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 50.9° N, 86.6° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Torrejonian (63.3 - 61.7 Ma)

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

Environment/lithology: terrestrial

Primary reference: K. D. Rose. 1981. The Clarkforkian Land-Mammal Age and Mammalian Faunal Composition Across the Paleocene-Eocene Boundary. University of Michigan Papers on Paleontology 26:1-197 [J. Alroy/J. Alroy/P. Mannion]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."
Osteichthyes
 Proteida - Batrachosauroididae
Opisthotriton kayi8 Auffenberg 1961 tetrapod
 Caudata - Urodela
Habrosaurus dilatus8 Gilmore 1928 siren
Scapherpeton tectum8 Cope 1876 salamander
Lisserpeton bairdi8 Estes 1965 salamander
Reptilia
 Testudines - Baenidae
Cedrobaena putorius10 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 silberlingii3
"Peltosaurus jepseni" = Proxestops silberlingii3 Gilmore 1938 lizard
 Choristodera -
Champsosaurus sp.2 Cope 1876 choristodere
Mammalia
 Cimolesta - Cimolestidae
Gelastops parcus Simpson 1935 eutherian
 Cimolesta - Palaeoryctidae
Palaeoryctidae indet. Winge 1917 eutherian
two new forms, "F" and "G"
 Cimolesta - Pentacodontidae
Aphronorus sp. Simpson 1935 eutherian
said to be new
Coriphagus cf. encinensis Matthew and Granger 1921 eutherian
 Leptictida - Leptictidae
Leptictidae indet. Gill 1872 eutherian
new leptictid
Myrmecoboides sp. Gidley 1915 eutherian
? Palaeictops sp. Matthew 1899 eutherian
 Primates - Plesiadapidae
Pronothodectes jepi n. sp. Gingerich 1975 primate
 Primates - Picrodontidae
Picrodus silberlingi Douglass 1908 primate
 Primates - Carpolestidae
Elphidotarsius cf. florencae Gidley 1923 primate
 Primates - Paromomyidae
Paromomys depressidens Gidley 1923 primate
confirmed by Gunnell 1989
Ignacius cf. fremontensis Gazin 1971 primate
 Primates - Palaechthonidae
Palenochtha minor Gidley 1923 primate
confirmed by Gunnell 1989
Premnoides douglassi6 Gunnell 1989 primate
"Plesiadapiform"
Plesiolestes problematicus n. sp. Jepsen 1930 primate
 Condylarthra - Hyopsodontidae
Litaletes ondolinde16 Van Valen 1978 condylarth
Promioclaenus acolytus1 Cope 1882 condylarth
 Condylarthra - Chriacidae
Prothryptacodon furens16 Simpson 1935 placental
 Tribosphenida - Periptychidae
Anisonchus sectorius Cope 1881 condylarth
 Amblypoda - Pantolambdidae
cf. Pantolambda cavirictum Cope 1883 pantodont
 Tribosphenida - Phenacodontidae
Tetraclaenodon puercensis Cope 1881 condylarth
 Tribosphenida - Nyctitheriidae
cf. Leptacodon munusculum Simpson 1935 placental
 Ferae - Viverravidae
Simpsonictis pegus n. sp.4 Gingerich and Winkler 1985 placental
Simpsonictis tenuis4 Simpson 1935 placental
Bryanictis microlestes4 Simpson 1935 placental
Protictis haydenianus Cope 1882 placental
 Macroscelidea - Apheliscidae
Haplaletes disceptatrix Simpson 1935 elephant shrew
Litomylus cf. dissentaneus Simpson 1935 elephant shrew
 Macroscelidea -
Adunator amplus n. sp.14 Secord 2008 elephant shrew
Adunator cf. ladae1 Simpson 1935 elephant shrew
 Eutheria -
Proteutheria indet. Romer 1966 eutherian
new forms "A," "B," "D" and "E"
 Taeniodonta - Conoryctidae
Huerfanodon polecatensis n. sp.12 Schoch and Lucas 1981 taeniodont
presumably includes "Conoryctes sp." of Rose
 Tribosphenida - Arctocyonidae
"Arctocyon montanensis" = Claenodon montanensis16, Arctocyon ferox11, Thryptacodon orthogonius13, "Mimotricentes subtrigonus" = Tricentes subtrigonus16, Chriacus katrinae16
"Arctocyon montanensis" = Claenodon montanensis16 Gidley 1919 condylarth
Arctocyon ferox11 Cope 1883 condylarth
Thryptacodon orthogonius13 Russell 1929 condylarth
"Mimotricentes subtrigonus" = Tricentes subtrigonus16 Cope 1881 condylarth
Chriacus katrinae16 Van Valen 1978 condylarth
 Acreodi - Triisodontidae
Goniacodon levisanus n. sp. Cope 1883 eutherian
 Acreodi - Mesonychidae
Dissacus navajovius16 Cope 1881 condylarth
 Acreodi -
Microclaenodon assurgens16 Cope 1884 eutherian
 Insectivora -
Insectivora indet.1 insectivoran
 Sarcobora - Mixodectidae
Eudaemonema cuspidata Simpson 1935 insectivoran
 Sarcobora - Apatemyidae
Unuchinia diaphanes n. sp.5 Gunnell 1988 insectivoran
Jepsenella praepropera Simpson 1940 insectivoran
described by West 1973a
 Multituberculata - Eucosmodontidae
Stygimys sp. Sloan and Van Valen 1965 multituberculate
 Multituberculata - Neoplagiaulacidae
Neoplagiaulacidae indet. Ameghino 1890 multituberculate
two new forms, "1" and "2"
Ectypodus aphronorus15 Sloan 1987 multituberculate
Mesodma pygmaea7 Sloan 1987 multituberculate
not listed in Sloan 1987
cf. Mimetodon silberlingi Simpson 1935 multituberculate
 Multituberculata - Ptilodontidae
Baiotomeus douglassi9 Simpson 1935 multituberculate
Ptilodus wyomingensis n. sp. Jepsen 1940 multituberculate
see Jepsen 1940
 Multituberculata - Cimolodontidae
Anconodon cochranensis Russell 1929 multituberculate
sen. syn. of A. russelli: Sloan 1987
Anconodon gidleyi Simpson 1935 multituberculate
 Multituberculata - Taeniolabididae
Catopsalis sp. Cope 1882 multituberculate