Also known as Simpson's Locality 1; Fish Creek; Bear Butte; Widdecombe Creek; Widdecombe Ranch
Where: Sweetgrass County, Montana (45.8° N, 109.8° W: paleocoordinates 52.4° N, 86.8° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: "Upper Lebo" Beds Member ("Fort Union" (= Lebo) Formation), Torrejonian (63.8 - 60.9 Ma)
• in a stratigraphically isolated reversed polarity zone interpreted as chron C27r: Butler et al. 1987
Environment/lithology: terrestrial; lithology not reported
Size classes: macrofossils, mesofossils
Collected by Silberling
Primary reference: G. G. Simpson. 1937. The Fort Union of the Crazy Mountain field, Montana and its mammalian faunas. Bulletin of the United States National Museum 169:1-287 [J. Alroy/J. Alroy/M. Carrano]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 14913: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd and Terri Cleary
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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Eudaemonema cuspidata Simpson 1935 placental | |
Elpidophorus minor n. sp.
Elpidophorus minor n. sp. Simpson 1937 colugo | |
Paromomys maturus Gidley 1923 primate | |
Picrodus silberlingi n. sp.
Picrodus silberlingi n. sp. Douglass 1908 primate see Douglass 1908; includes Douglass' type of "Megopterna minuta"
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Palaechthon alticuspis Gidley 1923 primate | |
Dissacus sp. Cope 1881 condylarth | |
Prothryptacodon furens Simpson 1935 placental | |
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Gelastops parcus Simpson 1935 eutherian | |
Aphronorus fraudator Simpson 1935 eutherian | |
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Psittacotherium multifragum Cope 1882 taeniodont | |
Reptilia | |
Proxestops silberlingii n. sp.7
Proxestops silberlingii n. sp.7 Gilmore 1938 squamates Gilmore 1938: ?Harpagosaurus silberlingii, USNM 13877 (holotype), greater portion of left maxilla with whole or parts of 12 teeth
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Peltosaurus sp.7 Cope 1873 squamates USNM 10446, 10444, 10811, three fragmentary dentaries described by Gilmore (1928); USNM 10920, incomplete left maxilla with a few teeth, described by Gilmore (1938)
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