...On the Difference between the Human Membrana Tympani and thatof the Elephant... 
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...In the latter there is a considerable bulging belowthe aperture of the ear called the bulla tympani, or bulb of thedrum...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...Frogs from the Caribbeanlowlands of Honduras and Costa Rica are relatively large and have relativelylong tibiae and small tympani...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...The delicate, spindle-shaped columellae lie ventral to the tegmen tympani andsquamosals, are spatulate distally, and have a broad basal attachment to theauditory region...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Males are generally smaller than females and have proportionately longerheads and usually larger tympani...
John D. Lynch 「A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope」
...Males of the two species can be readily separated by therelative sizes of the tympani, presence or absence of vocal slits, andcolor pattern...
John D. Lynch 「A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope」
...pipilans to have larger tympani...
John D. Lynch 「A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope」
...The membrana tympani is larger than in other quadrupeds of the same size...
David Collins 「An Account of the English Colony in New South Wales, Vol. 2」
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