Almagre (Upper Largo) (Eocene of the United States)

Also known as AMNH Quarry 58; Mercer Ranch

Where: Rio Arriba County, New Mexico (36.5° N, 107.0° W: paleocoordinates 41.2° N, 91.7° W)

• coordinate based on political unit

When: San Jose Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Primary reference: M. J. Novacek. 1982. Diacodon alticuspis, an erinaceomorph insectivore from the early Eocene of northern New Mexico. Contributions to Geology, University of Wyoming 20(2):135-149 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15449: authorized by John Alroy, entered by John Alroy on 26.07.1994, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• from the headwaters of the Upper Largo
records from a cluster of sites shown to be on the Continental Divide between Canada Larga and Almagre Arroyo by Lucas et al. 1981 are given below; all of them are within 2 km N or NW of AMNH Quarry 58, including AMNH Quarries 51 and 59 and NMMNH Locs. 963, 1028
sites within 1 mi W of Quarry 58 such as NMMNH 386, 1015, 1020 also are included
Quarry 58 is close to Simpson's Section 2, which spans the upper 450' of a 900' composite section Apatemys bellulus - "Teilhardella whitakeri": Simpson 1954; type, from AMNH Quarry 59 Cantius frugivorus Williamson et al. 1989: NMMNH Loc. 963, Loc. 1020 Pelycodus danielsae Froehlich and Lucas 1991: type; NMMNH L-386 Meniscotherium chamense Williamson and Lucas 1992a: NMMNH Loc. 1028
Reptilia
 Squamata - Anguidae
Glyptosaurinae indet.3 Marsh 1872 squamates
AMNH loc. 58
Mammalia
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
 Theriamorpha -
Diacodon alticuspis Cope 1875 placental
AMNH Quarry 58
 Primates - Microsyopidae
"? Navajovius mckennai n. sp." = Choctawius mckennai4
"? Navajovius mckennai n. sp." = Choctawius mckennai4 Szalay 1969 primate
AMNH Quarry 58
 Primates - Adapidae
Pelycodus jarrovii2 Cope 1874 primate
two AMNH specimens from a coordinate within 1/4 mi of AMNH Quarry 58; Williamson et al. 1989 also list this at nearby NMMNH Loc. 1015