Trochu (KUA-1) (Cretaceous of Canada)

Also known as Griffith Farm

Where: Alberta, Canada (51.8° N, 113.0° W: paleocoordinates 59.5° N, 84.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Scollard Formation, Lancian (70.6 - 66.0 Ma)

• 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

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified claystone and siltstone

• "a well-indurated clay and silt layer"

Size class: mesofossils

Collected by W. A. Clemens in 1963-1967

Collection methods: bulk, surface (float), surface (in situ), sieve,

• 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"

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14630: authorized by John Alroy, entered by John Alroy on 26.07.1994, edited by Matthew Carrano and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

• "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

Mammalia
 Theriamorpha - Stagodontidae
Didelphodon coyi4 Fox and Naylor 1986 metatherian
 Theriamorpha - Pediomyidae
Pediomys elegans, "Pediomys krejcii" = Leptalestes krejcii, "Pediomys hatcheri" = Protolambda hatcheri
Pediomys elegans Marsh 1889 metatherian
"Pediomys krejcii" = Leptalestes krejcii Clemens 1966 metatherian
"Pediomys hatcheri" = Protolambda hatcheri Osborn 1898 metatherian
 Theriamorpha - Herpetotheriidae
"Alphadon jasoni" = Nortedelphys jasoni2, Nortedelphys magnus n. gen. n. sp.1
"Alphadon jasoni" = Nortedelphys jasoni2 Storer 1991 marsupial
new specimen; includes many of the A. marshi specimens according to Johanson 1996b
Nortedelphys magnus n. gen. n. sp.1 Case et al. 2004 marsupial
type was originally referred to Alphadon marshi
 Theriamorpha - Alphadontidae
Alphadon wilsoni n. sp., Alphadon marshi, "Alphadon rhaister" = Turgidodon rhaister
Alphadon wilsoni n. sp. Lillegraven 1969 metatherian
Alphadon marshi Simpson 1927 metatherian
(108 + 153)
"Alphadon rhaister" = Turgidodon rhaister Clemens 1966 metatherian
 Creodonta -
"Cimolestes magnus n. sp." = Altacreodus magnus
"Cimolestes magnus n. sp." = Altacreodus magnus Clemens and Russell 1965 creodont
UALVP 622 - type (incomplete left dentary containing p4, m1–3)
 Cimolesta - Cimolestidae
"Cimolestes cerberoides n. sp." = Ambilestes cerberoides, Batodon tenuis, "Cimolestes propalaeoryctes n. sp." = Scollardius propalaeoryctes
"Cimolestes cerberoides n. sp." = Ambilestes cerberoides Lillegraven 1969 eutherian
UALVP 2973 - type (incomplete left maxilla containing P3–4, M1–2)
Batodon tenuis Marsh 1892 eutherian
"Cimolestes propalaeoryctes n. sp." = Scollardius propalaeoryctes Lillegraven 1969 eutherian
 Theriamorpha - Gypsonictopidae
Gypsonictops illuminatus n. sp. Lillegraven 1969 eutherian
Gypsonictops hypoconus Simpson 1927 eutherian
 Theriamorpha - Stylinodontidae
Schowalteria clemensi n. gen. n. sp.3
Schowalteria clemensi n. gen. n. sp.3 Fox and Naylor 2003 taeniodont
 Multituberculata - Neoplagiaulacidae
Mesodma thompsoni Clemens 1964 multituberculate
Mesodma hensleighi n. sp. Lillegraven 1969 multituberculate
Mesodma formosa Marsh 1889 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate
 Multituberculata -
"Cimexomys priscus n. sp." = Paracimexomys priscus
"Cimexomys priscus n. sp." = Paracimexomys priscus Lillegraven 1969 multituberculate
 Multituberculata - Cimolomyidae
Cimolomys gracilis Marsh 1889 multituberculate
Cimolomys trochuus n. sp. Lillegraven 1969 multituberculate
Reptilia
 Squamata -
Paraderma bogerti5 Estes 1964 squamates
UALVP 29845 and several unnumbered (dentaries), 33385 (parietal), 33902-33910 (cervical/dorsal vertebrae)
Parasaniwa wyomingensis5 Gilmore 1928 squamates
UALVP 33384 (maxilla)
 Squamata - Chamopsiidae
Haptosphenus placodon5 Estes 1964 squamates
UALVP 33921 (partial mandible)
Stypodontosaurus melletes n. gen. n. sp.5 Gao and Fox 1996 squamates
UALVP 29844 (holotype dentary)
Chamops segnis5 Marsh 1892 squamates
partial maxilla, UALVP 29841
Amphibia
 Temnospondyli - Albanerpetontidae
Albanerpetontidae indet.6 Fox and Naylor 1982 tetrapod
UALVP 40042, 40043