La Rinconada (Neogene of Mexico)

Also known as GTO-43

Where: Guanajuato, Mexico (21.1° N, 100.8° W: paleocoordinates 21.4° N, 99.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Rancho Viejo Beds Formation, Late/Upper Hemphillian (10.3 - 4.9 Ma)

• said to be late Hemphillian

•most material is from a 2 m interval

•immediately underlies a fission track on zircon date of 4.4 +/- 0.3 Ma (Flynn et al. 2005)

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: O. Carranza-Castaneda. 1992. Una nueva localidad del henfiliano tardio en la mesa central de Mexico. Revista Mexicana de Ciencias Geologicas 10(2):179-196 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18740: authorized by John Alroy, entered by John Alroy on 12.04.1997, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Lagomorpha - Leporidae
Notolagus velox3 Wilson 1937 rabbit
 Perissodactyla - Rhinocerotidae
Teleoceras sp.3 Hatcher 1894 rhinoceros
 Perissodactyla - Equidae
Nannippus aztecus3 Mooser 1968 hipparionine horse
Neohipparion eurystyle Cope 1893 hipparionine horse
Dinohippus mexicanus Lance 1950 horse
Astrohippus stockii Lance 1950 horse
 Artiodactyla - Tayassuidae
Tayassuinae indet.1, "Catagonus brachydontus" = Protherohyus brachydontus2
Tayassuinae indet.1 Palmer 1897 peccary
"Catagonus brachydontus" = Protherohyus brachydontus2 Dalquest and Mooser 1980 peccary
 Artiodactyla - Camelidae
Alforjas sp.2 Harrison 1979 camel
Megatylopus cf. matthewi3 Webb 1965 camel
"Hemiauchenia vera" = Pleiolama vera3 Matthew 1909 camel
 Artiodactyla - Antilocapridae
Hexobelomeryx cf. fricki3 Furlong 1941 pronghorn
Texoceros sp.2 Frick 1937 pronghorn
 Carnivora - Felidae
Amphimachairodus alvarezi n. sp.4 Ruiz-Ramoni et al. 2019 cat
? Pseudaelurus intrepidus2 Leidy 1858 cat
 Carnivora - Mustelidae
Taxidea sp.2 Waterhouse 1839 badger
Taxidea mexicana2 Drescher 1939 badger
 Carnivora - Ursidae
"Agriotherium cf. schneideri" = Huracan schneideri
"Agriotherium cf. schneideri" = Huracan schneideri Sellards 1916 bear
described by Miller and Carranza 1996
 Carnivora - Canidae
Borophagus secundus1 VanderHoof 1931 bone-crushing dog
 Proboscidea - Gomphotheriidae
? Rhynchotherium sp. Falconer 1868 gomphothere
compared to R. edensis