Insects
Antennae are the primary olfactory sensors of insects and are accordingly well-equipped with a wide variety of sensilla (singular: sensillum). Paired, mobile, and segmented, they are located between the eyes on the forehead. Embryologically, they represent the appendages of the second head segment.
All insects have antenna, however they may be greatly reduced in the larval forms. Amongst the non-insect classes of Hexapoda, Collembola and Diplura have antenna, but Protura do not.
Read more about this topic: Antenna (biology)
Famous quotes containing the word insects:
“swerving
perfectly,
the fierce, brilliant faith
that pierces the heart all summer
and sips bitter insects steeped in nectar ...”
—Denise Levertov (b. 1923)
“Our treasure lies in the beehive of our knowledge. We are perpetually on the way thither, being by nature winged insects and honey gatherers of the mind.”
—Friedrich Nietzsche (1844–1900)
“If the stars that move together as one, disband,
Flying like insects of fire in a cavern of night,
Pipperoo, pippera, pipperum . . . The rest is rot.”
—Wallace Stevens (1879–1955)