Ricardo: Clarendonian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Rodentia - Sciuridae
Sciuridae indet. Gray 1821
Tedford 1961
Chasse Q.
Mammalia - Rodentia - Geomyidae
Geomyidae indet. Bonaparte 1845
    = "Thomomys" sp. Wied-Neuwied 1839
Tedford 1961
Mammalia - Rodentia - Heteromyidae
Perognathus furlongi Gazin 1930
Whistler 1991
Perognathus sp. Maximillian 1839
    = Perognathus minutus James 1963
Alroy 2002
replaces ID of Tedford 1961 from Chasse Q.
Cupidinimus tertius (Hall 1930)
Mammalia - Rodentia - Cricetidae
Copemys dentalis (Hall 1930)
original and current combination Peromyscus dentalis
"Peromyscus" of Tedford 1961 from Chasse Q.
Mammalia - Lagomorpha - Leporidae
Hypolagus sp. Dice 1917
    = Archaeolaginae indet.
Tedford 1961
Mammalia - Erinaceidae
Lanthanotherium sp. (Filhol 1888)
original and current combination Lantanotherium
Mammalia - Soricidae
Alluvisorex chasseae n. sp. (Tedford 1961)
from Chasse Quarry: see Tedford 1961
"Sorex" sp. Linnaeus 1758
Mammalia - Talpidae
Scapanus shultzi n. sp. Tedford 1961
from UCMP V-5376; referred specimen from UCMP V-3732: Tedford 1961
Mammalia - Perissodactyla - Rhinocerotidae
Peraceras superciliosum (Cope 1880)
Prothero 2005
original and current combination Peraceras superciliosus
Teleoceras meridianum (Leidy 1865)
Prothero 2005
Mammalia - Perissodactyla - Equidae
Hipparion forcei Richey 1948
Hipparion tehonense (Merriam 1916)
recombined as Hipparion gratum tehonense
? Hipparion mohavense n. sp. Merriam 1913
Merriam 1913
UCMP 19787; may include type of "Hipparion mohavense callodonte" from UCMP 2281, see Merriam 1915d, 1919; "H. cf. mohavense" of Tedford 1961
    = Cormohipparion sp. Skinner and MacFadden 1977
Woodburne 2007
Dinohippus cf. leardi (Drescher 1941)
? Protohippus tantalus n. sp. Merriam 1913
Merriam 1913
UCMP 19434 and 21221
Pliohippus fairbanksi n. sp. Merriam 1915
Merriam 1915
synonym of Protohippus tantalus
UCMP 19789
Pliohippus tehonensis (Merriam 1915)
Mammalia - Camelidae
Camelidae indet. Gray 1821
Tedford 1961
Chasse Q.
Mammalia - Antilocapridae
Paracosoryx furlongi (Frick 1937)
Cosoryx sp. Leidy 1869
possibly "Merycodus sp." of Tedford 1961 from Chasse Q.
Plioceros sp. Frick 1937
"Sphenophalos" of Tedford 1961
Mammalia - Merycoidodontidae
Ustatochoerus californicus (Merriam 1919)
"U. cf. californicus" of Tedford 1961 from Chasse Quarry
Mammalia - Carnivora - Nimravidae
Felidae indet. Gray 1821
    = Barbourofelis osborni Merriam 1919
Tedford 1961
synonym of Barbourofelis whitfordi
Mammalia - Carnivora - Mustelidae
Mustelidae indet. Fischer 1817
Tedford 1961
Chasse Q.; may or may not include type of Mustela buwaldi of Merriam 1919 from UCMP 2282
Mammalia - Carnivora - Canidae
Vulpes sp. Frisch 1775
    = Leptocyon vafer Leidy 1858
Alroy 2002
replaces ID of Tedford 1961; may include "Canis nr. vafer" of Merriam 1919 from UCMP 2731
Tomarctus robustus n. sp. Green 1948
recombined as Carpocyon robustus
see Tedford 1961; from UCMP V-3732
Epicyon aphobus (Merriam 1919)
synonym of Epicyon haydeni
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
Mammalia - Proboscidea - Gomphotheriidae
Serbelodon burnhami Osborn 1933
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
see common names

Geography
Country:United States State/province:California County:Kern
Coordinates: 35.4° North, 118.0° West (view map)
Paleocoordinates:36.0° North, 115.6° West
Basis of coordinate:based on political unit
Time
Period:Neogene Epoch:Miocene
*Period:Tertiary
Key time interval:Clarendonian
Age range of interval:13.60000 - 10.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Dove Spring
Local section:DoveS Local bed:3
Local order:bottom to top
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Museum repositories:LACM
Taxonomic list comments:upper Mbr. 4 and lower Mbr. 5; = upper "C. avawatz./ P. furlongi" and lower "E. aphobus/H. forcei" zones
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"
Metadata
Also known as:Chasse Quarry; LACM 1553; UCMP V-3732, V-5376; near Ricardo Postoffice
Database number:19517
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Marcot Research group:vertebrate
Collections that are a subset of this one:188947
Created:1993-02-18 00:00:00 Last modified:2020-04-20 15:44:36
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

3627. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
14303 J. C. Merriam. 1913. New Protohippine Horses From Tertiary Beds on the Western Border of the Mohave Desert. University of California Publications Bulletin of the Department of Geology 7(23):435-442 [R. Whatley/R. Whatley/J. Marcot]
2565 J. C. Merriam. 1915. New Horses From the Miocene and Pliocene of California. University of California Publications, Bulletin of the Department of Geology 9(4):49-58 [J. Alroy/J. Alroy/J. Marcot]
51726 D. R. Prothero. 2005. The Evolution of North American Rhinoceroses. 1-218 [J. Marcot/J. Marcot]
3377 R. H. Tedford. 1961. Clarendonian Insectrivora from the Ricardo Formation, Kern County California. Bulletin of the Southern California Academy of Sciences 60(2):57-76 [J. Alroy/J. Alroy/M. Uhen]
3626 D. P. Whistler. 1991. Geologic history of the El Paso Mountains region. San Bernardino County Museum Association Quarterly 38(3):108-113 [J. Alroy/J. Alroy/J. Alroy]
45368 M. O. Woodburne. 2007. Phyletic diversification of the Cormohipparion occidentale complex (Mammalia; Perissodactyla, Equidae), Late Miocene, North America, and the origin of the Old World Hippotherium datum. Bulletin of the American Museum of Natural History 306(1):1-138 [P. Wagner/P. Wagner]