Also known as Paraná Basin

Where: São Paulo, Brazil (23.1° S, 47.7° W: paleocoordinates 44.6° S, 24.9° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Assistencia Member (Irati Formation), Artinskian (290.1 - 279.3 Ma)

• Rossmann (2000) states that the fossils come from the Irati Formation but only gives "Lower Permian" as the most precise age specification. However, in a quite recent publication it is stated that the Irati Formation is Artinskian in age, based on absolute ages obtained from zircons from a bentonite layer (Santos et al., 2006, Gondwana Res. 9). Preservation in limestone suggests that the fossils come from the Assistência Member of the Irati Fm. (see Santos et al., 2009, J. S. Am. Earth Sci., Article in Press, doi:10.1016/j.jsames.2008.12.002).

• bed-level stratigraphic resolution

Environment/lithology: white, yellow limestone

Size class: macrofossils

Reposited in the SMF

• SMF = Senckenberg Museum, Frankfurt/Main

Primary reference: T. Rossmann. 2000. Studien an Mesosauriern (Amniota inc sed: Mesosauridae): 2 Neue Erkenntnisse zur Anatomie, mit Berücksichtigung der Taxonomie von Mesosaurus pleurogaster (Seeley). Senckenbergiana lethaea 80(1):13-28 [J. Mueller/T. Liebrecht/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90358: authorized by Johannes Mueller, entered by Torsten Liebrecht on 17.07.2009

Creative Commons license: CC BY (attribution)