Where: La Rioja, Argentina (29.9° S, 67.7° W: paleocoordinates 49.9° S, 37.6° W)

• coordinate stated in text

When: Chañares Formation (Agua de la Peña Group), Ladinian (242.0 - 237.0 Ma)

• The Chañares Formation is dated as Ladinian (Rogers et al. 2001) or Ladinian–earliest Carnian (Desojo et al. 2011) based on vertebrate biostratigraphy and a minimum age constraint based on radioisotopic dating of the lower levels of the overlying Ischigualasto Formation (Rogers et al. 1993; Furin et al. 2006). The stratigraphic occurrence of the rhynchosaur specimens described here in the lowermost levels of the Chañares Formation means that it is very likely that they are of late Middle Triassic age.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: M. D. Ezcurra, M. J. Trotteyn, J. B. Desojo, L. E. Fiorelli, J. R. A. Raborda, M. B. Baczko, and M. Iberlucea. 2013. First rhynchosaur record from the Chañares Formation (Ladinian–earliest Carnian, Ischigualasto-Villa Union Basin) of northwestern Argentina. XXVII Jornadas Argentinas de Paleontología de Vertebrados. Resúmenes. Ameghiniana 50(4 (suppl.)):R15-R16 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 195243: authorized by Richard Butler, entered by Emma Dunne on 30.07.2018, edited by Bryan Gee

Creative Commons license: CC BY (attribution)