Vocalization by extant nonavian reptiles: A synthetic overview of phonation and the vocal apparatus

@article{Russell2020VocalizationBE,
  title={Vocalization by extant nonavian reptiles: A synthetic overview of phonation and the vocal apparatus},
  author={Anthony Patrick Russell and Aaron M. Bauer},
  journal={The Anatomical Record},
  year={2020},
  volume={304},
  pages={1478 - 1528}
}
Among amniote vertebrates, nonavian reptiles (chelonians, crocodilians, and lepidosaurs) are regarded as using vocal signals rarely (compared to birds and mammals). In all three reptilian clades, however, certain taxa emit distress calls and advertisement calls using modifications of regions of the upper respiratory tract. There is no central tendency in either acoustic mechanisms or the structure of the vocal apparatus, and many taxa that vocalize emit only relatively simple sounds. Available… 
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References

SHOWING 1-10 OF 492 REFERENCES
Functional morphology of the Alligator mississippiensis larynx with implications for vocal production
TLDR
Morphology and laryngeal biomechanics are used to model the boundaries of the alligator's available acoustic space, providing a systematic description of the possible acoustic space that could be available to an alligator larynx.
A Chinese alligator in heliox: formant frequencies in a crocodilian
TLDR
Frequency peaks in bellows of a Chinese alligator breathing a helium–oxygen mixture instead of air shift to significantly higher frequencies, showing that crocodilian vocalizations contain vocal resonance frequencies or ‘formants’.
Subglottal pressure and fundamental frequency control in contact calls of juvenile Alligator mississippiensis
TLDR
The morphological and physiological features of sound production in alligators are investigated and it is concluded that the alligator larynx represents a sound source with only two control parameters (subglottal pressure and vocal fold adduction) in contrast to the mammalian larynX in which three parameters can be altered to modulate frequency.
Vocal Sound Production and Acoustic Communication in Amphibians and Reptiles
Most amphibians and reptiles produce sounds with a larynx containing a pair of vocal cords. Clicking and hissing are common in both groups whereas tonal sounds are found most frequently in anurans
Larynx morphology and sound production in three species of Testudinidae
TLDR
This study analyzes the morphology and histology of the larynx of three species of Testudinidae in order to ascertain the presence of vibrating acoustic structure, and proposes a general model for phonation in tortoises.
Acoustic signals of baby black caimans.
Exceptional high-frequency hearing and matched vocalizations in Australian pygopod geckos
SUMMARY We describe exceptional high-frequency hearing and vocalizations in a genus of pygopod lizards (Delma) that is endemic to Australia. Pygopods are a legless subfamily of geckos and share their
Vertebrate Bioacoustics: Prospects and Open Problems
TLDR
Most known vocal peculiarities including air sacs, vocal fold modifications, the syringeal bulla present in most ducks, or the elongated trachea seen in many bird species are covered.
Acoustic behavior of the gekkonid lizard, Hemidactylus frenatus
The present study demonstrates that Hemidactyltis frenatus has a vocal repertory of three functionally, physically distinct calls that are important in its social behavior. The multiple chirp (MC)
CHATTY FEMALES AND QUIET MALES: COMPLEX VOCAL COMMUNICATION IN THE NORTHERN DTELLA, GEHYRA DUBIA
TLDR
The vocal repertoire of a house gecko native to tropical Australia, the Northern Dtella (Gehyra dubia), is described, which is among the most complex yet studied among squamate reptiles, and individuals modify calling rates according to sex, body size, and social context.
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