Head porotaxy and chaetotaxy of order Acerentomata (Protura)

The head porotaxy and chaetotaxy was studied in three families of proturans in the order Acerentomata: Hesperentomidae,Protentomidae and Acerentomidae. The head chaetotaxy of Protentomidae is highly diversified. A system of head setae names was developed and applied for a phyletic analysis of Acerentomata.