Also known as Chasse Quarry; LACM 1553; UCMP V-3732, V-5376; near Ricardo Postoffice
Where: Kern County, California (35.4° N, 118.0° W: paleocoordinates 36.0° N, 115.6° W)
• coordinate based on political unit
When: Dove Spring Formation, Clarendonian (12.5 - 9.4 Ma)
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Reposited in the LACM
Primary reference: D. P. Whistler and D. W. Burbank. 1992. Miocene biostratigraphy and biochronology of the Dove Spring Formation, Mojave Desert, California, and characterization of the Clarendonian mammal age (late Miocene) in California. Geological Society America Bulletin 104(6):644-658 [J. Alroy/J. Alroy/J. Marcot]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 19517: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
basalt at top of Mbr. 4 dated at 10.5 +/- 0.25 Ma (KA); level slightly higher than this dated at 10.4 +/- 1.6 Ma (FT on zircon); both dates are rejected by Perkins et al. 1998, who revise the former as 10.94 +/- 0.03 Ma (Ar/Ar)
most earlier lists (e.g., Merriam 1917) span the entire formation
Chasse Quarry (LACM 1553) and two UCMP localities placed here based on location of types of "Hesperosorex" chasseae and "Tomarctus" robustus
status unclear: Pliohippus tantalus Merriam 1919: "between the uppermost and second basalt flows 2 1/2 miles north of Ricardo Post Office"
Mammalia | |
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"Copemys dentalis" = Peromyscus dentalis
"Copemys dentalis" = Peromyscus dentalis Hall 1930 deer mouse "Peromyscus" of Tedford 1961 from Chasse Q.
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Cupidinimus tertius Hall 1930 rodent | |
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Ustatochoerus californicus Merriam 1919 oreodont "U. cf. californicus" of Tedford 1961 from Chasse Quarry
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Paracosoryx furlongi Frick 1937 pronghorn | |
Cormohipparion sp.7, Hipparion forcei, Hipparion tehonense, Pliohippus tehonensis, "Pliohippus fairbanksi n. sp." = Pliohippus tantalus3, Dinohippus cf. leardi, ? Protohippus tantalus n. sp.2
Cormohipparion sp.7 Skinner and MacFadden 1977 hipparionine horse UCMP 19787; may include type of "Hipparion mohavense callodonte" from UCMP 2281, see Merriam 1915d, 1919; "H. cf. mohavense" of Tedford 1961
Hipparion forcei Richey 1948 hipparionine horse
Hipparion tehonense Merriam 1916 hipparionine horse
Pliohippus tehonensis Merriam 1915 horse
Dinohippus cf. leardi Drescher 1941 horse | |
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"Epicyon aphobus" = Epicyon haydeni, "Tomarctus robustus n. sp." = Carpocyon robustus, Leptocyon vafer1
"Epicyon aphobus" = Epicyon haydeni Leidy 1858 bone-crushing dog includes "Aelurodon aphobus" and possibly "Osteoborus cf. californicus" of Tedford 1961 from Chasse Q.; includes type from UCMP 2281 and possibly referred specimens from UCMP 2769, 2733 of Merriam 1919; listed by Wang et al. 1999 at LACM 1553, 5428, 5537, 6041, LACM-CIT 6, 1003, UCMP V-2769
"Tomarctus robustus n. sp." = Carpocyon robustus Green 1948 bone-crushing dog see Tedford 1961; from UCMP V-3732
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Mustelidae indet.5 Fischer 1817 mustelid carnivore Chasse Q.; may or may not include type of Mustela buwaldi of Merriam 1919 from UCMP 2282
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"Barbourofelis osborni" = Barbourofelis whitfordi5
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Scapanus shultzi n. sp.
Scapanus shultzi n. sp. Tedford 1961 mole from UCMP V-5376; referred specimen from UCMP V-3732: Tedford 1961
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"Sorex" sp., Alluvisorex chasseae n. sp.
"Sorex" sp. Linnaeus 1758 long-tailed shrew | |
Lanthanotherium sp. Filhol 1888 hedgehog | |
Serbelodon burnhami Osborn 1933 gomphothere may include type of Osborn 1933 from "just above the last basalt flow some miles northeast of Ricardo post office and apparently in or near the base of the Ricardo" although Whistler and Burbank do not indicate the type's position
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