Passo das Tropas (Triassic of Brazil)

Where: Rio Grande do Sul, Brazil (29.7° S, 53.8° W: paleocoordinates 51.8° S, 18.8° W)

• coordinate estimated from map

When: Santa Maria Formation, Ladinian (242.0 - 237.0 Ma)

• Sommer et al (1985) argue for a T2 age, whereas Bortoluzz et al had previously believed a T3 age most likely - all based on floristic evidence and correlations

Environment/lithology: fluvial; sandstone and conglomerate

• Tectonically active small basins with an en echelon arrangement. Extensional basins are controlled by the structures of the Damara-Katanga-Mozambique (DKM) mobile belt. The South American branch of the Waterberg-Omaruru fault system (Namibia) is related to the Waterberg rift basin.

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Primary reference: I. D. Pinto. 1956. Artopods da Formacao Santa Maria (Triassico Superior) Do Rio Grande do Sul, com noticias sobre alguns restos vegetais. Boletim da Sociedade Brasileira de Geologia 5(1):75-87 [M. Clapham/J. Karr/J. Karr]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 116119: authorized by Matthew Clapham, entered by Jered Karr on 05.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Insecta
 Trichoptera -
Sanctipaulus mendesi n. gen. n. sp.
Sanctipaulus mendesi n. gen. n. sp. Pinto 1956 caddisfly
URGS 241
Branchiopoda
 Diplostraca - Lioestheriidae
Euestheria azambujai n. sp. Pinto 1956 clam shrimp
Estherites wianamatensis Mitchell 1927 clam shrimp
 Limnadioidea - Limnadiidae
Estheriina sp. Jones 1897 branchiopod
Peltaspermopsida
 Peltaspermales - Umkomasiaceae
Dicroidium sp. Gothan 1912
Pachypteris sp. Brongniart 1828
Pteruchus sp. Townrow 1962
Pinopsida
 Cordaitanthales -
Samaropsis sp. Goeppert 1864
Calamitaceae
  - Calamitaceae
Neocalamites sp. Halle 1908
Zuberia
  -
Zuberia sp. Frenguelli 1944