...—Diameter of tympanum 40... 
John D. Lynch 「A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope」
...The eye ofthe camera sees the invisible and photographs the image of theultra-violet rays; the tympanum of the microphone hears what to us issilence...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
...My old tympanum is not always capable ofperceiving these subtleties of sound...
J. H. Fabre 「The Wonders of Instinct」
...; tympanum/eye,40...
William E. Duellman 「Descriptions of Two Species of Frogs, Genus Ptychohyla」
...; tympanum/eye, 50...
William E. Duellman 「Descriptions of Two Species of Frogs, Genus Ptychohyla」
...Of thevarious measurements and proportions, the snout-vent length andthe relative size of the tympanum to the eye apparently are of moretaxonomic importance than the others (Table 1)...
William E. Duellman 「A Review of the Frogs of the Hyla bistincta Group」
...In all of thespecies the tympanum is at least partially covered by a heavy,dermal supratympanic fold, and in some specimens of H...
William E. Duellman 「A Review of the Frogs of the Hyla bistincta Group」
...A heavy dermal foldfrom posterior corner of eye above tympanum and then to insertion offorearm; tympanum round, its diameter three-fourths its distance fromeye...
William E. Duellman 「A Review of the Frogs of the Hyla bistincta Group」
..., have as many as 9vomerine teeth, and have a proportionately larger tympanum than males...
William E. Duellman 「A Review of the Frogs of the Hyla bistincta Group」
...In Bufo occidentalis the tympanum usually is indistinct andsometimes completely covered, and it is absent in bocourti...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...Ptychohylaignicolor differs from all of the other species in having the headslightly wider than long and the tympanum noticeably less than halfthe size of eye...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...—Diameter of tympanum more than half of diameter of eye;internarial region depressed; toes three-fourths webbed; no red flash-colors onthighs...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...Thin dermal fold, fromposterior corner of eye above tympanum to insertion of fore limb, coveringupper edge of tympanum; tympanum nearly round, its diameter equal to itsdistance from eye...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...ignicolor differs as follows: Tympanum smaller; snout more nearly square; lesswebbing on toes; internarial region flat instead of depressed; white lateralstripes lacking...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...; thin dermal foldextending posteriorly from posterior corner of eye, above tympanum, topoint above insertion of arm...
William E. Duellman 「Descriptions of New Hylid Frogs From Mexico and Central America」
...; thin dermal fold extending posteriorly from posteriorcorner of eye, obscuring upper edge of tympanum, curving downward topoint above insertion of arm...
William E. Duellman 「Descriptions of New Hylid Frogs From Mexico and Central America」
...; thindermal fold extending from posterior corner of eye to point aboveinsertion of arm; tympanum absent, not visible through skin...
William E. Duellman 「Descriptions of New Hylid Frogs From Mexico and Central America」
...The tympanum iscompletely concealed in all specimens...
William E. Duellman 「Descriptions of New Hylid Frogs From Mexico and Central America」
...In neither sex do theaverage proportions differ noticeably from those of the holotype, exceptthat the tympanum is relatively larger in females...
William E. Duellman 「Descriptions of New Hylid Frogs From Mexico and Central America」
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