Mammalian ear specializations in arid habitats: structural and functional evidence from sand cat (Felis margarita)

  title={Mammalian ear specializations in arid habitats: structural and functional evidence from sand cat (Felis margarita)},
  author={G T Huang and John J. Rosowski and Michael E Ravicz and William T. Peake},
  journal={Journal of Comparative Physiology A},
Abstract. [] Key Result The area of the external ear's pinna flange is similar to that of domestic cat. The dimensions of the ear canal are about twice domestic cat's, as is the volume of the middle-ear air space. The magnitude of the acoustic input-admittance at the tympanic membrane is about five times larger than that of domestic cat; both the middle-ear cavities and the ossicular chain contribute to the increase.
Structure and function of the mammalian middle ear. I: Large middle ears in small desert mammals
While Macroscelides was found here to have middle ear cavities so large that together they exceed brain volume, the bullae of Elephantulus are considerably smaller, but it may relate to microhabitat.
Functional anatomy of the middle and inner ears of the red fox, in comparison to domestic dogs and cats
Overall, the ear structures of foxes, dogs and cats are anatomically very similar, and their behavioural audiograms overlap, however, the results of several published models and correlations that use middle and inner ear measurements to predict aspects of hearing were not always found to match well with audiogram data, especially when it came to the sharper tuning in the fox audiogram.
A phylogenetic test of adaptation to deserts and aridity in skull and dental morphology across rodents
Bullar hypertrophy is among the strongest patterns of convergent cranial desert adaptation in rodents and indicates that adaptation plays a similar role in shaping the evolution of this structure in different desert rodent clades.
Keeping an ear out: size relationship of the tympanic bullae and pinnae in bandicoots and bilbies (Marsupialia: Peramelemorphia)
There was a phylogenetic correlation between the structures and that they were significantly influenced by temperature (max/average) and precipitation (average).
Morphology of the middle ear of golden moles (Chrysochloridae)
It is proposed that adaptations towards low-frequency airborne hearing might have predisposed golden moles towards the evolution of seismic sensitivity through inertial bone conduction and the morphology of the middle ear apparatus sheds little light on the disputed ordinal position of the Chrysochloridae.
Ecometrics and Neogene faunal turnover: the roles of cats and hindlimb morphology in the assembly of carnivoran communities in the New World
ABSTRACT Cats possess some of the highest ankle gear ratios of any extant carnivorans, a feature that facilitates leaping and sprinting involved in ambush predation and scansorial lifestyles. In
Ear Structures of the Naked Mole-Rat, Heterocephalus glaber, and Its Relatives (Rodentia: Bathyergidae)
Substantial intraspecific differences were found in certain middle and inner ear structures, which might reflect a lack of selective pressure on its peripheral auditory system and also result from relaxed selective pressures.
Spectral characteristics of intense mew calls in cat species of the genus Felis (Mammalia: Carnivora: Felidae)
The hypothesis supported best by the data is that spectral features of intense mew calls in the Felis taxa studied have evolved to reduce attenuation when propagating through their respective habitat types.


The middle ear of a lion: comparison of structure and function to domestic cat.
The results suggest that quantitative measures of middle-ear cavity structure could allow prediction of frequency-dependent features of acoustic sensitivity for the entire cat family.
A Function of the Enlarged Middle-Ear Cavities of the Kangaroo Rat, Dipodomys
The middle-ear volume in Dipodomys merriami and D. spectabilis, whose body weight is 110 gm, is approximately proportional to body weight in these two species.
Sound-power collection by the auditory periphery of the Mongolian gerbil Meriones unguiculatus: III. Effect of variations in middle-ear volume.
Results are consistent with the idea that large middle-ear cavities evolved in gerbil to improve hearing sensitivity below 3 kHz and thereby improve the animal's chances for survival.
Sound-power collection by the auditory periphery of the mongolian gerbil Meriones unguiculatus. II. External-ear radiation impedance and power collection.
The diffuse-field sound pressure required to deliver 5 x 10(-17) W to the middle ear between 10 Hz and 18 kHz resembles the behavioral auditory threshold, and supports the idea that the cochlea acts as a power detector at the auditory threshold.
Tests of some common assumptions of ear-canal acoustics in cats.
Measurements of acoustic admittance at different canal locations in domestic cats are used to test three common assumptions and demonstrate that noninvasive measurements in the canal describe middle-ear acoustic properties to within tolerances that depend on the effects of the canal.
The auditory bulla in carnivora: An anatomical basis for reappraisal of carnivore evolution
  • R. Hunt
  • Environmental Science
    Journal of morphology
  • 1974
It is shown here that the carnivore bulla is formed by three and in some cases four ontogenetic elements: tympanic, rostral entotyMPanic, caudalEntotympanic(s), which appear to correspond to bulla elements discovered over 50 years ago by Van der Klaauw in representative species of several other orders of mammals.
Auditory systems of Heteromyidae: Functional morphology and evolution of the middle ear
Middle ears (515) from 26 species of the rodent family Heteromyidae — genera Dipodomys, Microdipodops, Perognathus, and Liomys —were studied both grossly and histologically, for qualitative and
Outer and Middle Ears
The function of the mammalian external and middle ears (at least in terrestrial mammals) appears qualitatively similar, but there are large differences in the scale and form of mammalian middle and external ears.
Middle-ear transmission: Acoustic versus ossicular coupling in cat and human