Rancho Gaitan (Eocene of Mexico)

Also known as Locality 5; Locality 7

Where: Chihuahua, Mexico (29.8° N, 104.5° W: paleocoordinates 31.2° N, 97.0° W)

• coordinate based on nearby landmark

When: Preitos Formation, Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: I. Ferrusquia. 1984. Brief Account of Cenozoic Vertebrate Paleontology in Middle America. Journal of Vertebrate Paleontology 4(2) [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17015: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
Testudines indet.2 turtle
Carapace fragment
Mammalia
 Rodentia - Ischyromyidae
Mytonomys gaitania Ferrusquia and Wood 1969 rodent
at Loc. 5, see Wood 1974
 Rodentia - Cylindrodontidae
Pseudocylindrodon pintoensis n. sp. Ferrusquia and Wood 1969 rodent
from Locs. 2, 5, and 7: see Wood 1974; no specimens for Loc. 5 are listed
Jaywilsonomys ojinagaensis n. sp. Ferrusquia and Wood 1969 rodent
from Loc. 7: see Wood 1974
 Perissodactyla - Brontotheriidae
Brontops cf. brachycephalus Osborn 1902 brontothere
 Perissodactyla - Hyracodontidae
? Hyracodon sp. Leidy 1856 odd-toed ungulate
i.d. is certain according to Ferrusquia 1993
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet. Gray 1821 rhinoceros
 Perissodactyla - Equidae
Mesohippus sp.1 Marsh 1875 anchitheriine horse
 Tribosphenida -
? Soricoidea indet. Gill 1872 placental
 Hyaenodonta - Hyaenodontidae
? Hyaenodontidae indet.1 Leidy 1869 eutherian
 Artiodactyla - Merycoidodontidae
Aclistomycter middletoni Wilson 1971 oreodont
Bathygenys alpha Douglass 1902 oreodont
Merycoidodon sp.1 Leidy 1848 oreodont
 Artiodactyla - Agriochoeridae
Protoreodon petersoni Gazin 1955 agriochoerid
Agriochoerus maximus Douglass 1902 agriochoerid
 Artiodactyla - Hypertragulidae
Hypertragulus heikeni n. sp. Ferrusquia-Villafranca 1969 ruminant
 Artiodactyla - Leptomerycidae
cf. Leptomeryx sp. Leidy 1853 ruminant