General Roca, Rio Negro (MACN) (Cretaceous to of Argentina)

Where: Río Negro, Argentina (39.1° S, 67.7° W: paleocoordinates 42.1° S, 52.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• formation assignment questionable; Río Colorado Subgroup. Egg from the lower part of the "classic Rocanian locality of General Roca"

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; fine-grained, gray, red sandstone and coarse-grained, concretionary, brown, red, calcareous sandstone

• "very light grey, fine sandstone with light grey and pink patches, 2.3 m thick."

Size classes: macrofossils, mesofossils

Collected by R. Wichmann in 1912-1916; reposited in the MACN

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

Primary reference: F. v. Huene. 1929. Los sauriquios y ornitisquios del Cretáceo argentino. Anales del Museo de La Plata, serie 2 3:1-196 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51580: authorized by Matthew Carrano, entered by Matthew Carrano on 08.06.2005, edited by Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
  -
Gastropoda indet.3 Cuvier 1797 snail
Reptilia
 Testudines -
"Chelonii indet." = Testudines1
"Chelonii indet." = Testudines1 Batsch 1788 turtle
 Dinosauria -
Dinosauria indet.2 dinosaur
egg (MACN specimen)
 Saurischia -
Titanosaurus sp.3 Lydekker 1877 sauropod
MACN 5017
Antarctosaurus wichmannianus n. gen. n. sp. Huene 1927 sauropod
MACN 6904