The Hexapoda represent a monophyletic lineage within the Pancrustacea [1–3]. This lineage
includes the insects and a number of apterygote groups such as Collembola, Diplura, Protura
and Archaeognatha. Recent phylogenetic analysis has shown that Hexapoda represent one of
six terrestrialization events within the Ecdysozoa [4]. According to this reconstruction, Hexapoda
derive from a crustacean ancestor. This is supported by a study from Von Reumont et al.,
which suggests that hexapods most likely derive from a single terrestrialization event of an
originally crustacean lineage