The tympanum is an external hearing structure in animals such as mammals , birds , some reptiles , some amphibians and some insects .
7-396: Eumastacidae are a family of grasshoppers sometimes known as monkey - or matchstick grasshoppers . They usually have thin legs that are held folded at right angles to the body, sometimes close to the horizontal plane. Many species are wingless and the head is at an angle with the top of the head often jutting above the line of the thorax and abdomen. They have three segmented tarsi and have
14-525: A member of the insect family Eumastacidae is a stub . You can help Misplaced Pages by expanding it . Tympanum (zoology) Using sound, vertebrates and many insects are capable of sensing their prey, identifying and locating their predators, warning other individuals, and locating potential mates and rivals by hearing the intentional or unintentional sounds they make. In general, any animal that reacts to sounds or communicates by means of sound, needs to have an auditory mechanism. This typically consists of
21-401: A membrane capable of vibration known as the tympanum, an air-filled chamber and sensory organs to detect the auditory stimuli. In frogs and toads , the tympanum is a large external oval shape membrane made up of nonglandular skin. It is located just behind the eye. It does not process sound waves ; it simply transmits them to the inner parts of the amphibian's ear, which is protected from
28-550: A short antenna with a knobby organ at the tip. They do not have a prosternal spine or tympanum . Most species are tropical and the diversity is greater in the Old World . They are considered primitive within the Orthoptera and feed on algae, ferns and gymnosperms, the more ancient plant groups. The families Chorotypidae and Morabidae were formerly included in this group as subfamilies but are now considered as families within
35-639: The Eumastacoidea. With the exception of the central Asian Gomphomastacinae, all other subfamilies are restricted to South America. The Orthoptera Species File lists the following: Auth.: Burr, 1899 - central and south America Auth.: Burr, 1899 - India, central and north-eastern Asia Auth.: Descamps, 1973 - Cuba Auth.: Rehn, 1948 - Americas Auth.: Rehn & Grant Jr., 1958 - south America Auth.: Descamps, 1971 - south America Auth.: Rehn & Grant Jr., 1958 - south America Auth.: Rehn & Grant Jr., 1958 - south America This article about
42-420: The entry of water and other foreign objects. A frog's ear drum works in very much the same way as does a human eardrum. It is a membrane that is stretched across a ring of cartilage like a snare drum that vibrates. Crossing the middle ear chamber there is an ossicle called the columella that is connected to the tympanum, and another ossicle, the operculum, that connects this to the oval membrane. This separates
49-467: The middle ear from the inner ear ; and its movements are reflected in vibrations in the fluid in the inner ear; these vibrations cause microscopic hairs to move, which send signals to the frog's brain. A frog's lungs are also involved in the reception of sound, although they are less sensitive than the frog's ear drums. This amphibian -related article is a stub . You can help Misplaced Pages by expanding it . This animal anatomy –related article
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