Phylogenetic-reference
Guides
Petrobius brevistylus
Petrobius brevistylus is a species of bristletail in the family Machilidae, order Zygentoma. The species is represented by a silhouette illustration credited to Birgit Lang on PhyloPic.org, where it has been used in scientific figures to exemplify Apterygota. The specific epithet 'brevistylus' refers to short styli, a morphological feature of the genus. As a member of Zygentoma, this species belongs to one of the most basal lineages of wingless insects, representing an ancient evolutionary grade that predates the evolution of wings in insects.