PBDB Collection

Gidley Quarry: Torrejonian, Montana

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Amphibia - Temnospondyli - Urodela

	cf. Scapherpeton tectum Cope 1876	Sullivan 1991

	Habrosaurus dilatus Gilmore 1928	Sullivan 1991
Amphibia - Temnospondyli - Batrachosauroididae

	Opisthotriton gidleyi n. sp. Sullivan 1991	Sullivan 1991	1 specimen
	AMNH 2667 (holotype), incomplete skull

	Opisthotriton kayi Auffenberg 1961	Sullivan 1991
Reptilia

	Varanoidea indet. Gray 1827	Sullivan 1991
Reptilia - Anguidae

	cf. Proxestops silberlingi	Sullivan 1991

	Proxestops silberlingii (Gilmore 1938)	Sullivan 1991

	Machaerosaurus torrejonensis Gilmore 1928	Sullivan 1991
Reptilia - Xantusiidae

	Palaeoxantusia fera Hecht 1956	Sullivan 1991
Mammalia - Leptictidae

	Prodiacodon furor n. sp. Novacek 1977
	described by Novacek 1977

	Prodiacodon concordiarcensis n. sp. Simpson 1935

	Myrmecoboides montanensis n. sp. Gidley 1915
Mammalia - Conoryctidae

	Conoryctes comma Cope 1881
	= Conoryctidae indet. Wortman 1896	Alroy 2002
	form "B" according to Schoch 1986
Mammalia - Condylarthra - Hyopsodontidae

	Litaletes disjunctus n. sp. Simpson 1935

	Promioclaenus aquilonius n. sp. (Simpson 1935)
	= Promioclaenus acolytus Cope 1882	Alroy 2002
	see Simpson 1935d
Mammalia - Periptychidae

	Anisonchus sectorius (Cope 1881)
Mammalia - Acreodi - Oxyclaenidae

	Coriphagus montanus Douglass 1908

	Prothryptacodon furens n. sp. Simpson 1935
	(1 measurement)
Mammalia - Acreodi - Mesonychidae

	Dissacus sp. Cope 1881
Mammalia - Carnivora

	Ictidopappus mustelinus n. sp. Simpson 1935
	(5 measurements)
Mammalia - Viverravidae

	Bryanictis vanvaleni (MacIntyre 1966)
	= Intyrictis vanvaleni MacIntyre 1966	Rigby 1980
	not clear why Rose omits this

	Protictis tenuis n. sp. (Simpson 1935)
	(1 measurement)
	= Simpsonictis tenuis Simpson 1935	Alroy 2002

	Protictis haydenianus (Cope 1882)

	Protictis microlestes n. sp. (Simpson 1935)
	(6 measurements)
	= Bryanictis microlestes Simpson 1935	Alroy 2002
Mammalia - Procreodi - Arctocyonidae

	Arctocyon ferox (Cope 1883)	Rigby 1980
	= Arctocyon corrugatus Cope 1883	Kondrashov and Lucas 2004
	A. corrugatus referred from this locality, no mention of A. ferox, so presumed to be a reidentification

	Neoclaenodon montanensis n. gen., n. sp. Gidley 1919	Gidley 1919
	also includes his types of "Neoclaenodon silberlingi" and "N. latidens" (4 measurements)
	= Claenodon montanensis Gidley 1919	Rose 1981
	= Arctocyon montanensis Gidley 1919	Alroy 2002

	Tricentes punitor n. sp. (Simpson 1935)
	= Chriacus punitor Simpson 1935	Alroy 2002

	Spanoxyodon latrunculus n. sp. Simpson 1935
	(1 measurement)
	= Chriacus baldwini Cope 1882	Alroy 2002

	Mimotricentes latidens n. sp. (Gidley 1935)
	(1 measurement)
	= Mimotricentes subtrigonus Cope 1881	Alroy 2002
Mammalia - Phenacodontidae

	Tetraclaenodon puercensis (Cope 1881)
	includes "T. septentrionalis" Thewissen 1990, which included some specimens of T. puercensis
Mammalia - Pantolestidae

	Leptonysson basiliscus n. gen., n. sp. Van Valen 1967	Van Valen 1967
	AMNH 35295 - holotype (left mandible)

	Propalaeosinopa diluculi n. sp. (Simpson 1935)
	= Bessoecetor septentrionalis Russell 1929	Scott et al. 2002
Mammalia - Geolabididae

	Stilpnodon simplicidens n. sp. Simpson 1935
Mammalia - Nyctitheriidae

	Leptacodon munusculum n. sp. Simpson 1935
	(1 measurement)
Mammalia - Mixodectidae

	Eudaemonema cuspidata n. sp. Simpson 1935
	(6 measurements)
Mammalia - Primates - Picrodontidae

	Picrodus silberlingi Douglass 1908
Mammalia - Primates - Plesiadapidae

	Pronothodectes matthewi n. sp. Gidley 1923
	(6 measurements)
Mammalia - Primates - Carpolestidae

	Elphidotarsius florencae n. sp. Gidley 1923
Mammalia - Primates - Paromomyidae

	Paromomys depressidens n. sp. Gidley 1923

	Paromomys maturus n. sp. Gidley 1923
Mammalia - Primates - Palaechthonidae

	Palenochtha minor n. gen., n. sp. (Gidley 1923)
Mammalia - Primates

	Palaechthon alticuspis n. gen., n. sp. Gidley 1923
Mammalia - Macroscelidea - Apheliscidae

	Litomylus dissentaneus n. sp. Simpson 1935

	Haplaletes disceptatrix n. sp. Simpson 1935
Mammalia - Macroscelidea

	Mckennatherium ladae n. sp. (Simpson 1935)
	includes "Mckennatherium libitum" type of Van Valen 1965 (3 measurements)
	= Adunator ladae Simpson 1935	Alroy 2002
Mammalia - Pentacodontidae

	cf. Aphronorus sp. Simpson 1935
	said to be new

	Aphronorus fraudator n. sp. Simpson 1935
Mammalia - Apatemyidae

	Jepsenella praepropera n. gen., n. sp. Simpson 1940
	(1 measurement)
Mammalia - Pantolambdidae

	Pantolambda intermedium n. sp. Simpson 1935
	includes type of "Titanoides simpsoni" of Simons 1960 (1 measurement)
Mammalia - Cimolestidae

	Gelastops parcus n. sp. Simpson 1935
	is "probably from same level" according to Simpson 1935d "probably from Silberling Quarry" according to Simpson 1937a; record definitely includes type of "Emperodon acmeodontoides" Simpson 1935d

	Avunculus didelphodonti n. sp. Van Valen 1966
	see Van Valen 1966 (1 measurement)
Mammalia - Multituberculata - Eucosmodontidae

	Stygimys jepseni n. sp. (Simpson 1935)
Mammalia - Multituberculata - Ptilodontidae

	Ptilodus douglassi n. sp. Simpson 1935
	= Baiotomeus douglassi Simpson 1935	Alroy 2002

	Ptilodus montanus Douglass 1908
Mammalia - Multituberculata - Cimolodontidae

	Anconodon gidleyi n. sp. (Simpson 1935)

	Anconodon cochranensis (Russell 1929)
	includes type of "A. russelli" - see Simpson 1935d
Mammalia - Multituberculata - Neoplagiaulacidae

	Neoplagiaulacidae indet. Ameghino 1890
	two new forms, "1" and "2"

	Parectypodus sinclairi n. sp. (Simpson 1935)

	Mimetodon silberlingi n. sp. (Simpson 1935)

	Mesodma pygmaea n. sp. Sloan 1987	Sloan 1987

	Ectypodus aphronorus n. sp. Sloan 1987	Sloan 1987

	Ectypodus szalayi n. sp. Sloan 1981	Sloan 1981
	(2 measurements)

	Neoplagiaulax grangeri n. sp. (Simpson 1935)
see common names

Geography

Country:	United States	State/province:	Montana	County:	Sweetgrass
Coordinates:	45.8° North, 109.8° West (view map)
Paleocoordinates:	52.5° North, 86.9° West
Basis of coordinate:	based on political unit
Geographic resolution:	small collection

Time

Period:	Paleogene	Epoch:	Paleocene
10 m.y. bin:	Cenozoic 1
*Period:	Tertiary
Key time interval:	Torrejonian
Age range of interval:	63.8 - 60.9 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Fort Union
Local section:	Crazy	Local bed:	1730 ft
Local order:	bottom to top
Stratigraphy comments: said by Buckley 1993 to be in the same (unidentified) reversed polarity chron as Silberling Quarry, i.e., possibly C27r

Lithology and environment

Environment:

terrestrial indet.

Taphonomy

Modes of preservation:

body

Collection methods and comments

Collection size:	1027 specimens
Reason for describing collection:	general faunal/floral analysis
Taxonomic list comments:many of the types were described by Simpson 1935d Simpson 1935d lists the type of "Chriacus pusillus" from "Gidley or Silberling Quarries" - no other specimens are listed but the type's catalogue number is close to that of other types from Gidley Quarry; however, this record is omitted by Simpson 1937a and later authors

Metadata

Database number:	14906
Authorizer:	J. Alroy, C. Bell, J. Marcot	Enterer:	J. Alroy, C. Bell, J. Marcot
Modifier:	J. Alroy	Research group:	vertebrate
Created:	1993-02-18 00:00:00	Last modified:	2007-11-16 16:52:32
Access level:	the public	Released:	1993-02-18 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

2953.

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]

Secondary references:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
3875	5% 50040	J. W. Gidley. 1919. New species of claenodonts from the Fort Union (basal Eocene) of Montana. Bulletin of the American Museum of Natural History 41:541-555 [J. Alroy/J. Alroy/M. Carrano]
76629		P. E. Kondrashov and S. G. Lucas. 2004. Arctocyon from the Paleocene of North America. In S. G. Lucas, K. E. Zeigler, and P. E. Kondrashov (eds.), Paleogene Mammals 11-20 [J. Marcot/J. Marcot]
2905		J. K. Rigby, Jr. 1980. Swain Quarry of the Fort Union Formation, Middle Paleocene (Torrejonian), Carbon County, Wyoming: geologic setting and mammalian fauna. Evolutionary Monographs 3:1-178 [J. Alroy/J. Alroy/J. Marcot]
3195		R. E. Sloan. 1981. Systematics of Paleocene multituberculates from the San Juan Basin, NewMexico. In S. G. Lucas, J. K. Rigby Jr., B. S. Kues (eds.), Advances in San Juan Basin Paleontology 127-160 [J. Alroy/J. Alroy/M. Uhen]
3196		R. E. Sloan. 1987. Paleocene and latest Cretaceous mammal ages, biozones, magnetozones, rates of sedimentation, and evolution. Geological Society of America Special Paper 209:165-200 [J. Alroy/J. Alroy/M. Uhen]
7598		R. M. Sullivan. 1991. Paleocene Caudata and Squamata from Gidley and Silberling quarries, Montana. Journal of Vertebrate Paleontology 11(3):293-301 [J. Alroy/J. Alroy/J. Alroy]
44033		L. Van Valen. 1967. New Paleocene insectivores and insectivore classification. Bulletin of the American Museum of Natural History 135(5):217-284 [P. Mannion/P. Mannion]