Barklouse
Guides
Aaroniella badonneli
loving barklouse
Aaroniella badonneli is a species of barklouse in the family Philotarsidae. It is a small psocopteran with sexual dimorphism in body size. The species is named after French entomologist André Badonnel. It has a transcontinental distribution spanning Europe, northern Asia, and North America.
Amphigerontia bifasciata
Amphigerontia bifasciata is a small barklouse species in the family Psocidae, characterized by yellowish-black coloration with two dark transverse bands. First described by Latreille in 1799 as Psocus bifasciatus, this species is widely distributed across Europe and has been introduced to North America. It inhabits diverse woody and herbaceous vegetation, feeding on epiphytic microflora.
Amphigerontia contaminata
Amphigerontia contaminata is a barklouse species in the family Psocidae, found across Europe and parts of Asia and North America. Adults are small, soft-bodied insects with either light black or brown coloration. The species has been recorded from numerous tree hosts and shows a broad geographic distribution, though it is uncommon to scarce in parts of its British and Irish range.
Amphigerontia petiolata
common barklouse
Amphigerontia petiolata is a species of barklouse in the family Psocidae. It occurs across North America and Central America. Barklice in this family are typically found on tree bark and foliage, where they feed on microflora.
Anomopsocus amabilis
fateful barklouse
Anomopsocus amabilis is a species of barklouse in the family Lachesillidae, first described by Walsh in 1862. The species is known from North America, with records from the United States and Canada. Like other members of its family, it is associated with bark habitats. The specific epithet "amabilis" (Latin for "lovely" or "pleasing") was given by the original describer. As a member of the Psocodea, it belongs to a group of insects commonly known as barklice or booklice, though the common name "fateful barklouse" has been applied to this species.
Archipsocus floridanus
ancient barklouse
Archipsocus floridanus is a species of barklouse in the family Archipsocidae, first described by Mockford in 1953. It is one of several species in the genus Archipsocus, a group sometimes referred to as "ancient barklice" within the order Psocodea. The species has been recorded across a broad geographic range spanning North, Central, and South America. Like other members of its family, it is presumed to inhabit bark and lichen microhabitats, though specific ecological details remain poorly documented.
Asiopsocus sonorensis
Asiopsocus sonorensis is a species of barklouse in the family Asiopsocidae, described by Mockford and García-Aldrete in 1976. It represents one of the few documented species in this small family of Psocodea. The species has been recorded from both North America and Central America, with the specific epithet 'sonorensis' suggesting a type locality association with the Sonoran region. A 1991 publication in The Southwestern Naturalist provided a new distributional record, augmented morphological description, and notes on its reproductive biology, indicating continued scientific interest in this poorly known taxon.
Atropsocus atratus
Atropsocus atratus is a species of barklouse in the family Psocidae, originally described as Psocus atratus by Aaron in 1883. The species is known from the United States and is part of the diverse Psocodea order, which includes booklice, barklice, and parasitic lice. As a member of the Psocidae family, it is likely associated with bark, leaf litter, or other decaying organic matter where these insects commonly feed on microflora. The genus Atropsocus contains multiple species distributed primarily in North America.
Belaphotroctes
Belaphotroctes is a genus of small psocids (barklice and booklice) in the family Liposcelididae. Members of this genus are minute, dorsoventrally flattened insects adapted to living in concealed microhabitats such as leaf litter, bark crevices, and stored products. The genus was established by Roesler in 1943 and has been recorded from both the New World (USA, Mexico, Jamaica) and Africa (Angola, Togo).
Bertkauia crosbyana
elliptical barklouse
Bertkauia crosbyana is a species of elliptical barklouse described by Chapman in 1930. It belongs to the family Epipsocidae, a group of free-living barklice within the order Psocodea. The species has been documented across a broad geographic range spanning North and Central America. As a member of the Epipsocidae, it is associated with bark and lichen habitats typical of this family.
Bertkauia lepicidinaria
elliptical barklouse
Bertkauia lepicidinaria is a species of elliptical barklouse in the family Epipsocidae, first described by Chapman in 1930. It is found in North America, with records from the United States and Canada. Like other members of its family, it belongs to the order Psocodea, which includes barklice and booklice. The species is documented through limited observations, with only 5 records on iNaturalist as of the available data.
Blaste garciorum
common barklouse
Blaste garciorum is a species of barklouse in the family Psocidae, described by Mockford in 1984. It is distributed across Central America and North America, including Mexico. As a member of Psocidae, it is part of a group of small, soft-bodied insects commonly known as barklice or booklice that inhabit tree bark and other surfaces. The species epithet 'garciorum' honors individuals with the surname García, though the specific honorees are not documented in available sources.
Blaste longipennis
common barklouse
Blaste longipennis is a species of barklouse in the family Psocidae. It is known from North America. Information on its biology and ecology is limited.
Blaste opposita
common barklouse
Blaste opposita is a species of barklouse in the family Psocidae, described by Banks in 1907. It is one of the more frequently encountered barklouse species in North America. Barklice are small, soft-bodied insects that typically inhabit bark, foliage, and other surfaces where they feed on organic debris, algae, and lichens. The species is considered harmless to humans and plays a role in nutrient cycling in forest and urban ecosystems.
Blaste oregona
common barklouse
Blaste oregona is a species of barklouse in the family Psocidae. It was first described by Nathan Banks in 1900. The species is found in North America, particularly in the United States. Barklice are small, soft-bodied insects that typically inhabit bark, leaf litter, and other organic substrates where they feed on microflora.
Blaste osceola
common barklouse
Blaste osceola is a species of barklouse in the family Psocidae, described by Mockford in 1984. It is a member of the order Psocodea, a group of small, soft-bodied insects commonly found on bark, foliage, and other surfaces. The species is known from North America.
Blaste persimilis
common barklouse
Blaste persimilis is a species of barklouse in the family Psocidae, first described by Banks in 1908. It is found in North America, with records from the United States. As a member of Psocidae, it belongs to a group of small, soft-bodied insects commonly known as barklice or booklice that typically inhabit bark, leaf litter, and other organic substrates. The species is part of a diverse genus within a family that includes many common and widespread barklouse species.
Blaste posticata
common barklouse
Blaste posticata is a species of barklouse in the family Psocidae. It belongs to the genus Blaste, which comprises small, winged insects commonly found on tree bark and foliage. The species was described by Nathan Banks in 1905 and is distributed across Central America and North America, including Mexico and the United States.
Blaste quieta
common barklouse
Blaste quieta is a species of barklouse in the family Psocidae, first described by Hagen in 1861. It is found in Central America and North America. Barklice in this family are typically associated with tree bark and other woody substrates, where they feed on microflora including algae, lichens, and organic debris.
Blastopsocus lithinus
common barklouse
Blastopsocus lithinus is a species of barklouse in the family Psocidae, first described by Chapman in 1930. It is one of several species in the genus Blastopsocus, which are commonly known as barklice. The species occurs across a broad geographic range spanning temperate and tropical regions of North and Central America. Like other members of Psocidae, it is associated with bark and lichen habitats.
Blastopsocus variabilis
common barklouse
Blastopsocus variabilis is a species of barklouse in the family Psocidae. It has been documented in Central America and North America, with distribution records from the United States and Panama. As a member of Psocidae, it belongs to a group of small, soft-bodied insects commonly found on bark, foliage, and other surfaces. The species was described by Aaron in 1883.
Blastopsocus walshi
Blastopsocus walshi is a species of barklouse in the family Psocidae, described by Mockford in 2002. It belongs to a group of small, soft-bodied insects commonly known as psocids or booklice. The genus Blastopsocus contains multiple species distributed primarily in North America. This species is part of the diverse order Psocodea, which includes both free-living barklice and parasitic lice.
Camelopsocus bactrianus
Camelopsocus bactrianus is a species of barklouse described by Mockford in 1984. It belongs to the family Psocidae, a group of small, soft-bodied insects commonly found on vegetation, bark, and leaf litter. The genus Camelopsocus is part of the tribe Ptyctini, characterized by distinctive wing-rolling behavior and morphology. Very few observations of this species exist in public databases.
Camelopsocus hiemalis
Camelopsocus hiemalis is a small, winter-active barklouse (order Psocodea, family Psocidae) described by Mockford in 1984. It belongs to a monobasic genus, meaning it is the sole species in Camelopsocus. The species is endemic to a restricted area of the Front Ranges in Colorado, USA, where it has been observed active during warm winter days. Its specific epithet 'hiemalis' (Latin for 'of winter') reflects this unusual seasonal activity pattern.
Camelopsocus similis
common barklouse
Camelopsocus similis is a species of barklouse in the family Psocidae, described by Mockford in 1965. It belongs to the order Psocodea, a group of small, soft-bodied insects commonly found on vegetation, bark, and leaf litter. The species has been documented in Central America and North America, including Mexico. As with other psocids, it likely inhabits moist microhabitats and feeds on organic detritus, though specific ecological studies are limited.
Cerastipsocus trifasciatus
common barklouse
Cerastipsocus trifasciatus is a barklouse species in the family Psocidae, described by Provancher in 1876. It is widely distributed across the Americas, with records from North America (Canada, USA, Mexico), Central America (Costa Rica, Guatemala, Nicaragua, Panama), and South America (Colombia, Venezuela). As a member of the Psocidae, it inhabits bark and related microhabitats.
Cerastipsocus venosus
Tree Cattle, Common Barklouse
Cerastipsocus venosus is a widespread barklouse species in the family Psocidae, commonly known as "Tree Cattle" due to the herding behavior of its nymphs. It occurs across North America, Central America, and the Caribbean. Both nymphs and adults aggregate on tree bark and foliage, where they feed on lichens and other organic matter. The species is harmless to plants and plays a role in nutrient cycling.
Cerobasis annulata
Cerobasis annulata is a species of barklouse in the family Trogiidae, first described by Hagen in 1865. It is a small, wingless insect found across much of western and central Europe, including the British Isles, and has also been recorded from the Azores, Madeira, and Cyprus. The species belongs to the order Psocodea, which includes both barklice and parasitic lice.
Clinopsocus nigrescens
Clinopsocus nigrescens is a species of barklouse in the family Elipsocidae, described by Mockford in 2018. It belongs to the order Psocodea, a group of small, often overlooked insects that includes both parasitic lice and free-living barklice and booklice. The genus Clinopsocus is classified within the subfamily Pseudopsocinae. As a recently described species, detailed biological information remains limited.
Cuneopalpus cyanops
Cuneopalpus cyanops is a species of damp barklouse in the family Elipsocidae. It is the sole described species in its genus. The species has a broad distribution across Europe, northern Asia, and North America. Adults are orange in coloration.
Dorypteryx domestica
cave barklouse
Dorypteryx domestica is a small psocid, commonly known as the cave barklouse, in the family Psyllipsocidae. Originally described as Dolopteryx domestica from Zimbabwe in 1958, it was later transferred to Dorypteryx by Lienhard in 1977. The species has a remarkably broad geographic distribution spanning Africa, Europe, Northern Asia, and North America, and has been recorded from domestic as well as cave habitats.
Echmepteryx hageni
scaly-winged barklouse
Echmepteryx hageni is a species of scaly-winged barklouse in the family Lepidopsocidae, first described by Packard in 1870. It is one of approximately 70 species in the genus Echmepteryx. The species is known from North America, with records from the United States and Canada including Vermont. As a member of the Lepidopsocidae, it possesses the characteristic broad, scaled wings that give the family its common name.
Echmepteryx intermedia
scaly-winged barklouse
Echmepteryx intermedia is a species of scaly-winged barklouse in the family Lepidopsocidae, described by Mockford in 1974. It belongs to a group of small, cryptic insects characterized by scales covering their wings and body. The species has been documented across a broad geographic range spanning the Caribbean, Central America, and North America.
Ectopsocopsis cryptomeriae
Large-winged Psocid
Ectopsocopsis cryptomeriae is a species of outer barklouse known as the large-winged psocid. It belongs to the family Ectopsocidae and has a remarkably broad geographic distribution spanning six continents. The species was first described by Enderlein in 1907 under the basionym Ectopsocus cryptomeriae. It is one of the more frequently observed psocids, with substantial iNaturalist documentation.
Ectopsocus californicus
outer barklouse
Ectopsocus californicus is a species of outer barklouse in the family Ectopsocidae, first described by Banks in 1903. Originally described as Peripsocus californicus, it has since been reclassified to the genus Ectopsocus. The species exhibits a broad geographic distribution spanning multiple continents including North America, Central America, and Australia, with records also from New Zealand. As an outer barklouse, it inhabits the exterior surfaces of tree bark rather than living beneath it.
Ectopsocus meridionalis
Ectopsocus meridionalis is a species of outer barklouse in the family Ectopsocidae. It has been recorded across an exceptionally broad geographic range spanning six continents, including Africa, Europe, Asia, the Americas, and Oceania. The species was described by Ribaga in 1904. Its widespread distribution suggests either high dispersal capability or cryptic species diversity, though specific ecological studies remain limited.
Ectopsocus richardsi
outer barklouse
Ectopsocus richardsi is a species of outer barklouse in the family Ectopsocidae, first described by Pearman in 1929. The species exhibits an exceptionally broad geographic distribution spanning six continents, with documented occurrences across Africa, Australia, Europe, Northern Asia, Central America, North America, Oceania, South America, and Southern Asia. This cosmopolitan range is notable among barklice and suggests either high dispersal capability or cryptic species status. The species is classified within the order Psocodea, which includes both parasitic lice and free-living barklice.
Ectopsocus strauchi
outer barklouse
Ectopsocus strauchi is a species of outer barklouse in the family Ectopsocidae. It has a remarkably broad global distribution spanning six continents. The species was described by Enderlein in 1906. As an outer barklouse, it inhabits the surface of tree bark rather than living beneath it.
Ectopsocus vachoni
outer barklouse
Ectopsocus vachoni is an outer barklouse species described by Badonnel in 1945. It has been recorded across multiple continents including Africa, Australia, Europe, the Americas, and parts of Asia. As a member of the family Ectopsocidae, it inhabits outer bark surfaces of trees. The species shows a notably broad geographic distribution for a barklouse.
Elipsocus abdominalis
Elipsocus abdominalis is a species of barklouse in the family Elipsocidae. It occurs across much of Europe, with records from Great Britain and Ireland through Scandinavia, central Europe, and the Mediterranean. The species has also been recorded in North America, though these may represent introduced populations. Adults are blackish-orange in coloration and have been observed feeding on a range of deciduous and coniferous trees.
Elipsocus hyalinus
Elipsocus hyalinus is a species of barklouse in the family Elipsocidae, characterized by yellowish-black coloration. It is widely distributed across Europe, with additional records from North America, North Africa, and parts of Asia. The species feeds on diverse plant material including fruits, berries, and foliage of numerous tree and shrub species.
Elipsocus obscurus
Elipsocus obscurus is a species of damp barklouse in the family Elipsocidae, described by Mockford in 1980. It is distributed across Central America and North America, including the United States and Mexico. As a member of Psocodea, it belongs to a group of small, often overlooked insects commonly associated with moist habitats.
Hemipsocus africanus
Hemipsocus africanus is a species of barklouse in the family Hemipsocidae, first described by Enderlein in 1907. It belongs to the order Psocodea, which encompasses both barklice and true lice. The species has been documented across a broad geographic range spanning sub-Saharan Africa, parts of Central America, and several island systems including the Krakatau Islands and Seychelles. Its wide distribution suggests either natural dispersal capabilities or human-mediated transport, though specific mechanisms remain undocumented.
Hemipsocus chloroticus
leaf litter barklouse
Hemipsocus chloroticus is a species of leaf litter barklouse in the family Hemipsocidae, first described by Hagen in 1858. It has an exceptionally broad geographic distribution spanning Africa, Central America, North America, Oceania, and Southern Asia. The species belongs to the order Psocodea, a group formerly split between barklice/booklice (Psocoptera) and parasitic lice (Phthiraptera). As a member of Hemipsocidae, it is associated with leaf litter habitats rather than living foliage.
Hyalopsocus floridanus
common barklouse
Hyalopsocus floridanus is a species of barklouse in the family Psocidae, first described by Banks in 1905. It is a small, winged insect that inhabits bark and foliage surfaces. The species is distributed across North America, with records from both the United States and Canada. As a member of the 'common barklice' group, it contributes to the decomposition of organic material in forest and woodland ecosystems.
Hyalopsocus striatus
common barklouse
Hyalopsocus striatus is a species of barklouse in the family Psocidae. It is found in North America, with records from the United States and Canada. As a member of the Psocidae, it is part of a group of small, soft-bodied insects commonly known as barklice or booklice, which are typically associated with tree bark, leaf litter, and other decaying organic matter. The species was described by Francis Walker in 1853.
Indiopsocus bisignatus
common barklouse
Indiopsocus bisignatus is a species of barklouse in the family Psocidae, first described by Banks in 1904. The species is distributed across parts of North and Central America, with records from the United States, Mexico, and Honduras. Barklice in this family are typically found in association with tree bark, lichens, and other surface substrates where they feed on microflora.
Indiopsocus campestris
common barklouse
Indiopsocus campestris is a species of barklouse in the family Psocidae, originally described by Aaron in 1886. It is found in the Caribbean Sea and North America. Barklice are small, soft-bodied insects that are easily mistaken for planthoppers or tiny moths but possess chewing mouthparts rather than piercing-sucking or siphoning mouthparts.
Indiopsocus ceterus
common barklouse
Indiopsocus ceterus is a species of barklouse in the family Psocidae, first described by Mockford in 1974. It is a small, winged insect that inhabits bark and foliage surfaces. The species is known from the Caribbean Sea region and North America, including Cuba and the United States. It has been documented at blacklight stations, indicating nocturnal activity.
Indiopsocus coquilletti
common barklouse
Indiopsocus coquilletti is a species of barklouse in the family Psocidae. It is found in Central America and North America, including the United States and Mexico. Barklice in this family are commonly encountered on bark, foliage, and other surfaces where they feed on organic debris.