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Mechanistic insights into mosquito antennal architecture for auditory adaptations.
Acta Biomater
January 2025
Lyles School of Civil and Construction Engineering, Purdue University, West Lafayette, IN, 47907, USA. Electronic address:
Unlike organisms equipped with tympanal ears, mosquitoes hear using their antennae, which are lightweight sensory structures capable of detecting sound. Here, we study the antennae of two species - Aedes aegypti and Uranotaenia lowii - known to use hearing for different functions. Through the use of geometrically comprehensive computational models, we find that architectural features in the mosquito antenna provide mechanisms that promote the detection of species and sex specific acoustic targets amidst the non-target signals produced by their own wingbeats.
View Article and Find Full Text PDFTympanal organ plays an important role for insects in perception, fleeing from predators, defense, finding and choosing sex, communication, and carrying out social interactions. It is positioned in different areas among various insect groups. Tympanal organ is in the abdomen in the Pyralidae family, many species of which are harmful to economically important agricultural products and storage products.
View Article and Find Full Text PDFUnusual Foreign Body in the Middle Ear: Surgical Removal of a Live Ant Entering the Tympanic Cavity Through an Ear Drum Perforation.
Diagnostics (Basel)
November 2024
Department of Otorhinolaryngology, Medical University of Graz, Auenbruggerplatz 26, 8010 Graz, Austria.
This case report details the unusual occurrence of a live ant invading the middle ear cavity through a pre-existing perforation in the tympanic membrane of a 42-year-old female patient. She presented to an outpatient clinic with symptoms of sudden-onset tinnitus ("ringing") and a foreign body sensation in her left ear. Otomicroscopy revealed an oval-shaped perforation in the posterior part of the left tympanic membrane, through which a dark, moving foreign object was observed in the middle ear.
View Article and Find Full Text PDFCoupled membranes: a mechanism of frequency filtering and transmission in the field cricket ear evidenced by micro-computed tomography, laser Doppler vibrometry and finite element analysis.
J R Soc Interface
June 2024
Bioacoustics Group, Centre for Ultrasonic Engineering, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, UK.
Article Synopsis
- Many animals have a second frequency filter for sound beyond just the eardrum, which is particularly interesting in the hearing mechanism of field crickets.
- Researchers found that a "dividing membrane" linked to the tracheal branches plays a key role in filtering and transmitting sound, and it resembles the eardrum in thickness.
- Advanced techniques like micro-computed tomography and laser vibrometry demonstrated that the sound vibrations detected by the eardrum are actually influenced by the coupling of this membrane, shedding light on the cricket's hearing and its potential applications in technology.
Defensive fungal symbiosis on insect hindlegs.
bioRxiv
March 2024
Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
Tympanal organs as "insect ears" have evolved repeatedly. Dinidorid stinkbugs were reported to possess a conspicuous tympanal organ on female's hindlegs. Here we report an unexpected discovery that the stinkbug's "tympanal organ" is actually a novel symbiotic organ.
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