Where: Rio Grande do Sul, Brazil (29.7° S, 52.9° W: paleocoordinates 37.0° S, 15.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Ictidosauria zone, Caturrita Formation (Rosário do Sul Group), Norian (228.0 - 208.5 Ma)

• upper layers of the Santa Maria 2 Sequence of the Santa Maria Supersequence, corresponding lithostratigraphically to the Caturrita Formation. Ictidosauria or Mammaliamorpha Assemblage Zone (= Jachaleria Interval)

•

•Caturrita was originally considered Carnian-Norian in age; however, recent recalibration of the Triassic timescale suggests a Norian age (e.g. Langer et al. 2010; Brusatte et al. 2010. Earth-Science Reviews 101:68-100)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: M. B. Soares, C. L. Schultz, and B. I. D. Horn. 2011. New information on Riograndia guaibensis Bonaparte, Ferigolo & Ribeiro, 2001 (Eucynodontia, Tritheledontidae) from the Late Triassic of southern Brazil: anatomical and biostratigraphic implications. Anais da Academia Brasileira de Ciências 83(1):329-354 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 97203: authorized by Richard Butler, entered by Richard Butler on 19.07.2010

Creative Commons license: CC BY (attribution)