Jeff's Discovery (Eocene of the United States)

Also known as SDSNH 3276

Where: San Diego County, California (33.2° N, 117.3° W: paleocoordinates 33.4° N, 104.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: upper Member (Santiago Formation), Late/Upper Uintan (46.2 - 39.7 Ma)

• reversed polarity: Prothero 2001

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; siliciclastic sediments

Size class: macrofossils

Primary reference: S. L. Walsh. 1991. Eocene mammal faunas of San Diego County. Pacific Section SEPM 68:161-178 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16585: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Patricia Holroyd and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• SDSNH Locs. 3560 - 3564 also belong to this L.F., but all small mammals are present at 3276, and most of the large mammals appear to be present here as well
Mammalia
 Tribosphenida - Peradectidae
Peradectes californicus Stock 1936 marsupial
 Tribosphenida - Herpetotheriidae
"Copedelphys cf. innominata" = Herpetotherium innominatum1
"Copedelphys cf. innominata" = Herpetotherium innominatum1 Simpson 1928 marsupial
 Chiroptera -
Chiroptera indet. Blumenbach 1779 bat
a bat: two forms DUPLICATE REF 3537 or 3538
 Acreodi - Mesonychidae
Mesonychidae indet.6 Cope 1875 condylarth
 Ferae -
Procynodictis progressus6 Stock 1935 placental
? Miacis cf. hookwayi6 Stock 1934 placental
Tapocyon dawsonae n. sp.8 Wesley and Flynn 2003 placental
 Creodonta -
Limnocyon sp.6 Marsh 1872 creodont
 Creodonta - Oxyaenidae
Diegoaelurus vanvalkenburghae n. gen. n. sp.9 Zach et al. 2022 creodont
cf. Apataelurus sp.6 Scott 1937 creodont
 Perissodactyla - Hyracodontidae
? Triplopus woodi6 Stock 1936 odd-toed ungulate
probably "cf. Hyracodontidae indet."
 Perissodactyla - Amynodontidae
Amynodon cf. advenus1 Marsh 1875 odd-toed ungulate
 Perissodactyla -
Hesperaletes borineyi2 Colbert 2006 odd-toed ungulate
 Artiodactyla - Protoceratidae
Leptoreodon golzi n. sp.3 Ludtke and Prothero 2004 protoceratid
 Artiodactyla - Agriochoeridae
Protoreodon walshi5 Theodor 1999 agriochoerid
SDSNH 3276, 3560, 3561, 3562; "P. sp." of Walsh 1996b; "P. cf. parvus"
 Artiodactyla - Leptochoeridae
Ibarus cf. ignotus6 Storer 1984 even-toed ungulate
 Artiodactyla - Oromerycidae
Protylopus sp.6 Wortman 1898 even-toed ungulate
Protylopus stocki1 Golz 1976 even-toed ungulate
 Artiodactyla - Diacodexeidae
Tapochoerus mcmillini7 Walsh 2000 even-toed ungulate
SDSNH 3276, 3562, 3564; "? Antiacodon sp." of Walsh 1996b
 Tribosphenida - Sespedectidae
Sespedectes singularis Stock 1935 placental
also at SDSNH 3564: Walsh 1998 DUPLICATE REF 3537 or 3538
Proterixoides davisi Stock 1935 placental
Walsh 1998 DUPLICATE REF 3537 or 3538
 Soricomorpha - Geolabididae
Centetodon sp. Marsh 1872 placental
Batodonoides powayensis Novacek 1976 placental
 Soricomorpha - Oligoryctidae
Oligoryctes sp.6 Hough 1956 placental
two forms; "Apternodontidae indet."
 Tribosphenida -
Aethomylos simplicidens1 Novacek 1976 placental
 Primates - Omomyidae
Ourayia sp., Dyseolemur pacificus, "Phenacolemur cf. shifrae" = Walshina shifrae
Ourayia sp. Gazin 1958 tarsier
Dyseolemur pacificus Stock 1934 tarsier
"Phenacolemur cf. shifrae" = Walshina shifrae Krishtalka 1978 tarsier
DUPLICATE REF 3537 or 3538
 Primates - Microsyopidae
Uintasorex sp. Matthew 1909 primate
 Rodentia - Cylindrodontidae
Pareumys sp. Peterson 1919 rodent
 Rodentia - Eomyidae
cf. Paradjidaumo sp.6 Burke 1934 rodent
Metanoiamys sp.1 Chiment and Korth 1996 rodent
 Rodentia -
Griphomys alecer1 Wilson 1940 rodent
 Rodentia - Sciuravidae
Sciuravus powayensis6 Wilson 1940 rodent
 Rodentia - Simimyidae
Simimys simplex Wilson 1935 rodent
also at SDSNH 3650 - 3564: Walsh 1997 DUPLICATE REF 3537 or 3538
 Rodentia - Ischyromyidae
Ischyromyidae indet. Alston 1876 rodent
large DUPLICATE REF 3537 or 3538
Rapamys fricki Wilson 1940 rodent
Eohaplomys cf. tradux1 Stock 1935 rodent
Manitshini indet.6 Simpson rodent
Microparamys woodi6 Kelly and Whistler 1994 rodent
"M. cf. D Wood"
 Cimolesta - Apatemyidae
Apatemys downsi1 Gazin 1958 eutherian
Gastropoda
  -
Gastropoda indet.4 Cuvier 1795 snail
"high-spired pleurocerid or thiarid freshwater gastropods"
 Pulmonata -
Pulmonata indet.4 Cuvier 1817 pulmonate
"a minimum of five (and perhaps a maximum of ten) land snail species"
 Cycloneritida - Helicinidae
Helicinidae indet.4 FĂ©russac 1822 snail
Scenopagus
  -
Scenopagus sp.6 McKenna and Simpson 1959