Zygentoma are an order in the class Insecta, and consist of about 550 known species. The Zygentoma include the so-called silverfish or fishmoths, and the firebrats. A conspicuous feature of the order are the three long caudal filaments. The two lateral filaments are cerci, and the medial one is an epiproct or appendix dorsalis. In this they resemble the Archaeognatha, although the cerci of Zygentoma, unlike in the latter order, are nearly as long as the epiproct.
Nicoletiidae is a family of primitive insects belonging to the order Zygentoma. These insects live primarily underground, under detritus, or in caves. A few species are recorded as commensals inside nests of social insects, such as the species Allotrichotriura saevissima which lives inside fire ant nests.
Battigrassiella is a genus of nicoletiids in the family Nicoletiidae. There is one described species in Battigrassiella, B. wheeleri.
Cubacubana is a genus of nicoletiids in the family Nicoletiidae.
Prosthecina is a genus of nicoletiids in the family Nicoletiidae.
Squamigera is a genus of nicoletiids in the family Nicoletiidae.
Texoreddellia is a genus of nicoletiids in the family Nicoletiidae. There is one described species in Texoreddellia, T. texensis.
Graphitarsus is a genus of jumping bristletails in the family Machilidae.
Metagraphitarsus is a genus of jumping bristletails in the family Machilidae.
Paetrobius is a genus of jumping bristletails in the family Machilidae.
Petrobiellus is a genus of jumping bristletails in the family Machilidae.
Wygodzinskilis is a genus of jumping bristletails in the family Machilidae. There is at least one described species in Wygodzinskilis, W. klinocellata.
Pseudomachilanus is a genus of jumping bristletails in the family Machilidae.
Protrinemura is a genus of nicoletiids in the family Nicoletiidae. There is at least one described species in Protrinemura, P. mediterranea.
Protrinemurella is a genus of silverfish in the family Protrinemuridae.
Protrinemuroides is a genus of silverfish in the family Protrinemuridae.
Trinemophora is a genus of silverfish in the family Protrinemuridae.
Tricholepidion is a genus of forest silverfish in the family Lepidotrichidae. There is one described species in Tricholepidion, T. gertschi.
Atelura formicaria is a species of nicoletiid in the family Nicoletiidae.
Atelura montana is a species of nicoletiid in the family Nicoletiidae.
