Barklice, Booklice, and Parasitic Lice
Order Psocodea
The Barklice, Booklice, and Parasitic Lice (Order Psocodea) includes 435 species across 37 families and 90 genera in our directory.
About Barklice, Booklice, and Parasitic Lice
Psocodea includes ~11,000 described species of booklice, barklice, and parasitic lice. Booklice (Psocoptera) are among the most common household insects, thriving in humid environments where they feed on mold and fungi.
Economic Impact
Head lice (Pediculus humanus capitis) affect an estimated 6-12 million children aged 3-11 in the U.S. annually (CDC). The U.S. lice treatment market is valued at over $1 billion per year.
Ecological Role
Barklice are important decomposers that feed on algae, lichens, and fungi on tree bark. They help recycle nutrients in forest ecosystems. Parasitic lice have co-evolved with their hosts for millions of years, providing insights into host evolutionary history.
Families in Psocodea (37)
Species in Psocodea (435)
Indiopsocus infumatus
Indiopsocus infumatus
Indiopsocus lanceolatus
Indiopsocus lanceolatus
Indiopsocus palmatus
Indiopsocus palmatus
Indiopsocus sp.
Indiopsocus new-to-fauna
Indiopsocus texanus
Indiopsocus texanus
Kaestneriella fumosa
Kaestneriella fumosa
Lachesilla andra
Lachesilla andra
Lachesilla anna
Lachesilla anna
Lachesilla arida
Lachesilla arida
Lachesilla bottimeri
Lachesilla bottimeri
Lachesilla centralis
Lachesilla centralis
Lachesilla contraforcepeta
Lachesilla contraforcepeta
Lachesilla corona
Lachesilla corona
Lachesilla dona
Lachesilla dona
Lachesilla floridana
Lachesilla floridana
Lachesilla forcepeta
Lachesilla forcepeta
Lachesilla kathrynae
Lachesilla kathrynae
Lachesilla kola
Lachesilla kola
Lachesilla major
Lachesilla major
Lachesilla michiliensis
Lachesilla michiliensis
Lachesilla nita
Lachesilla nita
Lachesilla nubilis
Lachesilla nubilis
Lachesilla otomi
Lachesilla otomi
Lachesilla pacifica
Lachesilla pacifica
Lachesilla pallida
Lachesilla pallida
Lachesilla quercus
Lachesilla quercus
Lachesilla rena
Lachesilla rena
Lachesilla rufa
Lachesilla rufa
Lachesilla sulcata
Lachesilla sulcata
Lachesilla tectorum
Lachesilla tectorum
Lachesilla texana
Lachesilla texana
Lachesilla typhicola
Lachesilla typhicola
Lachesilla yucateca
Lachesilla yucateca
Large Turkey Louse
Chelopistes meleagridis
Large-winged Psocid
Ectopsocopsis cryptomeriae
Lepinotus inquilinus
Lepinotus inquilinus
Lichenomima cf. sparsa
Lichenomima cf-sparsa
Lichenomima coloradensis
Lichenomima coloradensis
Lichenomima lugens
Lichenomima lugens
Liposcelis brunnea
Liposcelis brunnea
Liposcelis decolor
Liposcelis decolor
Liposcelis deltachi
Liposcelis deltachi
Liposcelis entomophila
Liposcelis entomophila
Liposcelis fusciceps
Liposcelis fusciceps
Liposcelis hirsutoides
Liposcelis hirsutoides
Liposcelis nigra
Liposcelis nigra
Liposcelis ornata
Liposcelis ornata
Liposcelis pallida
Liposcelis pallida
Liposcelis pearmani
Liposcelis pearmani
Liposcelis priesneri
Liposcelis priesneri
Loensia conspersa
Loensia conspersa
Loensia maculosa
Loensia maculosa
Loensia undescribed
Loensia undescribed
Maoripsocus africanus
Maoripsocus africanus
Maoripsocus semifuscatus
Maoripsocus semifuscatus
Mesopsocus immunis
Mesopsocus immunis
Mesopsocus laticeps
Mesopsocus laticeps
Mesopsocus unipunctatus
Mesopsocus unipunctatus
Nanopsocus oceanicus
Nanopsocus oceanicus
Neolepolepis occidentalis
Neolepolepis occidentalis
Peripsocus alachuae
Peripsocus alachuae
Peripsocus maculosus
Peripsocus maculosus
Peripsocus madescens
Peripsocus madescens
Peripsocus milleri
Peripsocus milleri
Peripsocus minimus
Peripsocus minimus
Peripsocus stagnivagus
Peripsocus stagnivagus
Peripsocus unnamed-one
Peripsocus unnamed-one
Peritroctes bengalensis
Peritroctes bengalensis
Peters' barklouse
Ectopsocus petersi
Philotarsus arizonicus
Philotarsus arizonicus
Philotarsus californicus
Philotarsus californicus
Philotarsus kwakiutl
Philotarsus kwakiutl
Philotarsus parviceps
Philotarsus parviceps
Philotarsus picicornis
Philotarsus picicornis
Poultry Body Louse
Menacanthus stramineus
Propsocus pulchripennis
Propsocus pulchripennis
Pseudocaecilius citricola
Pseudocaecilius citricola
Pseudorypteryx mexicana
Pseudorypteryx mexicana
Psocathropos lachlani
Psocathropos lachlani
Psocid Barklice
Cerastipsocus venosus
Psocus crosbyi
Psocus crosbyi
Psyllipsocus apache
Psyllipsocus apache
Psyllipsocus decoratus
Psyllipsocus decoratus
Psyllipsocus ramburii
Psyllipsocus ramburii
Pteroxanium kelloggi
Pteroxanium kelloggi
Ptycta lineata
Ptycta lineata
Pygmy Hog-sucking Louse
Haematopinus oliveri
Reticulate-winged Trogiid
Lepinotus reticulatus
Reuterella helvimacula
Reuterella helvimacula
Rhyopsocus bentonae
Rhyopsocus bentonae
Rhyopsocus eclipticus
Rhyopsocus eclipticus
Rhyopsocus texanus
Rhyopsocus texanus
Shortnosed Cattle Louse
Haematopinus eurysternus
Solenopotes capillatus
Solenopotes capillatus
Sphaeropsocus bicolor
Sphaeropsocus bicolor
Steleops elegans
Steleops elegans
Steleops lichenatus
Steleops lichenatus
Steleops undescribed
Steleops undescribed
Tapinella maculata
Tapinella maculata
Tapinella undescribed
Tapinella undescribed