Marchezan, São João do Polêsine (Triassic of Brazil)

Where: Rio Grande do Sul, Brazil (29.6° S, 53.5° W: paleocoordinates 42.4° S, 14.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hyperodapedon zone, Santa Maria Formation (Rosário do Sul Group), Tuvalian (232.0 - 221.5 Ma)

• Santa Maria Formation, Candelária Sequence, Paraná Basin

Environment/lithology: lacustrine delta plain; mudstone

• "The lithofacies at the Marchezan site consists of nonlaminated to finely laminated reddish mudstones, with sandstone lenses, similar to other outcrops of the Hyperodapedon AZ (Zerfass et al. 2003). In addition, there are rhythmites and sigmoidal massive to climbing cross-laminated sandstone bodies." (Pacheco et al. 2018)

Size class: macrofossils

Primary reference: C. P. Pacheco, A. G. Martinelli, A. E. B. Pavanatto, M. B. Soares, and S. Dias-da-Silva. 2018. Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy. Historical Biology 30(4):475-485 [A. Dunhill/B. Allen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 196709: authorized by Alex Dunhill, entered by Bethany Allen on 01.10.2018, edited by Graeme Lloyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Rhynchosauria - Rhynchosauridae
Hyperodapedon sp.
Hyperodapedon sp. Huxley 1859 rhynchosaur
 Theropoda - Herrerasauridae
Gnathovorax cabreirai n. gen. n. sp.
Gnathovorax cabreirai n. gen. n. sp. Pacheco et al. 2019 herrerasaurid
CAPPA/UFSM 0009
Osteichthyes
 Therapsida -
Prozostrodon brasiliensis
Prozostrodon brasiliensis Barberena et al. 1987 cynodont
CAPPA/UFSM 0123, right lower jaw