WBilobella
WBourletiella arvalis
WBourletiella hortensis
WBourletiellidae
WBrachystomella
WBrachystomella parvula
WDesoria
WDeuteraphorura kruberaensis
WDeutonura
WDicyrtoma
WDicyrtomina
WDicyrtomina minuta
WDicyrtominae
WEntomobrya
WEntomobrya atrocincta
WEntomobrya intermedia
WEntomobrya nivalis
WEntomobrya zona
WEntomobryidae
WEntomobryoidea
WFolsomia
WGlacier flea
WHeteromurus
WHeteromurus nitidus
WHypogastruridae
WIsotoma (springtail)
WIsotoma viridis
WIsotomidae
WIsotomiella minor
WIsotominae
WIsotomurus
WNeanura muscorum
WNeanuridae
WNeelipleona
WOnychiuridae
WOrchesella
WPodura
WPodura aquatica
WSeira (springtail)
WSminthuridae
WSminthurinus
WSminthurinus elegans
WSminthurinus niger
WTomocerus minor
WWillowsia
WWillowsia nigromaculata
WXenylla
WXenylla grisea