10.5061/DRYAD.F5F1T
Hechenleitner, E. Martin
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Fiorelli, Lucas E.
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Grellet-Tinner, Gerald
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Leuzinger, Léa
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Basilici, Giorgio
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Taborda, Jeremías R. A.
Bernardino Rivadavia Natural Sciences Museum
de la Vega, Sergio R.
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Bustamante, Carlos A.
Centro Regional de Investigaciones Científicas y Transferencia
Tecnológica de La Rioja (CRILAR-CONICET); Entre Ríos y Mendoza s/n. 5301
Anillaco La Rioja Argentina
Data from: A new Upper Cretaceous titanosaur nesting site from La Rioja
(NW Argentina), with implications for titanosaur nesting strategies
Dryad
dataset
2017
dinosaur eggs
nesting behaviour
burrow-nesting
Tama
2017-01-29T00:00:00Z
2017-01-29T00:00:00Z
en
https://doi.org/10.1111/pala.12234
27184198 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Cretaceous 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.
CT scan renderings of the jacket #2 of CRILAR-Pv 530/1The video shows a 3D
reconstruction of the 5 eggs present in the jacket #2 of CRILAR-Pv 530/1.
In addition, it is shown in detail an external and internal view of e1.
Inside it, the slices show several cracks that are normal to the bedding
plane and describe a slightly concentric
pattern.Hechenleitner_et_al_2016_VS1.mp4