Gastao (Miocene of Brazil)

Also known as Locality 3 (Simpson and Paula Couto 1981)

Where: Acre, Brazil (8.8° S, 72.8° W: paleocoordinates 9.1° S, 71.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Acre Conglomerate Member (Madre de Dios Formation), Late/Upper Miocene (11.6 - 5.3 Ma)

• Basal conglomerates of the Iça Formation (=Acre Conglomerate Member of the Madre de Dios Formation in Peru), western Amazon Basin. The conglomerate is separated from the underlying Solimoes Formation (=Contamana Group, in part, in Peru) by the Ucayali Unconformity of Kummel (1948) (Campbell et al., 2006, 2010). The basal conglomerates of the Iça Formation are stratigraphically below an ash horizon in that formation located in Peru ~250 km to the southeast that has been 40A/39Ar dated to 9.01±0.28 (Campbell et al., 2001) The age of the fossils from the conglomerate is, therefore, presumed to be late Miocene, or Chasicoan/Huayquerian SALMA.

• member-level stratigraphic resolution

Environment/lithology: fluvial; lithified, black conglomerate

Size class: macrofossils

Collected by G. G. Simpson and L. I. Price in 1956

Primary reference: C. D. Frailey and K. E. Campbell. 2012. Two New Genera of Peccaries (Mammalia, Artiodactyla, Tayassuidae) from Upper Miocene Deposits of the Amazon Basin. Journal of Paleontology 86(5):852-877 [C. Jaramillo/G. Ballen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 137876: authorized by Carlos Jaramillo, entered by Gustavo Ballen on 31.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Artiodactyla - Tayassuidae
Sylvochoerus woodburnei n. gen. n. sp.
Sylvochoerus woodburnei n. gen. n. sp. Frailey and Campbell 2012 peccary
AMNH 55811 (holotype)