It is possible that these formed a lift-generating surface similar to the tail fans of euornitheans, though the fan-like tail of this species may have evolved independently of the modern bird lineage.
12.
When the sensory hairs of the tail fan of crayfish are stimulated, the LG activates the motor neurons that control flexion movements of the abdomen in the way that propels the crayfish away from the source of the stimulation.
13.
The abdomen is divided into two parts : the pleosome which bears swimming legs; and the urosome, which comprises a telson and three pairs of uropods which do not form a tail fan as they do in animals such as true shrimp.
14.
W . T . Calman coined the term " caridoid facies " for the common eumalacostracan ( shrimp-like ) features; the most important of these is the constant number of segments in each thoracomeres ) and six segments in the pleon and possess a telson, which forms a characteristic tail fan when the uropods are present.
15.
In the traditional aarti ceremony, the flower represents the earth ( solidity ), the water and accompanying handkerchief correspond with the water element ( liquidity ), the ghee or oil lamp represents the fire component ( heat ), the peacock fan conveys the precious quality of air ( movement ), and the yak-tail fan represents the subtle form of ether ( space ).
