Skull Ridge (Miocene of the United States)

Where: Santa Fe County, New Mexico (35.5° N, 106.2° W: paleocoordinates 36.1° N, 103.1° W)

• coordinate based on political unit

When: Skull Ridge Member (Tesuque Formation), Early/Lower Barstovian (16.0 - 13.6 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the AMNH

Primary reference: R. H. Tedford. 1981. Mammalian biochronology of the late Cenozoic basins of New Mexico. Geological Society America Bulletin 92 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 19547: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• includes White Operation Quarry (see), but list is quite different
FT on zircon dates, in Ma:
No. 2 white ash: 14.6 +/- 1.2
No. 4 white ash: 14.1 +/- 1.1
second date on No. 4 ash (Izett & Naeser 1986): 12.7 +/- 1.4
No. 4 white ash redated at 15.42 +/- 0.06 Ma (SCLF Ar-Ar on sanidine) by McIntosh and Quade 1995; No. 3 white ash dated at 15.65 +/- 0.065 Ma according to Quade (1999 personal communication); White Operation Quarry is "just below" the No. 4 ash according to McIntosh and Quade
No. 2 ash redated at 15.59 +/- 0.07 Ma (SCLF AA on sanidine): Kuhle and Smith 2001
underlies Pojoaque Mbr.
"Cosoryx ilfonsensis" of Frick 1937 is omitted by Tedford and Barghoorn 1993
Mammalia
 Rodentia - Heteromyidae
"Cupidinimus cf. kleinfelderi" = Perognathoides kleinfelderi6
"Cupidinimus cf. kleinfelderi" = Perognathoides kleinfelderi6 Storer 1970 rodent
"Skull Ridge Member, east of Three Sisters Buttes"
 Rodentia - Mylagaulidae
Notogaulus major7 Korth 2013 rodent
Notogaulus minor7 Korth 2013 rodent
Ceratogaulus robustus n. sp.7 Korth 2013 rodent
Alphagaulus vetus7 Matthew 1924 rodent
 Lipotyphla - Erinaceidae
Metechinus amplior12 Rich 1981 hedgehog
Skull Ridge
Untermannerix copiosus12 Rich 1981 hedgehog
South Skull Ridge, Skull Ridge Mbr.
 Perissodactyla - Rhinocerotidae
Teleoceras brachyrhinum n. sp.9 Prothero 2005 rhinoceros
Peraceras profectum9 Matthew 1899 rhinoceros
Aphelops megalodus9 Cope 1873 rhinoceros
includes "Tesque Locality" and "Skull Ridge" from ""Skull Ridge Member"
 Perissodactyla - Equidae
"Merychippus cf. intermontanus" = Scaphohippus intermontanus Merriam 1915 horse
Acritohippus isonesus1 Cope 1889 horse
Anchitheriinae indet.13 Leidy 1869 anchitheriine horse
"unnamed genus close to Anchitherium"; presumably includes "Anchitherium sp."
Megahippus sp.13 McGrew 1938 anchitheriine horse
"small"
Hypohippus cf. pertinax13 Matthew 1918 anchitheriine horse
 Carnivora - Ursidae
Plithocyon sp.4 Ginsburg 1955 bear
said to be new; "Hemicyon sp."
 Carnivora - Procyonidae
Bassariscus cf. parvus2 Hall 1927 ringtail
"west of Cuyamunque"; "southeast of White Operation"; "Third District"; "Skull Ridge" (sensu stricto); "west of highway and north of boundary of Pojoaque Grant, above #4 white ash"; "J Rak wash, 25 feet above ash F"
 Carnivora - Amphicyonidae
Amphicyon ingens Matthew 1924 bear-dog
Cynelos sinapius1 Matthew 1902 bear-dog
 Carnivora - Canidae
Osbornodon fricki n. sp.15 Wang 1994 canid
from Skull Ridge N of Pojoaque Church and S of Arroyo Seco
Leptocyon leidyi14 Tedford et al. 2009 canine
Paracynarctus kelloggi16 Merriam 1911 bone-crushing dog
"Cuyamunque"; "Tesuque"; "east of Tesuque"; "east of Tesuque Fault"; "west of Tesuque, Tesuque Boundary wash, light band east of Tesuque Fault"; "1 mi east of Cuyamunque"; and "5 ft below Ash A in block no. 3 south of Arroyo Seco, Skull Ridge"
Psalidocyon marianae n. sp.16 Wang et al. 1999 bone-crushing dog
"southeast of White Operation, Skull Ridge Member... Sante Fe County"
Microtomarctus cf. conferta13 Matthew 1918 bone-crushing dog
Cynarctoides acridens16 Barbour and Cook 1914 bone-crushing dog
"Tesuque Grant, Skull Ridge Member... Santa Fe County"
Tomarctus brevirostris16 Cope 1873 bone-crushing dog
"Skull Ridge"; "Third District"
Tomarctus hippophaga16 Matthew and Cook 1909 bone-crushing dog
"Southeast of White Operation Wash"; "Cuyamunque"; "One mi north of White Operation"
 Ungulata - Merycoidodontidae
Brachycrus siouense5 Sinclair 1915 oreodont
Merychyus sp. Leidy 1858 oreodont
see Schultz and Falkenbach 1947: "Lower... 'Santa Fe Beds'"
 Ungulata - Camelidae
Rakomylus raki3 Frick 1937 camel
Protolabis sp.13 Cope 1876 camel
Michenia sp.13 Frick and Taylor 1971 camel
Australocamelus sp.13 Patton 1969 camel
Miolabis sp.13 Hay 1899 camel
Paramiolabis minutus8 Pagnac 2005 camel
Nothotylopus sp.13 Patton 1969 camel
Aepycamelus sp.13 Macdonald 1956 camel
 Ungulata - Palaeomerycidae
Dromomeryx borealis11 Cope 1877 ruminant
 Ungulata - Antilocapridae
Merycodus sp.13 Leidy 1854 pronghorn
 Ungulata - Moschidae
Blastomeryx gemmifer10 Cope 1874 musk deer