Evolution of vision and hearing modalities in theropod dinosaurs

  title={Evolution of vision and hearing modalities in theropod dinosaurs},
  author={Jonah N. Choiniere and James M. Neenan and Lars Schmitz and David P. Ford and Kimberley E. J. Chapelle and Amy M. Balanoff and Justin S. Sipla and Justin A. Georgi and Stig A. Walsh and Mark A. Norell and Xing Xu and James M. Clark and Roger B. J. Benson},
  pages={610 - 613}
Revealing behavioral secrets in extinct species Extinct species had complex behaviors, just like modern species, but fossils generally reveal little of these details. New approaches that allow for the study of structures that relate directly to behavior are greatly improving our understanding of the lifestyles of extinct animals (see the Perspective by Witmer). Hanson et al. looked at three-dimensional scans of archosauromorph inner ears and found clear patterns relating these bones to complex… 
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Neurosensory anatomy of Varanopidae and its implications for early synapsid evolution.
Computed tomography data reveal that the neuroanatomy of pelycosaur-grade synapsids is far more complex than previously anticipated, and reconstructed neurosensory anatomy indicates that varanopids may have a much lower-frequency hearing range compared to more derivedsynapsids.
New digital braincase endocasts of two species of Desmatosuchus and neurocranial diversity within Aetosauria (Archosauria: Pseudosuchia).
The detailed study of the isolated braincases from the UCMP collection allowed us to assign them at the species-level and recognize two species of Desmatosuchus for the Placerias Quarry: D. spurensis and D. smalli.
Revisiting Russell’s troodontid: autecology, physiology, and speculative tool use
Dale Russell described the osteology, morphology, and ecology of the small theropod “Stenonychosaurus inequalis” in two papers, speculating on its life habits, brain power, vision, movement, feedin...
Dinosaurs were night prowlers, study finds
Fossil scans reveal desert bird dinosaur was moonlight predator with excellent night vision and hearing Fossil scans reveal desert bird dinosaur was moonlight predator with excellent night vision and


The Evolution and Fossil History of Sensory Perception in Amniote Vertebrates
There is no definitive evidence for a relationship between sensory evolution and species diversification, but it cannot be excluded, however, that selection for improved sensing was partially triggered by biotic interactions, e.g., in the context of niche competition, whereas ecospace expansion might also have played an important role.
Inner ear anatomy is a proxy for deducing auditory capability and behaviour in reptiles and birds
The results suggest that ECD length can be used to predict mean hearing frequency and range in fossil taxa, and that this measure may also predict vocal complexity and large group sociality given comprehensive datasets.
Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology
It is shown that the eyes of Mesozoic archosaurs were adapted to all major types of diel activity (that is, nocturnal, diurnal, and cathemeral) and provide concrete evidence of temporal niche partitioning in the Mesozoics.
Audiogram, body mass, and basilar papilla length: correlations in birds and predictions for extinct archosaurs
It is suggested that hearing in large dinosaurs was restricted to low frequencies with a high-frequency limit below 3 Hz, based on the regression analysis of two significant correlations in living archosaurs.
Comparative analysis of vestibular ecomorphology in birds
The hypothesis that the lengths, streamlines and angles between the semicircular canals are related to body size, wing kinematics and flying style in birds is tested and a link between visual acuity and proportional size of the labyrinth among birds is tentatively indicated.
Evolution of olfaction in non-avian theropod dinosaurs and birds
The results show that, rather than decreasing, the importance of olfaction actually increased during early bird evolution, representing a previously unrecognized sensory enhancement.
A Short History of Nearly Every Sense-The Evolutionary History of Vertebrate Sensory Cell Types.
  • G. Schlosser
  • Medicine, Biology
    Integrative and comparative biology
  • 2018
It is proposed that the evolution of novel cranial sense organs in vertebrates involved the redeployment of evolutionarily ancient sensory cell types for building larger and more complex sense organs.
Convergent evolution of bird-mammal shared characteristics for adapting to nocturnality
This work uses a newly developed molecular phyloecological approach to reconstruct the diel activity pattern of the common ancestors of living birds, and suggests that they had adaptations to nocturnality during their early evolution, which is remarkably similar to that of ancestral mammals.
Competition and constraint drove Cope's rule in the evolution of giant flying reptiles
70 million years of highly constrained early evolution is shown, followed by almost 80 millions years of sustained, multi-lineage body size increases in pterosaurs, suggesting that evolutionary competition can act as a macroevolutionary driver on extended geological timescales and supporting controversial hypotheses of bird–pterosaur competition.
Evolution of the Vertebrate Ear
This chapter introduces some major concepts from the world of paleontology, starting with some of the techniques used to investigate fossils and a basic description of the embryonic origin of skull and braincase anatomy.