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Água Negra (Triassic of Brazil)

Also known as Unaysaurus type site

Where: Rio Grande do Sul, Brazil (29.6° S, 53.9° W: paleocoordinates 37.2° S, 16.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Ictidosauria other zone, Caturrita Formation (Rosario do Sul Group), Norian (221.5 - 205.6 Ma)

• upper layers of the Santa Maria 2 Sequence of the Santa Maria Supersequence, corresponding lithostratigraphically to the Caturrita Formation. Ictidosauria or Mammaliamorpha Assemblage Zone (= Jachaleria Interval)

•Caturrita was originally considered Carnian-Norian in age; however, recent recalibration of the Triassic timescale suggests a Norian age (e.g. Langer et al. 2010; Brusatte et al. 2010. Earth-Science Reviews 101:68-100)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; red conglomerate and brown, red, silty shale

• "the specimen was recovered from a reddish conglomerate, situated above a brownish to reddish shale with intercalated siltstone lenses"

Size class: macrofossils

Collected by Azevedo in 1998

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

Primary reference: A. W. A. Kellner and D. d. A. Campos. 2000. Brief review of dinosaur studies and perspectives in Brazil. Anais da Academia Brasileira de Ciências 72(4):509-538 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45513: authorized by Matthew Carrano, entered by Matthew Carrano on 27.10.2004

Creative Commons license: CC BY (attribution)