A New Upper Cretaceous Titanosaur Nesting Site From La Rioja (nw Argentina), With Implications For Titanosaur Nesting Strategies

dc.creatorHechenleitner
dc.creatorE. Martin; Fiorelli
dc.creatorLucas E.; Grellet-Tinner
dc.creatorGerald; Leuzinger
dc.creatorLea; Basilici
dc.creatorGiorgio; Taborda
dc.creatorJeremias R. A.; De la Vega
dc.creatorSergio R.; Bustamante
dc.creatorCarlos A.
dc.date2016
dc.datemaio
dc.date2017-11-13T11:33:47Z
dc.date2017-11-13T11:33:47Z
dc.date.accessioned2018-03-29T05:48:07Z
dc.date.available2018-03-29T05:48:07Z
dc.identifierPalaeoecology. Wiley-blackwell, v. 59, p. 433 - 446, 2016.
dc.identifier0031-0239
dc.identifier1475-4983
dc.identifierWOS:000374647700008
dc.identifier10.1111/pala.12234
dc.identifierhttp://onlinelibrary-wiley-com.ez88.periodicos.capes.gov.br/doi/10.1111/pala.12234/full
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/326323
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1363329
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCretaceous titanosaur nesting sites are currently known only from Europe, Asia and South America. In the latter, only the Auca Mahuevo and Sanagasta nesting sites have been confidently assigned to this clade of sauropod dinosaurs. Here we report the discovery of the first eggs and egg clutches found at Tama, a new Upper Cretaceous fossiliferous locality in the Los Llanos Formation, Sierra de Los Llanos (La Rioja, NW Argentina). At least five egg clutches, several partially preserved, isolated eggs and many eggshell fragments were discovered in a single outcrop of a sandstone horizon which represents a cumulative palaeosol profile. Although the mechanical and digital preparation of eggs did not reveal any embryonic remains in ovo, the morphology of the eggs and eggshells closely matches that of titanosaur eggs and eggshells found worldwide. The morphology and spatial grouping of the titanosaur eggs from Tama, along with geological observations support a burrow-nesting strategy for these dinosaurs. Although the Sanagasta and Tama eggs were found in the same stratigraphical unit and share several morphological characters, they clearly differ in shell thickness and egg size. This, coupled with the interpretation of different sedimentary contexts for these nesting sites, strongly suggests that at least two different titanosaur species nested in La Rioja during the Late Cretaceous, using different nesting strategies. The occurrence of this new titanosaur nesting site in a semiarid palaeoenvironment represents an interesting case study for the reproductive biology of the titanosaur dinosaurs, particularly their labile nesting behaviour.
dc.description59
dc.description3
dc.description433
dc.description446
dc.descriptionCONICET
dc.descriptionJurassic Foundation
dc.descriptionAgencia Nacional de Promocion Cientifica y Tecnologica [PICT 2012-0421]
dc.descriptionFAPESP [2012/23209-0]
dc.descriptionMunicipio A. V. Penaloza, La Rioja
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageEnglish
dc.publisherWiley-Blackwell
dc.publisherHoboken
dc.relationPalaeoecology
dc.rightsfechado
dc.sourceWOS
dc.subjectTama
dc.subjectDinosaur Eggs
dc.subjectBurrow-nesting
dc.subjectNesting Behaviour
dc.titleA New Upper Cretaceous Titanosaur Nesting Site From La Rioja (nw Argentina), With Implications For Titanosaur Nesting Strategies
dc.typeArtículos de revistas


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