Rincão dos Weiss (Triassic to of Brazil)

Also known as Rincao dos Weiss; holotype site of Procolophon brasiliensis

Where: Rio Grande do Sul, Brazil (29.6° S, 54.4° W: paleocoordinates 49.1° S, 23.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Sanga do Cabral Formation (Rosario do Sul Group), Induan to Induan (252.2 - 247.2 Ma)

• The Sanga do Cabral Fm. is correlated with the "impoverished zone" (Procolophon subzone) of the Lystrosaurus Assemblage Zone of the Main Karoo Basin of South Africa by some authors on the basis of the abundant records of Procolophon, i.e., it is Upper Induan to Lower Olenekian in age (see Dias-da-Silva et al., 2006, Can. J. Earth Sci. and references therein). However, Langer et al. (2007; New Mexico Mus. Nat. Hist. Sci. Bull. 41) pointed out that the prevalence of Procolophon in the Brazilian sequence might represent a taphonomic bias, and that only an undifferentiated Lower Triassic age is currently possible.

•The Sanga do Cabral Fm. belongs to the Rosario do Sul Group according to various authors (e.g., Langer et al. 2007, New Mexico Mus. Nat. Hist. Sci. Bull. 41).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; massive conglomerate and tabular sandstone

• "It [the Sanga do Cabral Fm.] consists of massive to trough cross-bedded intraformational conglomerates and horizontally bedded sandstones, which are interpreted as being deposited by braided river systems which poorly confined channels that developed on a low-gradient alluvial plain. [...] The intraformational conglomerates are the bone-bearing beds, [...]." (Dias-da-Silva et al., 2006).

Size class: macrofossils

Collected by Fundação Zoobotânica do Rio Grande do Sul in 1997

Collection methods: mechanical,

• MCN PV = vertebrate paleontology collections of the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, Porto Alegre

•UFRGS PV = vertebrate paleontology collections of the Universidade Federal do Rio Grande do Sul, Porto Alegre

•MCT/PUCRS = Museu de Ciência e Technologia da Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre

Primary reference: J. C. Cisneros and C. L. Schultz. 2002. Procolophon brasiliensis n. sp., a new procolophonid reptile from the Lower Triassic of southern Brazil. Neues Jahrbuch für Geologie und Paläontologie Monatshefte 2002(11):641-648 [J. Mueller/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 93720: authorized by Johannes Mueller, entered by Torsten Liebrecht on 29.01.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

 Procolophonia - Procolophonidae
Procolophon sp., "Procolophon brasiliensis n. sp." = Procolophon trigoniceps
Procolophon sp. Owen 1876 parareptile
UFRGS PV 9252 T, 0494 T, 0498 T; MCT/PUCRS 3790; one partial skull and 3 vertebrae of large individuals, not found associated
"Procolophon brasiliensis n. sp." = Procolophon trigoniceps Owen 1876 parareptile
MCN PV 1905 (type)