Elk Creek (390 m) (Eocene of the United States)

Also known as USGS D-2035 (Dorsey Quarry); YPM 80, 421; USNM D2035Q

Where: Big Horn County, Wyoming (44.5° N, 108.0° W: paleocoordinates 49.2° N, 90.8° W)

• coordinate based on political unit

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: D. M. Schankler. 1980. University of Michigan Papers on Paleontology 24 [J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15534: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• Dorsey Quarry placed at 397 m level by Bloch et al. 1998
Reptilia
 Squamata -
Anguimorpha "sp. 2"9 Fürbringer 1900 lizard
USNM 527822, 527874 (jaw fragments), 527961 (left dentary).
Entomophontes hutchisoni n. sp.10 Smith and Gauthier 2013 lizard
USNM 527961 (holotype), left dentary; Paratypes: USNM 527822 (jaw fragment), 527874 (jaw fragment).
Entomophontes incrustatus10 Smith and Gauthier 2013 lizard
USNM 527817 (right maxilla fragment), 527819 (jaw fragment), 527820 (right dentary fragment), 527821 (right dentary fragment; Text-fig. 13), 527866 (left maxilla fragment), 527871 (left dentary fragment), 527872 (jaw fragment).
 Squamata - Necrosauridae
Provaranosaurus sp.9 Gilmore 1942 lizard
USNM 527970 (right dentary fragment).
 Squamata -
cf. Saniwa sp.9 Leidy 1870 lizard
USNM 527911 (right maxilla fragment; Text-fig. 14A, B), 527912 (left dentary fragment; Text-fig. 14C), 527976 (left dentary fragment; Text-fig. 14D).
 Squamata - Anguidae
Gerrhonotinae indet.9 Cope 1864 lizard
USNM 527863 (jaw fragment), 527865 (jaw fragment; Text-fig. 8), 527867 (left maxilla fragment), 527873 (left dentary fragment).
Glyptosaurinae indet.9 Marsh 1872 lizard
USNM 527977 (right dentary fragment)
Glyptosaurus rhodinos n. sp.9 Smith 2011 lizard
USNM 527814 (holotype), partial parietal; Paratype: USNM 527978 (partial right maxilla)
Proxestops sp.9 Gauthier 1982 lizard
USNM 527868 (right dentary fragment; Text-fig. 9B, 10B), 527869 (posterior jaw fragment; Text-fig. 10A), 527917 (left frontal fragment; Text-fig. 9A), 527975 (partial left dentary).
 Squamata - Iguanidae
Paranolis delicatus n. gen. n. sp.9 Smith 2011 lizard
USNM 527969 (holotype), left dentary; Referred specimen: USNM 527944 (partial left jugal; Textfig. 5A). "This specimen is not in the syntype."
Suzanniwana sp.9 Smith 2009 lizard
USNM 527830 (jaw fragment), 527831 (maxilla fragment), ?527833 (jaw fragment), 527835 (fragment of articulated right dentary and splenial; Text-fig. 2H), 527837 (fragment of articulated right dentary and splenial; Text-fig. 2I), 527838 (partial left dentary; Text-fig. 2G), 527839 (partial left dentary), 527841, 527842 (left dentary fragments), 527845 (right dentary fragment; Text-fig. 2E), 527846 (left maxilla fragment), 527847 (right maxilla fragment; Text-fig. 2C), ?527848 (left dentary fragment), 527853, 527854 (jaw fragments), 527855 (left maxilla fragment), 527856 (right dentary fragment), ?527859, ?527860 (jaw fragments), 527877 (premaxilla fragment; Text-fig. 2A), 527967 (partial right dentary; Text-fig. 2D), 527974 (right maxilla; Text-fig. 2B), 527979 (partial left dentary; Text-fig. 2F).
Anolbanolis geminus n. sp.9 Smith 2011 lizard
USNM 527980 (holotype), partial right maxilla; Paratypes: USNM 527815 (partial left dentary; Text-fig. 4E), 527816 (left mandible fragment), 527828 (jaw fragment), ?527832 (left maxilla fragment), 527836 (portion of articulated right dentary and splenial; Text-fig. 4F), 527843 (jaw fragment), 527844 (right dentary fragment), 527849 (left dentary fragment), 527852 (jaw fragment), 527861, 527862 (left dentary fragments), 527870 (partial right dentary), 527941 (partial left postorbital; Text-fig. 4D), 527981 (partial right dentary), 527983 (partial right dentary). Referred specimens: 527876 (partial premaxilla; Text-fig. 4A), 527931 (partial left pterygoid; Text-fig. 4C).
 Squamata - Xantusiidae
Palaeoxantusia sp.9 Hecht 1956 night lizard
USNM 527883 (left dentary fragment), 527884, 527885 (left maxilla fragments), 527886 (right maxilla fragment), 527887 (left maxilla fragment), 527956 (partial right dentary), 527960 (left maxilla; Text-fig. 6A), 527965 (right dentary; Textfig. 6B).
 Squamata -
Scincoideus sp.9 Folie et al. 2005 lizard
USNM 527823 (right dentary fragment), 527824 (left maxilla fragment), 527825 (partial premaxilla; Text-fig. 7A), 527840 (left dentary fragment), 527889 (left maxilla fragment), ?527890 (left dentary fragment), 527891 (right dentary fragment), 527893 (right dentary fragment), 527894 (jaw fragment), 527895 (right dentary fragment), 527896, 527897 (right dentary fragment), 527898 (left dentary fragment), 527899 (right maxilla fragment; Text-fig. 7B), 527900 (left dentary fragment; Textfig. 7C), 527901–527905 (jaw fragments), 527906 (right maxilla fragment), 527907 (premaxilla fragment).
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
 Leptictida - Leptictidae
Prodiacodon tauricinerei Jepsen 1930 eutherian
 Primates - Omomyidae
Tetonius sp.3 Matthew 1915 tarsier
T. matthewi-ambiguus intergrade; Y-80
 Primates - Notharctidae
Cantius sp.1 Simons 1962 primate
 Primates - Paromomyidae
Phenacolemurinae indet.1 Simpson 1955 primate
 Primates - Picromomyidae
Picromomys petersonorum n. sp.8 Rose and Bown 1996 primate
from USGS D-2035, Big Horn Co.
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
 Lipotyphla - Geolabididae
Batodonoides vanhouteni2 Bloch et al. 1998 placental
USGS D-2035 DUPLICATE REF 1100 or 1101
 Creodonta - Oxyaenidae
Oxyaena forcipata6 Cope 1874 creodont
"O. intermedia/forcipata"
 Ferae - Viverravidae
Didymictis protenus7 Cope 1874 placental
YM-421; "D. curtidens/lysitensis"
Viverravus acutus7 Matthew and Granger 1915 placental
YM-421; "V. acutus/gracilis"
 Carnivora - Miacidae
Miacis petilus4 Gingerich 1983 carnivoran
 Carnivora -
Vulpavus australis Matthew and Granger 1915 carnivoran
described by Gingerich 1983a: YPM 421
 Taeniodonta - Stylinodontidae
Ectoganus gliriformis1 Cope 1874 taeniodont
 Tillodontia - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Ungulata - Diacodexeidae
Bunophorus grangeri11 Sinclair 1914 even-toed ungulate
Bunophorus robustus1 Sinclair 1914 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Copecion brachypternus1 Cope 1882 condylarth
Phenacodus sp.1 Cope 1873 condylarth
 Hyaenodonta -
Prolimnocyon atavus5 Matthew and Granger 1915 eutherian
YPM 421
 Hyaenodonta - Hyaenodontidae
"Prototomus viverrinus" = Sinopa viverrinus5 Cope 1874 eutherian
YPM 421; may = "P. sp. 1"
Prototomus robustus5 Matthew and Granger 1915 eutherian
YPM 421; may = "P. sp. 1"
Tritemnodon strenuus1 Cope 1875 eutherian
 Hyaenodonta -
Didelphodus absarokae Cope 1881 eutherian