Tympanal bullae see tympanal hood

tympanal fossa (ARTHRO: Insecta) In Diptera, a largely membranous area between the suprasquamal ridge and the lower margin of the postalar wall.

tympanal frame (ARTHRO: Insecta) The supporting framework of the tympanal membrane.

tympanal hood (ARTHRO: Insecta) In some Lepidoptera, one of a pair of tubercles or rounded prominences on the dorsal surface at the base of the first abdominal segment.

tympanal organs (ARTHRO: Insecta) Specialized chordotonal organs that occur on prothoracic legs, mesothorax, metathorax, or abdomen; the auditory organ or eardrum.

tympanal pockets (ARTHRO: Insecta) In Lepidoptera, pockets in the tympanal frame, usually 4 in number.

tympanal ridge (ARTHRO: Insecta) In some Diptera, a rib-like sclerite forked anteriorly, forming a single or double Y that encloses the tympanic pit.

tympanic pit (ARTHRO: Insecta) In Diptera, a membranous area opening toward the base of the wing, enclosed by the two lowermost arms of the tympanal ridge.

tympanum n.; pl. -ana [Gr. tympanon, drum] (ARTHRO: Insecta) A vibrating membrane involved in hearing; typanic membrane; an auditory membrane.

Tyndall colors or scattering (ARTHRO: Insecta) Color of certain insects resulting from interference of light reflected by granules cast upon an absorbing layer of dark pigment beneath a more or less transparent cuticle; producing blue, green or white, depending upon the size of granules.

type n. [Gr. typos, type] A zoological object that serves as the base for the name of a taxon.

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