NJ tree based on K2P distances from 91 COI sequences of Protura.

Newly sequenced specimens labeled with lab code number (HP), abbreviation for genus, and species name. Color code for genera: Acerentomon = violet, Ionescuellum = green, Acerentulus = orange, Acerella = red, Eosentomon = blue; Austrian sample sites are coded with different icons: Leopoldsberg = square, Eichkogel = triangle, and Twimberger Graben = circle. Bootstrap support (given below nodes) derived from 5000 replicates. Maximally supported clusters and subclusters are indicated by black dots. Genus abbreviations: Aco = Acerentomon, Ion = Ionescuellum, Acu = Acerentulus, Ace = Acerella, and Eos = Eosentomon.