Ptiloneuridae (literally "downy veins") is a

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Psocodea Psocodea is a taxonomic group of insects comprising the bark lice, book lice and parasitic lice. It was formerly considered a superorder, but is now generally considered by entomologists as an order. Despite the greatly differing appearance of ...

(formerly

Psocoptera Psocoptera () are a paraphyletic group of insects that are commonly known as booklice, barklice or barkflies. The name Psocoptera has been replaced with Psocodea in recent literature, with the inclusion of the former order Phthiraptera into Psoc ...

) belonging to the

suborder Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized ...

Psocomorpha Psocomorpha is a suborder of barklice, booklice, and parasitic lice in the order (biology), order Psocodea (formerly Psocoptera). There are more than 20 families and 5,300 described species in Psocomorpha. Phylogeny The below cladogram of Psoco ...

. Like the other members of the

infraorder Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between Family_(biology), family and Class_(biology), class. In biological classification, the order is a taxonomic rank used in the classific ...

Epipsocetae Epipsocetae is an infraorder of psocids in the order Psocodea (formerly Psocoptera). There are about 5 families and more than 480 described species in Epipsocetae. Families These five families belong to the infraorder Epipsocetae: * Cladiopsoci ...

, they have a labrum with two

sclerotized Sclerosis (also sclerosus in the Latin names of a few disorders) is a hardening of tissue and other anatomical features. It may refer to: * Sclerosis (medicine), a hardening of tissue * in zoology, a process which forms sclerites, a hardened exo ...

ridges.

Sources

* Lienhard, C. & Smithers, C. N. 2002. Psocoptera (Insecta): World Catalogue and Bibliography. Instrumenta Biodiversitatis, vol. 5. Muséum d'histoire naturelle, Genève. Psocoptera families Psocomorpha {{Psocoptera-stub