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The animals spread their fins and tentacles to form wings and actively control lift force with body posture. [20] One species, Todarodes pacificus , has been observed spreading tentacles in a flat fan shape with a mucus film between the individual tentacles, [ 20 ] [ 21 ] while another, Sepioteuthis sepioidea , has been observed putting the ...
Tympanal organ on the tibia of the katydid Zabalius aridus Tympanal organ of two species of moths, ventral view of abdomen (Tineidae and Pyralidae). A tympanal organ (or tympanic organ) is a hearing organ in insects, consisting of a tympanal membrane stretched across a frame backed by an air sac and associated sensory neurons. [1]
Only vertebrate animals have ears, though many invertebrates detect sound using other kinds of sense organs. In insects, tympanal organs are used to hear distant sounds. They are located either on the head or elsewhere, depending on the insect family . [ 25 ]
The interior of the thorax houses the muscles that control the wings and legs. [16] Two differential grasshoppers, with visible spines along the tibia of the hind legs Ensifera, like this great green bush-cricket Tettigonia viridissima, somewhat resemble grasshoppers but have over 20 segments in their antennae and different ovipositors.
The wings are moved by the rapid muscular contraction and expansion of the thorax. [11] The wings arise from the meso- and meta-thoracic segments and are similar in size in the basal groups. In more derived groups, the meso-thoracic wings are larger with more powerful musculature at their bases and more rigid vein structures on the costal edge. [7]
The tympanum, or ear, is located in the front tibia in crickets, mole crickets, and bush crickets or katydids, and on the first abdominal segment in the grasshoppers and locusts. [2] These organisms use vibrations to locate other individuals. Grasshoppers and other orthopterans are able to fold their wings (i.e. they are members of Neoptera).
As the Fighting Irish seek their first national championship since 1988, the voices are getting louder. This article originally appeared on USA TODAY Sports: Notre Dame's 'Wake up the echoes ...
Although only males produce the cicadas' distinctive sounds, both sexes have membranous structures called tympana (singular – tympanum) by which they detect sounds, the equivalent of having ears. Males disable their own tympana while calling, thereby preventing damage to their hearing; [45] a necessity partly because some cicadas produce ...