Rock Bench Quarry (Paleocene of the United States)

Also known as Locality No. 6

Where: Park County, Wyoming (44.3° N, 109.0° W: paleocoordinates 50.8° N, 86.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Torrejonian (63.8 - 60.9 Ma)

• in a stratigraphically isolated reversed polarity zone interpreted as chron 27r: Butler et al. 1987

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collection methods: surface (in situ),

Primary reference: C. W. Gilmore. 1942. Paleocene faunas of the Polecat Bench Formation, Park County, Wyoming Part II. Lizards. Proceedings of the American Philosophical Society 85(2):159-167 [J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 14912: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Roger Benson and K. Christopher Beard

Creative Commons license: CC BY (attribution)

Taxonomic list

• >I have used Van Valen's 1978 list of condylarths because Rose gives no reason for ignoring it
meter level follows Butler et al. 1981
above two records presumably include "Tricentes cf. punitor" and "cf. Chriacus sp."
Reptilia
 Choristodera -
Champsosaurus sp.2 Cope 1876 choristodere
 Testudinata - Baenidae
Cedrobaena putorius9 Gaffney 1972 turtle
YPM PU 16837, the right 1/3 of a skull; YPM PU 18011, posterior portion of parietals
 Squamata - Anguidae
"Peltosaurus jepseni" = Proxestops silberlingii
"Peltosaurus jepseni" = Proxestops silberlingii Gilmore 1938 squamates
Mammalia
 Multituberculata - Taeniolabididae
Catopsalis sp.11 Cope 1882 multituberculate
 Multituberculata - Eucosmodontidae
Stygimys sp.11 Sloan and Van Valen 1965 multituberculate
 Multituberculata - Cimolodontidae
Anconodon cochranensis11 Russell 1929 multituberculate
sen. syn. of A. russelli: Sloan 1987
Anconodon gidleyi11 Simpson 1935 multituberculate
 Multituberculata - Ptilodontidae
Ptilodus wyomingensis n. sp.11 Jepsen 1940 multituberculate
see Jepsen 1940
Baiotomeus douglassi8 Simpson 1935 multituberculate
 Multituberculata - Neoplagiaulacidae
Neoplagiaulacidae indet.11 Ameghino 1890 multituberculate
two new forms, "1" and "2"
cf. Mimetodon silberlingi11 Simpson 1935 multituberculate
Mesodma pygmaea6 Sloan 1987 multituberculate
not listed in Sloan 1987
Ectypodus aphronorus14 Sloan 1987 multituberculate
 Taeniodonta - Conoryctidae
Huerfanodon polecatensis n. sp.12 Schoch and Lucas 1981 taeniodont
presumably includes "Conoryctes sp." of Rose
 Condylarthra - Hyopsodontidae
Promioclaenus acolytus1 Cope 1882 condylarth
Litaletes ondolinde15 Van Valen 1978 condylarth
 Insectivora -
Insectivora indet.1 Bowdich 1821 insectivoran
 Tribosphenida - Mixodectidae
Eudaemonema cuspidata11 Simpson 1935 placental
 Primates - Plesiadapidae
Pronothodectes jepi n. sp.11 Gingerich 1975 primate
 Primates - Picrodontidae
Picrodus silberlingi11 Douglass 1908 primate
 Primates - Carpolestidae
Elphidotarsius cf. florencae11 Gidley 1923 primate
 Primates - Paromomyidae
Ignacius cf. fremontensis11 Gazin 1971 primate
Paromomys depressidens11 Gidley 1923 primate
confirmed by Gunnell 1989
 Primates - Palaechthonidae
Plesiolestes problematicus n. sp.11 Jepsen 1930 primate
Premnoides douglassi5 Gunnell 1989 primate
"Plesiadapiform"
Palenochtha minor11 Gidley 1923 primate
confirmed by Gunnell 1989
 Tribosphenida - Periptychidae
Anisonchus sectorius11 Cope 1881 condylarth
 Ferae - Viverravidae
Simpsonictis pegus n. sp.3 Gingerich and Winkler 1985 placental
Simpsonictis tenuis3 Simpson 1935 placental
Bryanictis microlestes3 Simpson 1935 placental
Protictis haydenianus11 Cope 1882 placental
 Procreodi - Arctocyonidae
Arctocyon ferox10, "Arctocyon montanensis" = Arctocyon corrugatus15, Chriacus katrinae15, "Mimotricentes subtrigonus" = Tricentes subtrigonus15, "Chriacus orthogonius" = Thryptacodon orthogonius15, Microclaenodon assurgens15
Arctocyon ferox10 Cope 1883 condylarth
"Arctocyon montanensis" = Arctocyon corrugatus15 Cope 1883 condylarth
Chriacus katrinae15 Van Valen 1978 condylarth
"Mimotricentes subtrigonus" = Tricentes subtrigonus15 Cope 1881 condylarth
"Chriacus orthogonius" = Thryptacodon orthogonius15 Russell 1929 condylarth
Microclaenodon assurgens15 Cope 1884 condylarth
 Tribosphenida - Phenacodontidae
Tetraclaenodon puercensis11 Cope 1881 condylarth
 Acreodi - Mesonychidae
Dissacus navajovius15 Cope 1881 condylarth
 Acreodi - Triisodontidae
Goniacodon levisanus n. sp.11 Cope 1883 placental
 Acreodi - Oxyclaenidae
Prothryptacodon furens15 Simpson 1935 placental
Coriphagus cf. encinensis11 Matthew and Granger 1921 placental
 Soricomorpha - Nyctitheriidae
cf. Leptacodon munusculum11 Simpson 1935 placental
 Macroscelidea -
Adunator amplus n. sp.13 Secord 2008 elephant shrew
Adunator cf. ladae1 Simpson 1935 elephant shrew
 Macroscelidea - Apheliscidae
Litomylus cf. dissentaneus11 Simpson 1935 elephant shrew
Haplaletes disceptatrix11 Simpson 1935 elephant shrew
 Leptictida - Leptictidae
Leptictidae indet.11 Gill 1872 eutherian
new leptictid
? Palaeictops sp.11 Matthew 1899 eutherian
Myrmecoboides sp.11 Gidley 1915 eutherian
 Cimolesta - Apatemyidae
Jepsenella praepropera11 Simpson 1940 eutherian
described by West 1973a
Unuchinia diaphanes n. sp.4 Gunnell 1988 eutherian
 Cimolesta - Pentacodontidae
Aphronorus sp.11 Simpson 1935 eutherian
said to be new
 Cimolesta - Cimolestidae
Gelastops parcus11 Simpson 1935 eutherian
 Cimolesta - Pantolambdidae
cf. Pantolambda cavirictum11 Cope 1883 pantodont
 Eutheria -
Proteutheria indet.11 Romer 1966 eutherian
new forms "A," "B," "D" and "E"
 Proteutheria - Palaeoryctidae
Palaeoryctidae indet.11 Winge 1917 eutherian
two new forms, "F" and "G"
Amphibia
 Caudata - Urodela
Habrosaurus dilatus7 Gilmore 1928 siren
Lisserpeton bairdi7 Estes 1965 salamander
Scapherpeton tectum7 Cope 1876 salamander
 Proteida - Batrachosauroididae
Opisthotriton kayi7 Auffenberg 1961 salamander