Lucas E. Fiorelli
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View article: Unexpected morphological variability in the eggshells of the South American caimans Caiman latirostris and Caiman yacare
Unexpected morphological variability in the eggshells of the South American caimans Caiman latirostris and Caiman yacare Open
Eggshell morphology is a valuable indicator of the local conditions within the nests of modern crocodilians and birds. In contrast to these latter, the anatomical structure of the eggshells of most crocodilian species is practically unknow…
View article: First titanosaur dinosaur nesting site from the Late Cretaceous of Brazil
First titanosaur dinosaur nesting site from the Late Cretaceous of Brazil Open
Titanosaurs were successful herbivorous dinosaurs widely distributed in all continents during the Cretaceous, with the major diversity in South America. The success of titanosaurs was probably due to several physiological and ecological fa…
View article: Parque Geológico Sanagasta (La Rioja, Argentina): Acciones de conservación y gestión del turismo
Parque Geológico Sanagasta (La Rioja, Argentina): Acciones de conservación y gestión del turismo Open
The geological‑paleontological heritage of a region represents a component on which tourist activ‑ ity can be based. The objective of this study is to show how the policies created at all levels of government directly or indirectly affect …
View article: Osteohistology and paleobiological inferences of proterochampsids (Eucrocopoda: Proterochampsia) from the Chañares Formation (late Ladinian–early Carnian), La Rioja, Argentina
Osteohistology and paleobiological inferences of proterochampsids (Eucrocopoda: Proterochampsia) from the Chañares Formation (late Ladinian–early Carnian), La Rioja, Argentina Open
Proterochampsids were a group of stem archosaurs from the Middle–Late Triassic of South America. Using for the first time in proterochampsids quantitative microanatomical and morphological data and an inference model, we analyze the micros…
View article: Osteohistology and paleobiological inferences of proterochampsids (Eucrocopoda: Proterochampsia) from the Chañares Formation (late Ladinian–early Carnian), La Rioja, Argentina
Osteohistology and paleobiological inferences of proterochampsids (Eucrocopoda: Proterochampsia) from the Chañares Formation (late Ladinian–early Carnian), La Rioja, Argentina Open
Proterochampsids were a group of stem archosaurs from the Middle–Late Triassic of South America. Using for the first time in proterochampsids quantitative microanatomical and morphological data and an inference model, we analyze the micros…
View article: The rhynchosaur record, including a new stenaulorhynchine taxon, from the Chañares Formation (upper Ladinian–?lowermost Carnian levels) of La Rioja Province, north-western Argentina
The rhynchosaur record, including a new stenaulorhynchine taxon, from the Chañares Formation (upper Ladinian–?lowermost Carnian levels) of La Rioja Province, north-western Argentina Open
Rhynchosaurs were quadrupedal, bulky herbivorous archosauromorph diapsids with a highly specialized dental apparatus. This group is restricted to the Triassic Period and became extremely abundant worldwide during the late Carnian, numerica…
View article: The Late Triassic Ischigualasto Formation at Cerro Las Lajas (La Rioja, Argentina): fossil tetrapods, high-resolution chronostratigraphy, and faunal correlations
The Late Triassic Ischigualasto Formation at Cerro Las Lajas (La Rioja, Argentina): fossil tetrapods, high-resolution chronostratigraphy, and faunal correlations Open
Present knowledge of Late Triassic tetrapod evolution, including the rise of dinosaurs, relies heavily on the fossil-rich continental deposits of South America, their precise depositional histories and correlations. We report on an extende…
View article: New Specimen Sheds Light on the Anatomy and Taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina
New Specimen Sheds Light on the Anatomy and Taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina Open
The lower Carnian levels of the Chañares Formation (Ischigualasto‐Villa Unión Basin, La Rioja Province) have yielded some of the most informative dinosaur precursor species known so far. However, these species are based on partial skeleton…
View article: Biomechanical evidence suggests extensive eggshell thinning during incubation in the Sanagasta titanosaur dinosaurs
Biomechanical evidence suggests extensive eggshell thinning during incubation in the Sanagasta titanosaur dinosaurs Open
The reproduction of titanosaur dinosaurs is still a complex and debated topic. Their Late Cretaceous nesting sites are distributed worldwide and their eggs display substantial morphological variations according to the parent species. In co…
View article: First Fish Remains from the Earliest Late Triassic of the Chañares Formation (La Rioja, Argentina) and Their Paleobiogeographic Implications
First Fish Remains from the Earliest Late Triassic of the Chañares Formation (La Rioja, Argentina) and Their Paleobiogeographic Implications Open
We hereby describe fish material collected from the lowermost Upper Triassic continental levels of the Chañares Formation (Campo de Córdoba and El Torcido localities). The specimens consist of a fragmentary dermal skull roof bone assigned …
View article: Micro-CT scan reveals an unexpected high-volume and interconnected pore network in a Cretaceous Sanagasta dinosaur eggshell
Micro-CT scan reveals an unexpected high-volume and interconnected pore network in a Cretaceous Sanagasta dinosaur eggshell Open
The Cretaceous Sanagasta neosauropod nesting site (La Rioja, Argentina) was the first confirmed instance of extinct dinosaurs using geothermal-generated heat to incubate their eggs. The nesting strategy and hydrothermal activities at this …
View article: A new Upper Cretaceous titanosaur nesting site from La Rioja (NW Argentina), with implications for titanosaur nesting strategies
A new Upper Cretaceous titanosaur nesting site from La Rioja (NW Argentina), with implications for titanosaur nesting strategies Open
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 …
View article: What do giant titanosaur dinosaurs and modern Australasian megapodes have in common?
What do giant titanosaur dinosaurs and modern Australasian megapodes have in common? Open
Titanosauria is a globally distributed clade of sometimes extremely large Mesozoic herbivorous sauropod dinosaurs. On the basis of current evidence these giant dinosaurs seem to have reproduced in specific and localized nesting sites. Howe…
View article: Archosauromorph Remains from the Tarjados Formation (Early—Middle Triassic, NW Argentina)
Archosauromorph Remains from the Tarjados Formation (Early—Middle Triassic, NW Argentina) Open
The Agua de la Peña Group of the Ischigualasto-Villa Unión Basin (northwestern Argentina) documents the evolution of archosauromorph assemblages in western Gondwana during the late Middle and Late Triassic. However, the South American arch…