Matachic (Neogene of Mexico)

Also known as CIT 281, 295, 296, 297, 298, 299, UALP Y18, Y23, Y24, Y25, Y29, Y30

Where: Chihuahua, Mexico (28.5° N, 107.8° W: paleocoordinates 28.9° N, 106.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Late/Upper Hemphillian (10.3 - 4.9 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: E. H. Lindsay. 1984. Late Cenozoic Mammals from Northwestern Mexico. Journal of Vertebrate Paleontology 4(2):208-215 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18734: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• sites from a 20 m horizon
about 15 km from Yepomera, but previous authors included these sites in the Yepomera fauna
Mammalia
 Rodentia - Sciuridae
Spermophilus matachicensis n. sp. Wilson 1949 ground squirrel
see Wilson 1949e: from CIT 299, Arroyo de los Pinos
Parapaenemarmota pattersoni Wilson 1949 squirrel
 Perissodactyla - Equidae
Neohipparion eurystyle Cope 1893 hipparionine horse
Dinohippus mexicanus Lance 1950 horse
Astrohippus cf. stockii Lance 1950 horse
 Carnivora - Ursidae
Agriotherium cf. schneideri Sellards 1916 bear
 Artiodactyla - Antilocapridae
Hexobelomeryx fricki Furlong 1941 pronghorn