1 foot in thickness to about 3 feet"
all of the localities are within 27 m above the Kneehills Tuff, dated at "65-66" Ma according to Clemens et al. 1979 - this site is actually 43 ft above the tuff
Lithology and environment
Primary lithology: lithified claystone
Secondary lithology: siltstone
Lithology description: "a well-indurated clay and silt layer"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Disassociated major elements:many
Disassociated minor elements:many
Collection methods and comments
Collection methods:bulk,surface (float),surface (in situ),sieve,field collection
Collection size:818 specimens
Reason for describing collection:taxonomic analysis
Collectors:W. A. Clemens Collection dates:1963-1967
Collection method comments: because this quarry yielded a large majority of specimens, specimen counts assume that an absolute minimum number of listed specimens come from the other localities
NISP 818 (maximum)
Schowalteria specimen was found "in situ" but some parts of it were "recovered by carefully searching the outcrop and screen-washing the talus"
Taxonomic list comments:"Cimexomys sp." sensu stricto is said to be present at "Trochu" by Fox 1989, exact locality not stated
Fox 1988 lists "Deltatheriidae indet." and Fox 1974 "cf. Deltatheroides sp." from Trochu, exact locality is not given
Metadata
Also known as:Griffith Farm
Database number:14630
Authorizer:J. Alroy, R. Benson, M. Carrano Enterer:J. Alroy, R. Benson, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:1994-07-26 00:00:00 Last modified:2021-09-23 12:26:10
Access level:the public Released:1994-07-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
2229. J. A. Lillegraven. 1969. Latest Cretaceous mammals of upper part of Edmonton Formation of Alberta, Canada, and review of marsupial-placental dichotomy in mammalian evolution. University of Kansas Paleontological Contributions 50:1-122 [J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
31410 J. A. Case, F. J. Goin, and M. O. Woodburne. 2004. "South American" marsupials from the Late Cretaceous of North America and the origin of marsupial cohorts. Journal of Mammalian Evolution 11(3/4):223-255 [J. Alroy/J. Alroy/J. Alroy]
78157 D. A. Eberth. 2015. Origins of dinosaur bonebeds in the Cretaceous of Alberta, Canada. Canadian Journal of Earth Sciences 52(8):655-681 [M. Carrano/M. Carrano]
1541 R. C. Fox and B. G. Naylor. 1995. The relationships of the stagodontidae, primitive North American Late Cretaceous mammals. Sixth Symposium on Mesozoic Terrestrial Ecosystems and Biota, Short Papers 247-250:247-250 [J. Alroy/J. Alroy]
10173 R. C. Fox and B. G. Naylor. 2003. A Late Cretaceous taeniodont (Eutheria, Mammalia) from Alberta, Canada. Neues Jahrbuch für Geologie und Paläontologie 229(3):393-420 [J. Alroy/J. Alroy/J. Alroy]
24651 R. C. Fox and B. G. Naylor. 2006. Stagodontid marsupials from the Late Cretaceous of Canada and their systematic and functional implications. Acta Palaeontologica Polonica 51(1):13-36 [J. Alroy/J. Alroy]
37933 K. -Q. Gao and R. C. Fox. 1996. Taxonomy and evolution of Late Cretaceous lizards (Reptilia: Squamata) from western Canada. Bulletin of the Carnegie Museum of natural History 33:1-107 [R. Benson/R. Benson]
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]