estancia Laguna Palacios (Cretaceous to of Argentina)

Also known as Aniksosaurus type

Where: Chubut, Argentina (44.8° S, 69.2° W: paleocoordinates 51.5° S, 46.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lower Member (Bajo Barreal Formation), Cenomanian to Cenomanian (100.5 - 89.8 Ma)

• ca. 15 m from bottom of Lower Member (49 m total thickness)

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; fine-grained, quartzose, intraclastic, green sandstone and tuff

• "deposition by a unidirectional, low-energy, overbank fluvial deposit, specifically a floodplain deposit produced by the lateral migrating fluvial channel. A fluvial environment is additionally indicated by the superposition of sandstone tabular bodies with coarse sandstones and tuff interclasts."
• "volcanic tuff"; Ibiricu et al 2013: "fine, quartzose sandstone with clay intraclasts in a horizon with an unconformable base and parallel lamination"

•"sandstone"; Ibiricu et al 2013: "The specimens were embedded in a fining-upward, green sandstone, with an uncomfortable lower contact"

Size class: macrofossils

Collected by R. D. Martínez

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

Primary reference: R. D. Martínez and F. E. Novas. 1997. Un nuevo tetanuro (Dinosauria: Theropoda) de la Formación Bajo Barreal (Cretácico Superior), Patagonia [A new tetanuran (Dinosauria: Theropoda) from the Bajo Barreal Formation (Upper Cretaceous), Patagonia]. Ameghiniana 34(4):538 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 70674: authorized by Matthew Carrano, entered by Matthew Carrano on 02.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

 Saurischia -
Sarmientosaurus musacchioi n. gen. n. sp.1 Martínez et al. 2016 sauropod
 Avetheropoda - Compsognathidae
Aniksosaurus darwini n. gen. n. sp.2
Aniksosaurus darwini n. gen. n. sp.2 Martínez and Novas 2006 compsognathid
"intermediate between basal tetanurans and Coelurosauria" but "probably a true coelurosaur"