Where: Portugesa, Venezuela (9.0° N, 70.1° W: paleocoordinates 8.2° N, 66.7° W)
• coordinate estimated from map
When: Santacrucian to Friasian mammal zone, Rio Yuka Formation, Burdigalian (20.4 - 16.0 Ma)
Environment/lithology: marine; sandstone
• In agreement with the vertebrate assemblage here described, the Rio Yuca Formation is usually considered as a molasse unit that was deposited during the initial phases of the Andean uplift in continental and tropical environments. Adinotherium suggests the presence of open habitats, while the peltephilid is indicative of a mixture of open and relatively closed environments. The presence of the two freshwater fishes, plus the giant Purussaurus, indicates the presence of rivers or lakes in the vicinity of the study area.
• The Rı ́o Yuca Formation outcrops (Fig. 1(c)) commonly consist of violet, yellow and light red paleosoils, with decameter- thick layers of lenticular sandstones. The sandstones represent repeated graded cycles in a single package, with gravel at the base. At the top of one of these lenticular packages were localized concentrations of bone fragments herein described, plus phosphatized coprolites and a centimeter-thick rhizoconcretion horizon. Fragments of turtle carapace and cetacean vertebrae were also recovered in the lower beds of the Rio Yuca Formation.
Size class: macrofossils
Collection methods: IVIC-P, Coleccion de Paleontologia, Instituto Venezolano de Investigaciones Cientificas, Caracas, Venezuela.
Primary reference: A. D. Rincon, A. Solorzano, O. Macsotay, H. G. McDonald, and M. Nunez-Flores. 2016. A new Miocene vertebrate assemblage from the Rio Yuca Formation (Venezuela) and the northernmost record of typical Miocene mammals of high latitude (Patagonian) affinities in South America. Geobios 49:395-405 [E. Vlachos/E. Vlachos]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 190535: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 10.12.2017
Creative Commons license: CC BY (attribution)
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