Passo São Borja (Permian of Brazil)

Where: Rio Grande do Sul, Brazil (30.5° S, 54.8° W: paleocoordinates 47.1° S, 33.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Assistencia Member (Irati Formation), Kungurian (279.3 - 272.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified shale

• Parana Basin. " [...] shallowest environment (probably ranging from 10 m to 80 m) [...] " (Soares, 2003).
• " [...] succession of shales and black siltites, both bituminous and non-bituminous. These fine grained siliciclastic facies interbed an up to 1 m thick carbonate bed. A 10-20 cm thick calcirudite layer occurs at the bottom of this bed, which grades upwards to 20 to 40 cm thick, fine grained calcarenite beds. These calcarenite beds show wave lamination and hummocky cross stratification (HCS) and would correspond to proximal tempestite deposits

•(Fig. 4; Della Fávera, 1987; Lavina et al., 1989, 1991).

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collection methods: Specimens are reposited in the collections of the Universidade Federal do Rio Grande do Sul, Porto Alegre (UFRGS).

Primary reference: I. D. Pinto. 1972. Permian Insects from the Parana Basin, South Brazil I. Mecoptera. Revista Brasileira de Geociencias 2(2):105-116 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 116120: authorized by Matthew Clapham, entered by Jered Karr on 05.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Pinto lists Mesosaurus brasiliensis as coming from this locality
Show authors, comments, and common names
Malacostraca
 Eumalacostraca -
Pygocephalomorpha indet.
Pygocephalomorpha indet. Beurlen 1930
originally "Pygocephalomorpha sp."; makes up the packstone the wing was found in
Insecta
 Mecoptera - Permochoristidae
Petromantis rieki n. sp.
Petromantis rieki n. sp. Pinto 1972 scorpionfly
UFRGS I5256
Arberiopsida
 Arberiales -
Glossopteris sp.
Glossopteris sp. Brongniart 1828