Gaillard Cut (Miocene of Panama)

Where: Panama (9.1° N, 79.7° W: paleocoordinates 8.5° N, 77.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cucaracha Formation, Early/Lower Hemingfordian (20.4 - 16.0 Ma)

• a 45 m thick section according to Whitmore and Stewart 1965, but "from a narrow stratigraphic interval" (MacFadden and Higgins 2004)

•formation is different from Woodring 1957 - see MacFadden 2006 for more info

•early Hemingfordian in age, from the early Miocene (MacFadden et al., 2014).

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the USNM

Primary reference: I. Ferrusquia-Villafranca. 1978. Bol Univ Nac Aut Mex Inst Geol 101:193-321 [J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18725: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Equidae
Anchitherium clarencei1 Simpson 1932 anchitheriine horse
Archaeohippus sp. Gidley 1906 anchitheriine horse
compared to A. blackbergi by Whitmore and Stewart
 Perissodactyla - Rhinocerotidae
Floridaceras whitei1 Wood 1964 rhinoceros
Menoceras barbouri1 Wood 1964 rhinoceros
 Artiodactyla - Protoceratidae
Paratoceras wardi1 Patton and Taylor 1973 protoceratid
see also Patton and Taylor 1971
 Artiodactyla - Merycoidodontidae
Merycoidodontidae indet. Cook 1912 oreodont
said to be "intermediate between Merychochoerus and Brachycrus"
Merycochoerus matthewi1 Loomis 1924 oreodont
 Artiodactyla - Tayassuidae
""Cynorca" occidentale" = Tedfordhyus occidentalis3
""Cynorca" occidentale" = Tedfordhyus occidentalis3 Woodburne 1969 peccary
 Placentalia -
Carnivora indet.2 Bowdich 1821 carnivoran
not the same as Tomarctus or the amphicyonid
 Carnivora -
Arctoidea indet.1 Flower 1869 carnivoran
"Amphicyonidae or Hemicyonidae"
 Carnivora - Canidae
Tomarctus brevirostris1 Cope 1873 bone-crushing dog
 Rodentia -
Texomys stewarti4 Slaughter 1981 rodent
"Cucaracha Formation... vicinity of Pedro Miguel Lock, Panama Canal"