Also known as CIT 63; UCMP 1083, 1100, 1101, 1103, 1105, 2744
DUPLICATE REF 3234 or 3235
Where: Humboldt County, Nevada (41.1° N, 117.8° W: paleocoordinates 41.5° N, 116.2° W)
• coordinate based on political unit
When: Thousand Creek Formation, Hemphillian (10.3 - 4.9 Ma)
• "Tephrochronology and Ar/Ar dates indicate the Thousand Creek Formation was deposited between ~8.3-7.0 Ma (Perkins et al. 1998). However, this age conflicts with the radiometric age for the capping basalt, dated to ~9 Ma (Green 1984)." (Prothero & Davis 2008)
• formation-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
Size classes: macrofossils, mesofossils
Primary reference: R. A. Stirton. 1940. The Nevada Miocene and Pliocene mammalian faunas as faunal units. Proceedings of the Sixth Pacific Science Congress 2:627-640 [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 19095: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
ash near top of section correlated geochemically with the Rattlesnake Tuff, which overlies the Rattlesnake fauna (see), by Perkins et al. 1998
Munthe 1988 mentions a questionable record of "Tomarctus kelloggi" at Thousand Creek that is actually T. sp.; this may be Stirton's indeterminate canid
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Lutravus halli n. sp.2 Furlong 1932 mustelid carnivore from CIT 63; reference apparently overlooked by both Macdonald and Pelletier 1958 and Stirton
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Pliogale furlongi n. sp.
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Epicyon saevus8 Leidy 1858 bone-crushing dog probably includes "Aelurodon sp." of Merriam and Stock 1928
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Neohipparion leptode n. sp. Merriam 1915 hipparionine horse from UCMP 1101: see Merriam 1915c, Merriam and Stock 1928, Stock 1951 DUPLICATE REF 3234 or 3235
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Chalicotheriidae indet. Gill 1872 chalicothere present in older collections DUPLICATE REF 3234 or 3235
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Ilingoceros schizoceros n. sp. Merriam 1911 pronghorn may be a juvenile I. alexandrae DUPLICATE REF 3234 or 3235
Sphenophalos nevadanus n. sp. Merriam 1909 pronghorn includes "Plioceros sp." of Frick 1937 because Frick seems to regard Sphenophalos as a nomen dubium and Plioceros as a replacement DUPLICATE REF 3234 or 3235
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Hypolagus vetus n. sp.
Hypolagus vetus n. sp. Kellogg 1910 rabbit UCMP 1100; Dawson 1958: also at CIT 63 DUPLICATE REF 3234 or 3235
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Peromyscus antiquus n. sp.
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Liodontia furlongi Gazin 1932 mountain beaver UCMP 1103: type, Gazin 1932 DUPLICATE REF 3234 or 3235
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"Paenemarmota nevadensis" = Marmota nevadensis1, Marmota minor n. sp., "Spermophilus argonautus" = Citellus (Otospermophilus) argonautus1
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Diprionomys minimus n. sp.3 Kellogg 1910 rodent type of Wood 1936c is from UCMP 1103 according to Wilson 1937b
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