Arroyo de la Parida ( of the United States)

Where: Socorro County, New Mexico (34.0° N, 107.0° W: paleocoordinates 34.1° N, 106.4° W)

• coordinate based on political unit

When: Palomas Formation, Blancan (4.9 - 1.8 Ma)

• "derived from a >70-m-thick succession of sand and gravel" and "medial Blancan" (Sealey et al. 2001)

Environment/lithology: fluvial; sandstone and conglomerate

• "axial-river... facies" (Sealey et al. 2001)

Size class: macrofossils

Primary reference: R. H. Tedford. 1981. Mammalian biochronology of the late Cenozoic basins of New Mexico. Geological Society America Bulletin 92 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 19968: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• 40 m lower stratigraphically than Rhynchotherium material: Lucas et al. 2000
said by Tedford to be in the Sierra Ladrones Fm., but by Lucas et al. to be in the Palomas Fm.
see also Lucas and Morgan 1996
"Rhynchotherium sp." is from the Arroyo de la Parida Rhynchotherium Site: Lucas and Morgan 1996, Lucas et al. 2000
Reptilia
 Testudines - Testudinidae
Hesperotestudo sp.2 Williams 1950 turtle
Mammalia
 Megatherioidea - Megalonychidae
Megalonyx cf. leptostomus1 Cope 1893 edentate
 Proboscidea - Gomphotheriidae
Stegomastodon sp. Pohlig 1912 gomphothere
 Perissodactyla - Equidae
"Equus cf. scotti" = Equus mexicanus, "Equus cf. cumminsii" = Equus (Asinus) cumminsi, "Equus simplicidens" = Plesippus simplicidens
"Equus cf. scotti" = Equus mexicanus Hibbard 1955 horse
"Equus cf. cumminsii" = Equus (Asinus) cumminsi Cope 1893 horse
"Equus simplicidens" = Plesippus simplicidens Cope 1892 horse
present at NMMNH 3310, 1.6 km NW of Rhynchotherium site: Lucas and Morgan 1996
 Artiodactyla - Camelidae
Camelops sp.1 Leidy 1854 camel
Hemiauchenia sp.1 Gervais and Ameghino 1880 camel
 Artiodactyla - Antilocapridae
cf. Capromeryx sp. Matthew 1902 pronghorn