Auca Mahuevo theropod site (Cretaceous to of Argentina)

Also known as Aucasaurus holotype site

Where: Neuquén, Argentina (37.9° S, 68.5° W: paleocoordinates 40.8° S, 53.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Anacleto Formation (Neuquén Group), Early/Lower Campanian to Early/Lower Campanian (83.5 - 70.6 Ma)

• now Río Colorado Subgroup; 25 m above egg-bed 4. Pubis found a few meters above Aucasaurus skeleton, but during same excavation. Post-C33R interval

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - small; gray, green mudstone and sandstone

• "this bed appears to represent a shallow water, lacustrine deposit based on the well-developed laminae and the presence of freshwater arthropods."
• "The new specimen described here was found in an unusual laminated unit, composed of varves of unknown periodicity of greenish gray mudstone and very fine-grained sandstone about 70 m above the base of the section near the top of the exposures of the Anacleto Member."

Size classes: macrofossils, mesofossils

Preservation: soft parts

Collection methods: quarrying, mechanical,

Primary reference: R. A. Coria and L. M. Chiappe. 2000. Un nuevo terópodo abelisaurio de la Fm. Río Colorado (Cretácico Superior) de la Provincia del Neuquén [A new abelisaur theropod from the Río Colorado Fm. (Upper Cretaceous) of Neuquén province]. Actas XVI Jornadas Argentinas de Paleontología de Vertebrado, San Luis, Argentina 13 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28461: authorized by Matthew Carrano, entered by Matthew Carrano on 14.02.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda - Abelisauridae
Aucasaurus garridoi n. gen. n. sp.2
Aucasaurus garridoi n. gen. n. sp.2 Coria et al. 2002 ceratosaur
 Theropoda -
Allosauroidea indet.1
Allosauroidea indet.1 Currie and Zhao 1994 allosauroid
MCF-PVPH-418
unclassified
  -
Arthropoda indet.2
Arthropoda indet.2 Latreille 1829
1Coria and Arcucci 2004; 2Coria et al. 2002