Swift Current Creek (Eocene of Canada)

Where: Saskatchewan, Canada (50.2° N, 107.6° W: paleocoordinates 52.8° N, 94.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cypress Hills Formation, Late/Upper Uintan (46.2 - 40.4 Ma)

• locality occurs "in the upper beds" of a 15 m section

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; sandstone and conglomerate

• environment of formation was "braided streams"
• "unconsolidated lens" in a formation of "sands, gravels, and conglomerates and sandstones with calcareous cement"

Size classes: macrofossils, mesofossils

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

Primary reference: J. E. Storer. 1984. Mammals of the Swift Current Creek Local Fauna (Eocene: Uintan), Saskatchewan. Natural History Contributions, Museum of Natural History, Regina 7:1-158 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 16626: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• includes a single quarry

•reported NISP of 1120, but 125 are of generically indeterminate taxa, for a total of 995

•type of "Trigenicus" mammifer mentioned by Frick 1937 and Scott 1940 probably from Calf Creek or another Chadronian locality

Reptilia
 Testudinata - Baenidae
cf. Baena sp.5 Leidy 1870 turtle
 Testudines -
Testudines indet.5 Batsch 1788 turtle
 Testudines - Testudinidae
Testudinidae indet.5 Batsch 1788 turtle
 Testudines - Emydidae
Emydidae indet.5 Rafinesque 1815 turtle
 Testudines - Carettochelyidae
cf. Pseudanosteira sp.5 Clark 1932 turtle
 Testudines - Trionychidae
cf. Apalone sp.5 Rafinesque 1832 softshell turtle
Mammalia
 Theriamorpha - Leptictidae
Leptictidae indet.1 Gill 1872 eutherian
Palaeictops borealis Russell 1965 eutherian
 Cimolesta - Apatemyidae
Apatemys hendryi Robinson 1966 eutherian
 Insectivora -
Insectivora indet. Bowdich 1821 insectivoran
 Condylarthra - Hyopsodontidae
Hyopsodus fastigatus n. sp.4 Russell and Wickenden 1933 condylarth
described by Russell and Wickenden 1933
 Placentalia -
Chiroptera "indet. sp. 1" Blumenbach 1779 bat
Chiroptera "indet. sp. 2" Blumenbach 1779 bat
 Chiroptera - Molossidae
Wallia scalopidens Storer 1984 free-tailed bat
originally said to be a bat, but assigned to the Proscalopidae by Storer 1996
 Creodonta -
Didelphodus serus Storer 1984 creodont
 Carnivora -
Caniformia "indet. sp. 1" Kretzoi 1943 carnivoran
possibly includes Hesperocyon
Caniformia "indet. sp. 1" Kretzoi 1943 carnivoran
 Carnivora - Canidae
Hesperocyon sp.2 Scott 1890 canid
 Carnivora - Miacidae
Miocyon sp.3 Matthew 1909 carnivoran
 Acreodi - Mesonychidae
Harpagolestes sp. Wortman 1901 condylarth
 Perissodactyla - Equidae
Epihippus cf. gracilis Marsh 1871 horse
 Perissodactyla - Tapiridae
Colodon cf. kayi Hough 1955 tapir
Dilophodon sp. Scott 1883 tapir
 Perissodactyla - Brontotheriidae
Brontotheriidae indet. Marsh 1873 brontothere
 Artiodactyla - Oromerycidae
Oromerycidae indet. Gazin 1955 even-toed ungulate
 Artiodactyla - Protoceratidae
Leptoreodon marshi Wortman 1898 protoceratid
 Artiodactyla - Agriochoeridae
Protoreodon pumilus Marsh 1875 agriochoerid
 Artiodactyla - Homacodontidae
Auxontodon processus Storer 1984 even-toed ungulate
Mytonomeryx scotti Gazin 1955 even-toed ungulate
 Artiodactyla - Leptochoeridae
Ibarus ignotus Storer 1984 even-toed ungulate
 Theriamorpha - Sespedectidae
Sespedectes sp.7 Stock 1935 placental
 Theriamorpha - Soricidae
Soricidae indet. Fischer 1814 shrew
"sp. A"
Domnina sp. Cope 1873 shrew
 Theriamorpha - Geolabididae
Centetodon aztecus Lillegraven et al. 1981 placental
 Theriamorpha - Oligoryctidae
Oligoryctes sp. Hough 1956 placental
 Theriamorpha - Nyctitheriidae
Nyctitherium sp. Marsh 1872 placental
 Theriamorpha - Erinaceidae
Erinaceidae indet. Fischer von Waldheim 1817 hedgehog
 Rodentia - Aplodontidae
Prosciurinae indet. Wilson 1949 mountain beaver
 Rodentia - Ischyromyidae
Pseudotomus cf. eugenei Burke 1935 rodent
"Anonymus sp." = Churcheria7 Storer 2002 rodent
Leptotomus sp. Matthew 1910 rodent
Leptotomus guildayi Black 1971 rodent
Microparamys dubius Wood 1949 rodent
Microparamys solidus Storer 1984 rodent
 Rodentia - Eutypomyidae
Janimus mirus Storer 1984 rodent
 Rodentia - Eomyidae
Metanoiamys fugitivus1 Storer 1984 rodent
Protadjidaumo altilophus Storer 1984 rodent
 Rodentia - Cylindrodontidae
 Lagomorpha - Leporidae
Leporidae indet., "Procaprolagus vusillus" = Desmatolagus vusillus
Leporidae indet. Fischer de Waldheim 1817 rabbit
"Procaprolagus vusillus" = Desmatolagus vusillus Storer 1984 rabbit
 Theriamorpha - Plagiomenidae
Thylacaelurus campester Storer 1984 placental
 Primates - Omomyidae
Omomyidae indet. Gazin 1958 tarsier
"sp. 2"
Saskomomys lindsayorum n. sp.6 Perry et al. 2023 tarsier
presumably "sp. 1" of Storer 1984
Trogolemur storeri n. sp.6 Perry et al. 2023 tarsier
Walshina mcgrewi6 Robinson 1968 tarsier
 Theriamorpha - Peradectidae
Peradectes californicus, "Nanodelphys cf. hunti" = Nanodelphys huntii1
Peradectes californicus Stock 1936 marsupial
"Nanodelphys cf. hunti" = Nanodelphys huntii1 Cope 1873 marsupial
 Theriamorpha - Herpetotheriidae
"Copedelphys innominata" = Herpetotherium innominatum1 Simpson 1928 marsupial
Herpetotherium marsupium1 Troxell 1923 marsupial
Herpetotherium knighti1 McGrew et al. 1959 marsupial
 Multituberculata - Neoplagiaulacidae
Ectypodus lovei Sloan 1966 multituberculate