Synonym: Entognatha; Thysanura.
Name: apterous means without wings.
Clades:
Insecta;
Ecdysozoa;
Animals.
Genera: > 5000 species.
ZoologyEntognatha are ametabolous animals, similar to insects. Their mouthparts are entognathous, retracted within the head.
They are apterous, wingless.
TaxonomyApterygota were historically united in Thysanura and
Apterygota.
They evolved independently from
Insecta.
Insecta in the strict sense = Ectognatha =
Hexapoda -
ApterygotaInsecta = Dicondylia + Archaeognatha.
Animal TheoryOne can treat
Apterygota as part of
Insecta. Then
Insecta is treated in a broader sense and is similar to
Hexapoda.
OrdersCollembola: springtails
Diplura: two-tails.
Protura: first-tail.
Thysanura: