Amphipsocidae is a family of hairy-winged barklice in the order Psocodea. Most species are 3.0-4.5 mm long and have many setae (hairs) on the veins and margin of the forewing. The main veins of the forewing are usually lined with two rows of setae. Like the other members of the infra-order Caeciliusetae, they have a broad, flat labrum, with well defined edges.
Philotarsidae is a family of Psocodea belonging to the suborder Psocomorpha. The family is closely related to the family Pseudocaeciliidae, both within the infraorder Philotarsetae.
Psocidae is a family of barklice in the order Psocodea.
Psocetae is an infraorder of bark lice in the order Psocodea, within the suborder Psocomorpha. It includes the families Hemipsocidae, Myopsocidae, Psilopsocidae and Psocidae.
Pachytroctidae is a family of thick barklice in the order Psocodea. There are about 15 genera and at least 90 described species in Pachytroctidae.
Caeciliusetae is an infraorder of Psocodea in the suborder Psocomorpha. There are about 6 families and more than 1,300 described species in Caeciliusetae.
Asiopsocidae is a family of Psocodea belonging to the infraorder Caeciliusetae. The family is composed of 14 known species of barklice in three genera: Asiopsocus, Notiopsocus, and Pronotiopsocus. One species from each genus has been found in the United States.
Peripsocidae is a family of Psocodea belonging to the suborder Psocomorpha. Members of the family are characterised by their absence of an areola postica in their wings. Many of the recently described genera are closely allied to Peripsocus. The family includes more than 300 species.
Lachesillidae is a family of Psocodea belonging to the suborder Psocomorpha. Members of the family are characterized by a rounded, free areola postica in their wings. Males have diverse sclerotized genitalic structures. The family includes more than 400 species, most of them in the genus Lachesilla.
Elipsocidae is a family of Psocodea belonging to the infraorder Homilopsocidea. Members of the family have a free areola postica. Many species are apterous. The family includes about 130 species in more than 30 genera.
Caeciliusidae is a family of Psocodea belonging to the suborder Psocomorpha. The family was once named Caeciliidae, but the latter name was changed because of homonymy with the amphibian family Caeciliidae. The subfamily Paracaeciliinae was formerly in Caeciliusidae, but it has been elevated to family rank, Paracaeciliidae.
Homilopscocidea is an infraorder of Psocodea. It is probably a paraphyletic group, still in use for lack of a better solution. There are about 7 families and more than 1,200 described species in Homilopsocidea.
Epipsocidae is an insect family of Psocodea belonging to the suborder Psocomorpha, that includes, among others, the genera Bertkauia, Epipsocus, Epipsocopsis, Goja, and the New Guinean endemic Dicropsocus. It includes 16 genera with more than 140 species. The only European species in the family is the apterous Bertkauia lucifuga. Like the other members of the infraorder Epipsocetae, they have a labrum with two sclerotized ridges. Epipsocids are barklice found primarily in tropical regions, and one of their distinguishing characteristics is the hairy ventral surface of the forewing.
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 parasitic lice (Phthiraptera), they are believed to have evolved from within the former order Psocoptera, which contained the bark lice and book lice, now found to be paraphyletic. They are often regarded as the most primitive of the hemipteroids. Psocodea contains around 11,000 species, divided among four suborders and more than 70 families. They range in size from 1–10 millimetres (0.04–0.4 in) in length.
Ptyctini is a tribe of common barklice in the family Psocidae. There are about 6 genera and at least 20 described species in Ptyctini.
Psocinae is a subfamily of common barklice in the family Psocidae. There are about 11 genera and at least 40 described species in Psocinae.
Psoquillidae is a family of bird nest barklice in the order Psocodea. There are about 8 genera and more than 30 described species in Psoquillidae.
Soa is a genus of scaly-winged barklice in the family Lepidopsocidae. There are about six described species in Soa.
Trogiidae is a family of granary booklice in the order Psocodea. There are about 11 genera and more than 50 described species in Trogiidae.
Paracaeciliidae is a family of bark lice in the order Psocodea. There are about 5 genera and more than 100 described species in Paracaeciliidae.
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