Minute hairs projecting from the integument, they are formed around cellular filaments: Microtrichiuiaare found on the wings of many insects.

An integument is a natural outer covering or coat: such as, the skin of an animal or the membrane enclosing an organ or the envelope of an ovule.

Minute, hair-like structures found on the wings of certain insects. They resemble small covering hairs, but the absence of basal articulation distinguishes them. Fixed hairs or aculei, are minute non-movable hairs formed from cuticle; may produce an impression of cloudiness or color.