Mansilla II (egg level 3) (Cretaceous to of Argentina)

Where: Río Negro, Argentina (40.0° S, 66.6° W: paleocoordinates 42.8° S, 52.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Middle Member (Allen Formation), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• "Egg level 3"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone and mudstone

• "Interpreted as reflecting brackish lagoonal and supratidal environments, associated with aeolian sands (dunes) and deposits of ephemeral rivers"
• Unit 1: "A thick succession of sandstones and mudstones, with intercalations of carbonate and evaporitic rocks" "fine-grained sandy deposits with subordinate muddy layers and two thin evaporitic levels" and Unit 2: "a thick succession of siltstone and mudstone deposits with thin intercalations of ostracod-rich limestones and sandy levels"

Size class: macrofossils

• Abundant T2B Megaloolithidae indet. eggshells

Preservation: replaced with calcite

Collected in October-December 2003

• Eggshells cleaned using ultrasound

Primary reference: L. Salgado, R. A. Coria, C. M. Magalhaes Ribeiro, A. Garrido, R. Rogers, M. E. Simon, A. B. Arcucci, K. Curry Rogers, A. Paulina Carabajal, S. Apesteguia, M. Fernandez, R. A. Garcia, and M. Talevi. 2007. Upper Cretaceous dinosaur nesting sites of Rio Negro (Salitral Ojo de Agua and Salinas de Trapalco-Salitral de Santa Rosa), northern Patagonia, Argentina. Cretaceous Research 28(3):392-404 [M. Carrano/M. Carrano/F. Aspromonte]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96098: authorized by Matthew Carrano, entered by Matthew Carrano on 17.05.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Saurischia - Titanosauridae
Megaloolithus jabalpurensis
Megaloolithus jabalpurensis Khosla and Sahni 1995 titanosaurid
eggshells; MML-PV 37
  - Fusioolithidae
Fusioolithus baghensis
Fusioolithus baghensis Khosla and Sahni 1995 dinosaur