Fish Lake Valley (Miocene of the United States)

Also known as UCMP V-2804; UCR RV-6304

Where: Esmeralda County, Nevada (38.0° N, 118.0° W: paleocoordinates 37.8° N, 113.9° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Esmeralda Formation, Clarendonian (13.6 - 10.3 Ma)

• other than biochronology, there is no particular evidence for the stratigraphic position of this locality relative to the Stewart Spring and Cedar Mountain faunas

•dates of Evernden et al. 1964: KA 480 - 11.1 (= 11.39) Ma, 25' above micromammals KA 499 - 11.4 (= 11.70) Ma, just below micromammals

•average is 11.545 Ma

•these dates are not discussed by Perkins et al. 1998

Environment/lithology: terrestrial

Size classes: macrofossils, mesofossils

Reposited in the UCMP

• material from UCMP V-2804 collected by Annie Alexander and Louise Kellogg in 1925

Primary reference: J. R. Macdonald and W. J. Pelletier. 1958. The Pliocene mammalian faunas of Nevada, U.S.A. Paleontologia, taxonomia y evolucion. Cuidad de Mexico: International Geological Congress, 1956 Report of the 7th Session 7:365-388 [J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18888: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Emmanuel Fara and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• Chiatovich Ranch is also known as Arlemont P.O.
Osteichthyes
 Salientia - Pelobatidae
"Scaphiopus alexanderi n. sp." = Scaphiopus (Spea) alexanderi13
"Scaphiopus alexanderi n. sp." = Scaphiopus (Spea) alexanderi13 Zweifel 1956 spadefoot toad
UCMP V-2804
Mammalia
 Rodentia - Cricetidae
Copemys loxodon10, Copemys esmeraldensis n. sp.2, "Copemys dentalis" = Peromyscus dentalis1
Copemys loxodon10 Cope 1874 mouse
discusses continuing confusion among loxodon, longidens, kelloggae, and niobrariensis, all listed by Clark et al. 1964 except the last; loxodon is senior and is used tentatively
Copemys esmeraldensis n. sp.2 Clark et al. 1964 mouse
"Copemys dentalis" = Peromyscus dentalis1 Hall 1930 deer mouse
 Rodentia - Heteromyidae
"Cupidinimus quartus" = Perognathoides quartus1 Hall 1930 rodent
Cupidinimus tertius1 Hall 1930 rodent
Diprionomys cf. parvus2 Kellogg 1910 rodent
 Rodentia - Castoridae
"Eucastor dividerus n. sp." = Prodipoides dividerus
"Eucastor dividerus n. sp." = Prodipoides dividerus Stirton 1935 beaver
from UCMP V-2804: see Stirton 1935
 Rodentia - Mylagaulidae
Hesperogaulus sp.5 Korth 1999 rodent
 Rodentia - Zapodidae
Macrognathomys nanus n. sp. Hall 1930 jumping mouse
see Hall 1930b
 Lagomorpha - Leporidae
Hypolagus fontinalis2 Dawson 1958 rabbit
 Lagomorpha - Ochotonidae
Hesperolagomys galbreathi n. sp.2 Clark et al. 1964 pika
 Lipotyphla - Erinaceidae
Metechinus nevadensis n. sp. Matthew 1929 hedgehog
see Matthew 1929a
 Lipotyphla - Talpidae
Mystipterus vespertilio n. sp. Hall 1930 mole
see Hall 1930d
Domninoides cf. riparensis2 Green 1956 mole
 Perissodactyla - Rhinocerotidae
Teleoceras major6 Hatcher 1894 rhinoceros
 Perissodactyla - Equidae
Hippotherium sp.1 Kaup 1832 hipparionine horse
Hipparion tehonense3 Merriam 1916 hipparionine horse
Pliohippus cf. tantalus Merriam 1913 horse
Hypohippus sp.1 Leidy 1858 anchitheriine horse
type of Merriam 1913 from UCMP loc. 2804
 Tribosphenida - Plesiosoricidae
Plesiosorex latidens1 Hall 1929 placental
 Tribosphenida - Soricidae
Alluvisorex chasseae7 Tedford 1961 shrew
 Carnivora - Mustelidae
Leptarctinae indet.11 Gazin 1936 mustelid carnivore
"Esmeralda beds... 7 1/2 miles north of Chiatovich Ranch, Fish Lake Valley"
 Carnivora - Canidae
Leptocyon matthewi9 Tedford et al. 2009 canine
"UCR locality RV 7407"
Epicyon cf. saevus8 Leidy 1858 bone-crushing dog
 Carnivora - Felidae
? Pseudaelurus sp. Leidy 1858 cat
 Artiodactyla - Tayassuidae
Prosthennops cf. niobrarensis12 Colbert 1935 peccary
 Artiodactyla - Camelidae
Protolabis coartatus4 Stirton 1929 camel
Aepycamelus cf. robustus1 Leidy 1858 camel
 Artiodactyla - Antilocapridae
Paracosoryx cf. alticornis1 Frick 1937 pronghorn