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Halteres
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Halteres are a pair of small club-shaped organs on the body of some flying insects that provide information about body rotations during flight. They are present on insects belonging to two orders, Dip
8= single pair of wings and 9= halteres
8= single pair of wings and 9= halteres
Crane fly haltere
Crane fly haltere
Electron micrograph of fly haltere and surrounding structures: 1 calyptra (squama) 2 upper calypter (antisquama) 3 haltere 4 mesopleuron 5 hypopleuron
Electron micrograph of fly haltere and surrounding structures: 1 calyptra (squama) 2 upper calypter (antisquama) 3 haltere 4 mesopleuron 5 hypopleuron 6 coxa 7 wing 8 abdominal segment 9 mesonotum c capitellum of haltere p pedicel of haltere s scabellum of haltere
Haltere length and shape varies from species to species.
Haltere length and shape varies from species to species.
Coriolis force
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In physics, the Coriolis force is a pseudo-force that acts on objects in motion within a frame of reference that rotates with respect to an inertial frame. In a reference frame with clockwise rotation
Halteres
…the wings and operate like vibrating structure gyroscopes: any rotation of the plane of oscillation causes a force on the vibrating halteres by the Coriolis effect. The insect detects this force with sensory organs called campaniform sensilla and chordotonal organs located at the base of the halteres and uses this…
Image from Cursus seu Mundus Mathematicus (1674) of C.F.M. Dechales, showing how a cannonball should deflect to the right of its target on a rotating
Image from Cursus seu Mundus Mathematicus (1674) of C.F.M. Dechales, showing how a cannonball should deflect to the right of its target on a rotating Earth, because the rightward motion of the ball is faster than that of the tower.
Image from Cursus seu Mundus Mathematicus (1674) of C.F.M. Dechales, showing how a ball should fall from a tower on a rotating Earth. The ball is rele
Image from Cursus seu Mundus Mathematicus (1674) of C.F.M. Dechales, showing how a ball should fall from a tower on a rotating Earth. The ball is released from F. The top of the tower moves faster than its base, so while the ball falls, the base of the tower moves to I, but the ball, which has the eastward speed of the tower's top, outruns the tower's base and lands further to the east at L.
Due to the Coriolis force, low-pressure systems in the Northern Hemisphere, like Typhoon Nanmadol (left), rotate counterclockwise, and in the Southern
Due to the Coriolis force, low-pressure systems in the Northern Hemisphere, like Typhoon Nanmadol (left), rotate counterclockwise, and in the Southern Hemisphere, low-pressure systems like Cyclone Darian (right) rotate clockwise.
Cloud formations in a famous image of Earth from Apollo 17, makes similar circulation directly visible
Cloud formations in a famous image of Earth from Apollo 17, makes similar circulation directly visible