Shotgun (Paleocene of the United States)

Also known as UW V-60014, V-60016; Keefer Hill; Twin Buttes; Jenkins Mountain; New Anthill

Where: Fremont County, Wyoming (43.5° N, 109.2° W: paleocoordinates 49.4° N, 89.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Shotgun Member (Fort Union Formation), Tiffanian (61.7 - 56.8 Ma)

Environment/lithology: terrestrial

Primary reference: G. F. Gunnell. 1989. Evolutionary History of Microsyopoidea (Mammalia, ?Primates) and the Relationship Between Plesiadapiformes and Primates. University of Michigan Papers on Paleontology 27:1-157 [J. Alroy/J. Alroy/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15067: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is NOT West Side of Shotgun Butte (see), which is the uppermost of three fossiliferous horizons; the fauna of the lowest horizon is not discussed by Gunnell

•apart from the plesiadapiforms, Gunnell's list is mostly repeated from ancient sources without modification

•Gunnell lists Eudaemonema cuspidata from "Shotgun fauna, Keefer Hill" but omits this from his faunal list

 Multituberculata - Taeniolabididae
Catopsalis calgariensis5 Russell 1926 multituberculate
Gunnell lists C. cf. fissidens; record of C. cf. fissidens in Keefer 1961 explicitly referred to C. calgariensis by Middleton
 Multituberculata - Cimolodontidae
"Anconodon lewisi n. sp." = Anconodon cochranensis7
"Anconodon lewisi n. sp." = Anconodon cochranensis7 Russell 1929 multituberculate
 Multituberculata - Ptilodontidae
Ptilodus sp. Cope 1881 multituberculate
given as "P. cf. montanus" by Keefer and Troyer 1964
 Multituberculata - Neoplagiaulacidae
Neoplagiaulax nelsoni7 Sloan 1987 multituberculate
Mimetodon cf. silberlingi Simpson 1935 multituberculate
Mesodma pygmaea7 Sloan 1987 multituberculate
Ectypodus aphronorus7 Sloan 1987 multituberculate
Gunnell lists "E. sp."
Parectypodus sylviae7 Rigby 1980 multituberculate
Parectypodus sinclairi7 Simpson 1935 multituberculate
 Condylarthra - Hyopsodontidae
Promioclaenus sp. Trouessart 1904 condylarth
 Insectivora -
Insectivora indet.1 Bowdich 1821 insectivoran
 Primates - Plesiadapidae
Nannodectes intermedius n. sp. Gazin 1971 primate
Plesiadapis sp. Gervais 1877 primate
resembles P. praecursor; assigned to that species by Gingerich 1976 and Krause and Gingerich 1983
 Primates - Picrodontidae
Picrodus canpacius6 Scott and Fox 2005 primate
described by McGrew and Patterson 1962
 Primates - Carpolestidae
Elphidotarsius shotgunensis Gazin 1971 primate
Carpodaptes cf. hazelae Simpson 1936 primate
 Primates - Paromomyidae
Ignacius cf. frugivorus Matthew and Granger 1921 primate
Ignacius fremontensis Gazin 1971 primate
Paromomys cf. depressidens Gidley 1923 primate
 Primates - Palaechthonidae
Torrejonia sirokyi Szalay 1973 primate
Plesiolestes cf. problematicus Jepsen 1930 primate
Palenochtha cf. minor Gidley 1923 primate
 Primates -
Palaechthon woodi Gazin 1971 primate
Palaechthon cf. alticuspis Gidley 1923 primate
 Dermoptera -
Elpidophorus cf. minor Simpson 1937 colugo
 Tribosphenida - Periptychidae
Anisonchus cf. sectorius Cope 1881 condylarth
Periptychus cf. carinidens1 Cope 1881 condylarth
 Ferae - Viverravidae
cf. Simpsonictis sp.4 MacIntyre 1962 placental
Bryanictis microlestes2 Simpson 1935 placental
 Procreodi - Arctocyonidae
Arctocyon cf. ferox1, Colpoclaenus keeferi n. sp., "Mimotricentes subtrigonus" = Tricentes subtrigonus1
Arctocyon cf. ferox1 Cope 1883 condylarth
Colpoclaenus keeferi n. sp. Patterson and McGrew 1962 condylarth
see Patterson and McGrew 1962
"Mimotricentes subtrigonus" = Tricentes subtrigonus1 Cope 1881 condylarth
 Tribosphenida - Phenacodontidae
Ectocion sp. Cope 1882 condylarth
ominously not mentioned by Thewissen 1990, but Keefer and Troyer 1964 list "Gidleyina sp."
Phenacodus matthewi8 Simpson 1935 condylarth
from Tiffanian of "Keefer Hill"
 Tribosphenida - Pantolestoidae
Pentacodon sp. Scott 1892 placental
 Macroscelidea - Apheliscidae
cf. Litomylus sp. Simpson 1935 elephant shrew
 Cimolesta - Pentacodontidae
Aphronorus orieli3 Gazin 1969 eutherian
Gunnell lists "cf. Aphronorus sp." and once again is merely repeating an old i.d.
Aphronorus fraudator3 Simpson 1935 eutherian
 Cimolesta - Cimolestidae
Gelastops sp. Simpson 1935 eutherian
 Cimolesta - Pantolambdidae
Pantolambda cf. cavirictum Cope 1883 pantodont
 Tribosphenida - Peradectidae
cf. Peradectes sp. Matthew and Granger 1921 marsupial