Aptery

Aptery is the anatomical condition of an animal completely lacking any kind of wings. An animal with this condition is said to be apterous. Most animal species belong to and are phylogenetic descendants of apterous taxa. These groups are said to be primarily apterous. Insects that are primarily apterous belong to the subclass Apterygota. Apterous animals which belong to or are phylogenetic descendants of winged taxa are said to be secondarily apterous. 5% of extant Pterygota are believed to be secondarily apterous, including entire orders, such as fleas and Notoptera.

Aptery

Aptery is the anatomical condition of an animal completely lacking any kind of wings. An animal with this condition is said to be apterous. Most animal species belong to and are phylogenetic descendants of apterous taxa. These groups are said to be primarily apterous. Insects that are primarily apterous belong to the subclass Apterygota. Apterous animals which belong to or are phylogenetic descendants of winged taxa are said to be secondarily apterous. 5% of extant Pterygota are believed to be secondarily apterous, including entire orders, such as fleas and Notoptera.