vocal sac


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vocal sac

n.
An inflatable pouch on the floor of the mouth cavity of a male frog that amplifies sounds produced by the vocal cords.

vocal sac

n
(Zoology) zoology either of the loose folds of skin on each side of the mouth in many male frogs that can be inflated and act as resonators
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The bats' sonar spies the amphibians' ballooning vocal sac (shown), turning a sexual display into an invitation for lunch.
A few were captured after bouts and also identified as males due to the presence of a vocal sac.
To produce this call he takes a big gulp of air that puffs up the vocal sac in his throat until it looks Like a big bubble.
To beat their competitors in the fight for females, these tiny frogs have a built-in volume control: an inflatable vocal sac (balloonlike pouch) beneath the mouth.
Diagnosis: (1) skin of dorsum shagreen with flat warts, that of venter areolate; short dorsolateral folds present; (2) tympanum round, its length 45-54 % that of eye; (3) snout short, subacuminate in dorsal view, rounded in profile; canthus rostralis sharp; (4) upper eyelid narrower than interorbital distance, no cranial crests; (5) vomerine odontophores oval; (6) vocal sac and nuptial pad present in males; (7) first finger shorter than second; fingers lack disks but with ventral pads; (8) fingers bear lateral keels; (9) ulnar tubercles present, fusing to form ridge; (10) round tubercle on heel; outer tarsal fold present; short inner tarsal fold; (11) inner metatarsal tubercle oval, 1.
This bubble is called a vocal sac, and it makes my calls louder.
Males have large vocal slits positioned just anterior to the rictus and opening into a single large vocal sac.
Da Silva (1998) did not include vocal sac architecture as one of his characters but this character must represent some sort of homoplasy, given his cladogram.
I got to spend my first six weeks living and growing in your vocal sac.
The vocal sac is subgularly poorly developed and possess lateral extensions to the area behind the jaw angles.