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Talismã, upper Purus River (Miocene of Brazil)

Where: Amazonas, Brazil (8.8° S, 68.8° W: paleocoordinates 9.1° S, 66.8° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Solimões Formation, Tortonian (11.6 - 7.2 Ma)

• "Latrubesse et al. (2007) suggested a Late Miocene age for the Solimo ̃es Formation. The snake material we studied was collected at the Talisma ̃ locality, which is considered by some authors as belonging to the Huayquerian- Montehermosan (Late Miocene/Pliocene) because of the presence of the rodents Potamarchus murinus and Neopliblema horridula (Santos et al., 1993; Negri, 2004). According to Santos and Negri (1993), the faunal set of xenarthrans (Tardigrada) suggests, on one hand, a probable affinity with the fauna of the Santacrucian Age of Argentina (Early-Middle Miocene) and, on the other, a relation with the Laventan Age of Colombia (Middle Miocene). According to Negri (2004; unpubl. data), the faunistic association of Tardigrada in this locality would indicate an older age, correlatable and close to the Laventan (13.5–11.8 Ma, Madden et al., 1997). Here, we follow the arguments of Latrubesse et al. (2007) and assume a probable Late Miocene age for the Solimo ̃es Formation." (Hsiou and Albino, 2009:613)

Environment/lithology: fluvial-lacustrine; lithified, gypsiferous, muddy, silty mudstone and claystone

• dominated by fine sediments, mainly silts and clays, with gypsum and calcite veins in the lower part and manganese stains in the upper part, both probably diagenetic.

•"The section is dominated by fine sediments, mainly silts and clays, with gypsum and calcite veins in the lower part and manganese stains in the upper part, both probably digenetic. The deposits are characterized by massive bedding with no evident lamination. Two fossiliferous levels were found at 1.7 and 7 m above water level " (Hsiou and Albino, 2009:612).

Size class: macrofossils

Collected by Universidade Federal do Acre (UFAC) and Universidade Federal de Rondonia (UNIR) in 2003

Collection methods: surface (float), ,

Primary reference: M. A. Cozzuol. 2006. The Acre vertebrate fauna: Age, diversity, and geography. Journal of South American Earth Sciences 21:185-203 [M. Uhen/M. Uhen] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 67386: authorized by Mark Uhen, entered by Mark Uhen on 17.11.2006, edited by Jason Head, Evangelos Vlachos and Juan Carrillo

Creative Commons license: CC BY (attribution)