#apterous

• Apterous — Having no wings; an organism, bird, or insect structurally lacking wings or a flight apparatus. This anatomical trait can be primitive, unchanged throughout evolution, or secondarily acquired through the regression or atrophy of wings as a specific adaptation to terrestrial, subterranean, or parasitic environments.
• Aribi — A rare or regional taxonomic term used in old entomology or specialized papers to denote a specific group of insects or organisms presenting distinct structural features related to the absence of wings or the conformation of their mouthparts. In medical or biological lexicography, it can also appear as a derived form from a neologistic root indicating the absence or functional reduction of paired anatomical elements.