Fort Logan ( of the United States)
Where: Meagher County, Montana (46.5° N, 111.0° W: paleocoordinates 47.6° N, 105.1° W)
• coordinate based on political unit
When: Arikareean (30.8 - 20.4 Ma)
Environment/lithology: terrestrial
Primary reference: E. Douglass. 1903. New vertebrates from the Montana Tertiary. Annals of Carnegie Museum 2(5):145-199 [J. Alroy/J. Alroy/J. Alroy]more details
PaleoDB collection 17509: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
• part of the "Deep River" fauna, restricted to the "older formation"; may still be stratigraphically mixed, but recognized by both Koerner 1940 and Tedford et al. 1987 and faunistically not at all unusual for a Gering equivalent
based on Wang 1994, collections of Scott 1895 include Crabtree Bluff, Thompson Gulch North, and Spring Creek and are therefore from the central part of T10N R5E
based on Wang 1994, collections of Scott 1895 include Crabtree Bluff, Thompson Gulch North, and Spring Creek and are therefore from the central part of T10N R5E
Show authors, comments, and common names
Mammalia | |
Cynodesmus thooides n. sp.
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Miohippus ? equiceps Cope 1878 anchitheriine horse | |
Diceratherium annectens5 Marsh 1873 rhinoceros "Arikareean, Deep River beds, Fort Logan Formation, Meagher County, Montana"
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"Cyclopidius loganensis n. sp." = Leptauchenia decora, "Cyclopidius heterodon n. sp." = Sespia heterodon3, "Mesoreodon chelonyx" = Mesoreodon chelonyx, "Mesoreodon intermedius" = Mesoreodon chelonyx, "Eporeodon meagherensis n. sp." = Mesoreodon chelonyx, "Mesoreodon danai n. sp." = Mesoreodon chelonyx, "Mesoreodon wheeleri n. sp." = Desmatochoerus megalodon7, "Promerycochoerus thorpei n. sp." = Desmatochoerus hatcheri
"Cyclopidius loganensis n. sp." = Leptauchenia decora Leidy 1856 oreodont sec 5 T10N R5E; includes "Sespia heterodon" of Schultz and Falkenbach 1968 from "7 miles southeast of Fort Logan"
"Mesoreodon chelonyx" = Mesoreodon chelonyx Scott 1893 oreodont includes "M. intermedius" and types of "M. danai," "M. wheeleri," and "Eporeodon meagherensis" of Koerner 1940, former two from sec 15 T10N R5E, latter from sec 17 T11N R5E
"Mesoreodon intermedius" = Mesoreodon chelonyx Scott 1893 oreodont
"Eporeodon meagherensis n. sp." = Mesoreodon chelonyx Scott 1893 oreodont
"Mesoreodon danai n. sp." = Mesoreodon chelonyx Scott 1893 oreodont
"Promerycochoerus thorpei n. sp." = Desmatochoerus hatcheri Douglass 1907 oreodont | |
Hypertragulus calcaratus Cope 1873 ruminant | |
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Pronodens silberlingi n. gen. n. sp.4
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Niglarodon koerneri n. sp.2
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"Steneofiber montanus" = Agnotocastor montanus
"Steneofiber montanus" = Agnotocastor montanus Scott 1893 beaver | |
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