Psocodea
Guides
Lachesilla pallida
Lachesilla pallida is a species of fateful barklouse in the family Lachesillidae. It is known from North America, with records from the United States and Canada. As a member of the order Psocodea, it is a small, winged or wingless insect associated with bark and lichen habitats. The species was described by Chapman in 1930.
Lachesilla penta
fateful barklouse
Lachesilla penta is a species of barklouse in the family Lachesillidae, first described by Sommerman in 1946. It belongs to the order Psocodea, a group of small, soft-bodied insects commonly known as barklice or booklice. The species has been documented in parts of Central America and North America, including the United States and Mexico. Like other members of its family, it is likely associated with bark and dead plant material in forested environments.
Lachesilla rufa
fateful barklouse
Lachesilla rufa is a species of barklouse in the family Lachesillidae, originally described by Walsh in 1863 as Psocus rufus. It is one of numerous species in the genus Lachesilla, which comprises small, often overlooked insects commonly known as barklice or booklice. The species is known from North America, though detailed biological information remains limited.
Lachesilla tropica
Lachesilla tropica is a species of barklouse in the family Lachesillidae, described by García-Aldrete in 1982. The species belongs to the order Psocodea, a group of small insects commonly known as barklice or booklice. It has been recorded from the Caribbean Sea region, Central America, and North America, with specific distribution records from Mexico. As a member of Lachesillidae, it is part of a family of free-living barklice typically associated with vegetation and bark habitats.
Lachesillidae
Fateful Barklice
Lachesillidae is a family of barklice within the order Psocodea (formerly Psocoptera), suborder Psocomorpha. The family contains more than 400 species across 26 genera, with the majority belonging to the genus Lachesilla. Members are characterized by distinctive wing venation featuring a rounded, free areola postica, and males exhibit diverse sclerotized genitalic structures.
Lepinotus inquilinus
granary booklouse
Lepinotus inquilinus is a species of granary booklouse in the family Trogiidae. It has a broad cosmopolitan distribution spanning Africa, Australia, Europe, Northern Asia (excluding China), Central America, North America, Oceania, and Southern Asia. The species has been documented in the Azores archipelago (Pico, São Miguel, and Terceira islands). As a member of the granary booklice group, it is associated with stored products and human-modified environments.
Lepinotus reticulatus
reticulate-winged trogiid, reticulate-winged booklouse, granary booklouse
Lepinotus reticulatus is a species of granary booklouse in the family Trogiidae. It is one of the most widely distributed psocids, occurring across six continents in association with stored grain and dry organic materials. The species is frequently encountered in anthropogenic environments, particularly granaries, warehouses, and food storage facilities. Its common name refers to the distinctive reticulate wing venation pattern visible in winged morphs.
Lichenomima
mouse-like barklice
Lichenomima is a genus of psocopterans in the family Myopsocidae, commonly referred to as 'mouse-like barklice.' The genus was established by Enderlein in 1910 and contains more than 40 described species. These insects are part of the diverse barklice fauna associated with tree bark and lichen habitats.
Lichenomima lugens
mouse-like barklouse
Lichenomima lugens is a species of barklouse in the family Myopsocidae, originally described by Hagen in 1861 as Psocus lugens. It belongs to a group commonly referred to as mouse-like barklice due to their general body form. The species has been documented in North America with records from both the United States and Canada. Like other members of Myopsocidae, it is associated with bark habitats.
Liposcelis hirsutoides
booklouse
Liposcelis hirsutoides is a species of booklouse in the family Liposcelididae. It was described by Mockford in 1978. The species has been documented across a broad geographic range spanning North, Central, and South America. Like other members of the genus Liposcelis, it belongs to the order Psocodea, which includes barklice and parasitic lice.
Liposcelis nigra
booklouse
Liposcelis nigra is a minute species of booklouse in the family Liposcelididae. It belongs to a genus of nearly microscopic insects commonly associated with stored products and household environments. The species was described by Nathan Banks in 1900 and is known from North America.
Liposcelis pallida
Liposcelis pallida is a species of booklice in the family Liposcelididae, described by Mockford in 1978. It belongs to a genus commonly associated with stored products and household environments. The species has been documented in the United States and Mexico.
Liposcelis pearmani
Liposcelis pearmani is a species of booklouse in the family Liposcelididae, described by Lienhard in 1990. It belongs to a genus of small, wingless insects commonly associated with stored products and human dwellings. Like other Liposcelis species, it is likely a pantry pest, though specific details about this particular species are limited in available sources.
Lithoseopsis
barklice
Lithoseopsis is a genus of tropical barklice in the family Amphientomidae, containing approximately 10 described species. The genus was established by Mockford in 1993 and is primarily distributed in tropical regions of the Americas. A 2018 study described the first South American species from Brazil, expanding the known range beyond Central America and the Caribbean. Species are distinguished by forewing pigmentation patterns and details of the spermapore sclerite.
Loensia
barklice
Loensia is a genus of barklice in the family Psocidae, established by Enderlein in 1924. The genus contains more than 30 described species distributed across temperate regions of the Northern Hemisphere. Members are small, soft-bodied insects commonly found on tree bark and in leaf litter.
Loensia conspersa
common barklouse
Loensia conspersa is a species of barklouse in the family Psocidae, first described by Nathan Banks in 1903. It is one of approximately 62 documented observations on iNaturalist, indicating it is a documented but not extensively studied species. As a member of the Psocidae family, it belongs to a group of small, soft-bodied insects commonly known as barklice or booklice, though the specific ecological habits of this species remain poorly documented.
Loensia moesta
common barklouse
Loensia moesta is a species of barklouse in the family Psocidae, first described by Hagen in 1861 under the name Psocus moestus. It is widely distributed across North America, with confirmed records from the United States and Canada. As a member of the order Psocodea, it is part of a group of small, soft-bodied insects commonly known as barklice or booklice. The species is relatively well-documented in entomological collections and citizen science platforms, with over 140 verified observations on iNaturalist.
Maoripsocus
lizard barklice
Maoripsocus is a genus of barklice in the family Caeciliusidae, first described by Robin Tillyard in 1923. The genus comprises at least 21 described species, all commonly referred to as lizard barklice. Members of this genus are small, soft-bodied insects found in the order Psocodea. The genus is classified within the tribe Maoripsocini.
Maoripsocus africanus
lizard barklouse
Maoripsocus africanus is a species of lizard barklouse in the family Caeciliusidae. It was described by Ribaga in 1911. The species has been recorded from multiple continents, including Africa and North America, with specific distribution records from French Guiana, South Africa, USA, Angola, Congo, Mozambique, and Nigeria.
Mesopsocidae
Middle Barklice
Mesopsocidae is a family of barklice within the order Psocodea, suborder Psocomorpha. The family contains over 70 described species and is distinguished by a key morphological feature: a free areola postica in the wing venation. Members are small, soft-bodied insects commonly found in association with vegetation and bark surfaces.
Mesopsocus laticeps
middle barklouse
Mesopsocus laticeps is a species of middle barklouse in the family Mesopsocidae. It is widely distributed across Europe, Northern Asia (excluding China), North America, and Southern Asia. As a member of the order Psocodea, it belongs to a group of insects commonly known as barklice or booklice, though barklice specifically refers to the free-living species found on vegetation and bark rather than the domestic pests.
Neolepolepis
Neolepolepis is a genus of scaly-winged barklice in the family Lepidopsocidae, established by Mockford in 1993. The genus contains at least four described species distributed across the Caribbean and Central America. Members of this genus are characterized by their scale-covered wings, a defining trait of the family Lepidopsocidae. These insects are part of the order Psocodea, which includes barklice, booklice, and parasitic lice.
Neolepolepis occidentalis
Neolepolepis occidentalis is a species of scaly-winged barklouse in the family Lepidopsocidae, described by Mockford in 1955. It is one of approximately seven known species in the genus Neolepolepis. The species is found in North America, with records from the United States and Canada. As a member of the Lepidopsocidae, it possesses the characteristic scaly wings that distinguish this family within the order Psocodea.
Ophiodopelma
Ophiodopelma is a genus of barklice in the family Pseudocaeciliidae, first described by Enderlein in 1908. It belongs to the order Psocodea, a group of small, often overlooked insects commonly known as booklice, barklice, and true lice. The genus is known from Japan, though detailed biological information remains limited. As a member of Pseudocaeciliidae, it is presumed to inhabit bark or foliage environments where these insects typically feed on lichens, algae, or detritus.
Pachytroctes
Pachytroctes is a genus of small, wingless insects in the family Pachytroctidae, order Psocodea. Members of this genus are part of a group formerly known as booklice, now classified within Psocodea alongside barklice and parasitic lice. The genus was established by Enderlein in 1904 and has been recorded across multiple continents including Europe, the Americas, Asia, and Australia.
Peripsocidae
Stout Barklice
Peripsocidae is a family of barklice within the order Psocodea, suborder Psocomorpha. The family contains over 300 species distributed across 12 genera, with many recently described genera closely allied to the type genus Peripsocus. Members are characterized by wing venation lacking an areola postica, a diagnostic feature distinguishing them from related families. The family has a broad geographic distribution spanning the Oriental region, East Africa, Australia, and northern Europe.
Peripsocus alachuae
stout barklouse
Peripsocus alachuae is a species of stout barklouse in the family Peripsocidae, described by Mockford in 1971. It is known from North America, specifically the United States. As a member of Psocodea, it shares characteristics with other barklice, including small size and association with bark or foliage habitats. The species epithet references Alachua County, Florida, where the type specimen was likely collected.
Peripsocus maculosus
stout barklouse
Peripsocus maculosus is a species of barklouse described by Mockford in 1971. It belongs to the family Peripsocidae, a group of small, soft-bodied insects commonly known as stout barklice. The species is known from North America. Barklice in this family are typically found on tree bark and foliage where they feed on organic debris.
Peripsocus minimus
stout barklouse
Peripsocus minimus is a species of stout barklouse in the family Peripsocidae, described by Mockford in 1971. It belongs to the order Psocodea, which includes barklice and booklice. The species has been documented in North America, with confirmed records from the United States. As a member of Peripsocidae, it shares the family characteristic of being a "stout" barklouse, though specific details of its biology remain limited.
Peripsocus unnamed-one
A species of bark louse in the family Peripsocidae. This taxon appears to be an undescribed or informally designated species within the genus Peripsocus, which comprises small, often inconspicuous psocids associated with bark and lichen habitats. Members of this genus are generally characterized by their reduced wing venation and elongate body form.
Philotarsidae
Loving Barklice
Philotarsidae is a family of barklice within the order Psocodea, comprising approximately 150 species across eight recognized genera. The family belongs to the infraorder Philotarsetae and is closely related to Pseudocaeciliidae and Calopsocidae. A revised classification recognizes two subfamilies: Philotarsinae (tribes Philotarsini and Aaroniellini) and Zelandopsocinae. The family has been extensively studied for its systematics, phylogeny, and biogeographic patterns, particularly in relation to plate tectonics and historical fragmentation in the southwest Pacific.
Philotarsus
loving barklice
Philotarsus is a genus of barklice in the family Philotarsidae, containing approximately 18 described species. These insects are commonly known as 'loving barklice,' a name shared with related genera in the family. The genus was established by Kolbe in 1880 and is distributed across parts of North and Central America.
Philotarsus kwakiutl
loving barklouse
Philotarsus kwakiutl is a species of barklouse described by Mockford in 1951. It belongs to the family Philotarsidae, commonly referred to as 'loving barklice.' The species is documented from North America, with occurrence records from the United States and Canada. Available information on this species is limited, with only 8 observations recorded on iNaturalist as of the data source date.
Philotarsus parviceps
Philotarsus parviceps is a species of barklouse in the family Philotarsidae, described by Roesler in 1954. It belongs to the order Psocodea, a group of small insects commonly known as booklice, barklice, and true lice. As a member of the subfamily Philotarsinae, it is part of a lineage of free-living barklice that inhabit vegetation and tree bark rather than parasitic lifestyles. The species has been documented through 152 observations on iNaturalist, indicating it is not uncommon where it occurs, though detailed biological studies remain limited.
Polypsocus corruptus
Corrupt Barklouse
Polypsocus corruptus is a species of barklouse in the family Amphipsocidae, commonly known as the Corrupt Barklouse. It is one of the most frequently observed barklice in North America, with over 2,300 documented records. The species belongs to the group of 'hairy-winged barklice,' characterized by setose wing surfaces. It occurs across a broad geographic range spanning temperate and subtropical regions of North and Central America.
Propsocus pulchripennis
Propsocus pulchripennis is a species of damp barklouse in the family Elipsocidae. It has a remarkably broad cosmopolitan distribution spanning six continents, including Africa, Australia, Europe, the Americas, and Oceania. The species was originally described by Perkins in 1899 under the basionym Stenopsocus pulchripennis. As a member of the damp barklice, it inhabits moist microhabitats associated with bark and decaying wood.
Pseudocaecilius citricola
false lizard barklouse, citrus barklouse
Pseudocaecilius citricola is a species of false lizard barklouse in the family Pseudocaeciliidae. It constructs silken webs on leaf surfaces and deposits egg-batches within these protective structures. The species has a remarkably broad pantropical and subtropical distribution spanning Africa, the Americas, Asia, and Oceania, with records from over 30 countries and island groups. It has been documented on host plants including mango (Mangifera indica) and Cordia collococca in Jamaica.
Pseudorypteryx mexicana
Pseudorypteryx mexicana is a species of trogiomorphan psocid (barklouse) in the family Psyllipsocidae, described by García-Aldrete in 1984. Members of this family are small, wingless insects typically associated with dark, humid microhabitats. The genus Pseudorypteryx is characterized by reduced wing venation and other troglomorphic adaptations. This species occurs in Mexico and the United States.
Psocetae
bark lice
Psocetae is an infraorder of bark lice within the order Psocodea, established by Pearman in 1936. It comprises four families: Hemipsocidae, Myopsocidae, Psilopsocidae, and Psocidae. Members are characterized by distinctive morphological features including an oval head with a median crevice and specialized limb structures.
Pteroxanium
scaly-winged barklice
Pteroxanium is a genus of scaly-winged barklice in the family Lepidopsocidae, first described by Enderlein in 1922. The genus comprises approximately eight described species distributed across multiple continents. Members are characterized by their distinctive scaled wings, a trait that distinguishes them from many other barklice groups. The genus includes species found in both tropical and temperate regions, with records from the Americas, Europe, and insular localities.
Ptycta
barklice
Ptycta is a genus of barklice (family Psocidae) containing more than 150 described species. The genus was redefined based on the morphology of the male terminalia, specifically the forewing venation where veins Rs+M are fused for a short distance. Species occur across multiple continents including Asia, Australia, Africa, and the Americas. The genus is distinguished from the related Copostigma within the Copostigma–Ptycta complex by this wing venation character.
Ptyctini
common barklice
Ptyctini is a tribe of barklice in the family Psocidae, containing approximately 6 genera and at least 20 described species. Members are small, soft-bodied insects commonly found on bark, foliage, and other surfaces. The tribe was established by Mockford in 1993 and includes genera such as Ptycta, Steleops, and Trichadenotecnum.
Reuterella
damp barklice
Reuterella is a genus of damp barklice in the family Elipsocidae, established by Enderlein in 1903. The genus contains at least one described species, R. helvimacula. These insects belong to the order Psocodea, which includes barklice, booklice, and parasitic lice. Members of this genus are associated with moist microhabitats on bark surfaces.
Rhyopsocus bentonae
bird nest barklouse
Rhyopsocus bentonae is a barklouse species in the family Psoquillidae, described by Sommerman in 1956. It is classified within the suborder Trogiomorpha and infraorder Atropetae of the order Psocodea. The species is distributed across Central and North America. As a member of Psoquillidae, it is associated with bird nest habitats.
Rhyopsocus quercus
Rhyopsocus quercus is a species of psocid described by Mockford in 2016, belonging to the family Psoquillidae. The specific epithet 'quercus' suggests an association with oak (Quercus), though the nature of this relationship remains to be fully documented. As a member of the order Psocodea, this species is part of a group of small, often overlooked insects that occur in diverse terrestrial habitats.
Rhyopsocus texanus
Rhyopsocus texanus is a species of barklouse in the family Psoquillidae. It is distributed across Central America and North America, including the United States and Mexico. As a member of the Psocodea order, it belongs to a group of insects commonly associated with decaying organic matter and bird nests. The species was first described by Nathan Banks in 1930.
Soa
Soa is a genus of booklice in the family Lepidopsocidae, order Psocodea. These small, wingless insects inhabit sheltered microhabitats and feed on organic debris. The genus was established by Enderlein in 1904 and is currently accepted in modern classifications.
Sphaeropsocus bicolor
Sphaeropsocus bicolor is a species of booklouse in the family Sphaeropsocidae, described by Mockford in 2013. It belongs to the order Psocodea, a group of small, soft-bodied insects commonly known as barklice and booklice. The genus Sphaeropsocus is part of a family characterized by distinctive morphological features, though specific ecological details for this species remain limited. Only a single observation has been recorded in public databases.
Steleops lichenatus
Steleops lichenatus is a species of barklouse in the family Psocidae, described by Walsh in 1863. It belongs to the genus Steleops, a group of psocids characterized by their association with lichen-covered substrates. The species is known from the United States and represents part of the diverse North American psocid fauna. As with other members of Psocidae, it likely inhabits arboreal or rock-dwelling environments where lichen growth occurs.
Stimulopalpus
tropical barklice
Stimulopalpus is a genus of tropical barklice in the family Amphientomidae, containing at least 30 described species. Members of this genus are small, wingless or weakly winged insects that inhabit tropical environments. They belong to the order Psocodea, which includes barklice, booklice, and parasitic lice. The genus was established by Enderlein in 1906 and represents one of the more species-rich genera within its family.