Guillermo Navalón
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View article: Developmental underpinnings of morphological disparity in the avian bony palate
Developmental underpinnings of morphological disparity in the avian bony palate Open
The deepest phylogenetic divergence in crown birds gave rise to Palaeognathae and Neognathae, clades exhibiting divergent bony palate morphologies. This observation led to the longstanding hypothesis that the distinctive palate arrangement…
View article: Shouldering the challenge of deciphering avian palate evolution
Shouldering the challenge of deciphering avian palate evolution Open
Wilken et al. (1) investigate the evolution of avian palatal kinesis using comparative morphology and biomechanical modelling. While the study’s topic and approach are timely, its conclusions are marred by inadequate taxon sampling and mor…
View article: Whence the birds: 200 years of dinosaurs, avian antecedents
Whence the birds: 200 years of dinosaurs, avian antecedents Open
Among the most revolutionary insights emerging from 200 years of research on dinosaurs is that the clade Dinosauria is represented by approximately 11 000 living species of birds. Although the origin of birds among dinosaurs has been revie…
View article: Cretaceous bird from Brazil informs the evolution of the avian skull and brain
Cretaceous bird from Brazil informs the evolution of the avian skull and brain Open
A dearth of Mesozoic-aged, three-dimensional fossils hinders understanding of the origin of the distinctive skull and brain of modern (crown) birds 1 . Here we report Navaornis hestiae gen. et sp. nov., an exquisitely preserved fossil spec…
View article: Paleoneurology of stem palaeognaths clarifies the plesiomorphic condition of the crown bird central nervous system
Paleoneurology of stem palaeognaths clarifies the plesiomorphic condition of the crown bird central nervous system Open
Lithornithidae, an assemblage of volant Palaeogene fossil birds, provide our clearest insights into the early evolutionary history of Palaeognathae, the clade that today includes the flightless ratites and volant tinamous. The neotype spec…
View article: Macroevolutionary drivers of morphological disparity in the avian quadrate
Macroevolutionary drivers of morphological disparity in the avian quadrate Open
In birds, the quadrate connects the mandible and skull, and plays an important role in cranial kinesis. Avian quadrate morphology may therefore be assumed to have been influenced by selective pressures related to feeding ecology, yet large…
View article: The role of recent speciation in present-day patterns of tetrapod phylogenetic relatedness
The role of recent speciation in present-day patterns of tetrapod phylogenetic relatedness Open
Aim: Biodiversity is distributed unevenly among lineages and regions, and understanding the processes generating these global patterns is a central goal in evolutionary research, particularly in light of the current biodiversity crisis. He…
View article: Macroevolutionary drivers of morphological disparity in the avian quadrate
Macroevolutionary drivers of morphological disparity in the avian quadrate Open
In birds, the quadrate bone acts as a hinge between the lower jaw and the skull, playing an important role in cranial kinesis. As such, the evolution of avian quadrate morphology may plausibly be assumed to have been influenced by selectiv…
View article: A new enantiornithine specimen from the Lower Cretaceous of Las Hoyas: avifaunal diversity and life-history of a wetland Mesozoic bird
A new enantiornithine specimen from the Lower Cretaceous of Las Hoyas: avifaunal diversity and life-history of a wetland Mesozoic bird Open
The Lower Cretaceous fossil site of Las Hoyas (Cuenca, Spain) has yielded the richest Cretaceous avifauna of the European continent. We describe a new fossil (MUPA-LH-33333) of an enantiornithine bird from this locality. This specimen cons…
View article: Fossil basicranium clarifies the origin of the avian central nervous system and inner ear
Fossil basicranium clarifies the origin of the avian central nervous system and inner ear Open
Among terrestrial vertebrates, only crown birds (Neornithes) rival mammals in terms of relative brain size and behavioural complexity. Relatedly, the anatomy of the avian central nervous system and associated sensory structures, such as th…
View article: Sinking a giant: quantitative macroevolutionary comparative methods debunk qualitative assumptions
Sinking a giant: quantitative macroevolutionary comparative methods debunk qualitative assumptions Open
Myhrvold et al. 1 suggest that our inference of subaqueous foraging among spinosaurids 2 is undermined by selective bone sampling, inadequate statistical procedures, and use of inaccurate ecological categorizations. Myhrvold et al. 1 ignor…
View article: SI File 1. from Fossil basicranium clarifies the origin of the avian central nervous system and inner ear
SI File 1. from Fossil basicranium clarifies the origin of the avian central nervous system and inner ear Open
Specimens used in this study, angles, body mass and sources
View article: Beyond the beak: Brain size and allometry in avian craniofacial evolution
Beyond the beak: Brain size and allometry in avian craniofacial evolution Open
Birds exhibit an enormous variety of beak shapes. Such remarkable variation, however, has distracted research from other important aspects of their skull evolution, the nature of which has been little explored. Key aspects of avian skull v…
View article: Quantitative Analysis of Morphometric Data of Pre-modern Birds: Phylogenetic Versus Ecological Signal
Quantitative Analysis of Morphometric Data of Pre-modern Birds: Phylogenetic Versus Ecological Signal Open
Birds are one of the most diverse clades of extant terrestrial vertebrates, a diversity that first arose during the Mesozoic as a multitude of lineages of pre-neornithine (stem) birds appeared but did not survive into the Cenozoic Era. Mod…
View article: Craniofacial development illuminates the evolution of nightbirds (Strisores)
Craniofacial development illuminates the evolution of nightbirds (Strisores) Open
Evolutionary variation in ontogeny played a central role in the origin of the avian skull. However, its influence in subsequent bird evolution is largely unexplored. We assess the links between ontogenetic and evolutionary variation of sku…
View article: Navalon et al Craniofacial development and nightbird evolution
Navalon et al Craniofacial development and nightbird evolution Open
Supporting data for the publication Navalon et al Craniofacial development illuminates the evolution of nightbirds (Strisores)
View article: Supplementary Dataset 1. from Craniofacial development illuminates the evolution of nightbirds (Strisores)
Supplementary Dataset 1. from Craniofacial development illuminates the evolution of nightbirds (Strisores) Open
List of specimens, variables and taxonomic and ontogenetic categories.
View article: Morphological Disparity of the Humerus in Modern Birds
Morphological Disparity of the Humerus in Modern Birds Open
From a functional standpoint, the humerus is a key element in the skeleton of vertebrates as it is the forelimb’s bone that connects with the pectoral girdle. In most birds, the humerus receives both the forces exerted by the main flight m…
View article: Supporting data for Navalon et al. 2019 Bird cranial integration
Supporting data for Navalon et al. 2019 Bird cranial integration Open
Supplementary data for Navalon et al 2019 The consequences of craniofacial integration on the adaptive radiations of Darwin’s Finches and Hawaiian Honeycreepers.
View article: The evolutionary relationship among beak shape, mechanical advantage, and feeding ecology in modern birds*
The evolutionary relationship among beak shape, mechanical advantage, and feeding ecology in modern birds* Open
Extensive research on avian adaptive radiations has led to a presumption that beak morphology predicts feeding ecology in birds. However, this ecomorphological relationship has only been quantified in a handful of avian lineages, where ass…