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)
Speleketor iriwini
Speleketor iriwini
Speleketor pictus
Speleketor pictus
Sphaeropsocus kuenowii
Sphaeropsocus kuenowii
Stimulopalpus distinctus
Stimulopalpus distinctus
Stimulopalpus pentospilus
Stimulopalpus pentospilus
Tapinella bannana
Tapinella bannana
Tapinella bicolorata
Tapinella bicolorata
Tapinella chamelana
Tapinella chamelana
Tapinella olmeca
Tapinella olmeca
Tapinella picta
Tapinella picta
Tapinella vittata
Tapinella vittata
Trichadenotecnum sexpunctatum
Trichadenotecnum sexpunctatum
Trichodectes octomaculatus
Trichodectes octomaculatus
Tricholipeurus lipeuroides
Tricholipeurus lipeuroides
Tricholipeurus parallelus
Tricholipeurus parallelus
Trichopsocus brincki
Trichopsocus brincki
Trichopsocus coloratus
Trichopsocus coloratus
Trichopsocus fastuosus
Trichopsocus fastuosus
Trichopsocus maculosus
Trichopsocus maculosus
Trichopsocus marmoratus
Trichopsocus marmoratus
Trogium braheicola
Trogium braheicola
Trogium evansorum
Trogium evansorum
Valenzuela atricornis
Valenzuela atricornis
Valenzuela corsicus
Valenzuela corsicus
Valenzuela gynapterus
Valenzuela gynapterus
Valenzuela mueggenburgi
Valenzuela mueggenburgi
Valenzuela okamotoi
Valenzuela okamotoi
Valenzuela piceus
Valenzuela piceus
Xanthocaecilius anahuacensis
Xanthocaecilius anahuacensis
Xanthocaecilius brevicornis
Xanthocaecilius brevicornis
Xanthocaecilius costaricensis
Xanthocaecilius costaricensis
Xanthocaecilius granulosus
Xanthocaecilius granulosus
Xanthocaecilius microphthalmus
Xanthocaecilius microphthalmus
Aaroniella achrysa
Aaroniella achrysa
Amphigerontia bifasciata
Amphigerontia bifasciata
Amphigerontia contaminata
Amphigerontia contaminata
Amphigerontia montivaga
Amphigerontia montivaga
Amphigerontia petiolata
Amphigerontia petiolata
Anomopsocus amabilis
Anomopsocus amabilis
Archipsocus floridanus
Archipsocus floridanus
Archipsocus nomas
Archipsocus nomas
Asiopsocus sonorensis
Asiopsocus sonorensis
Atropsocus atratus
Atropsocus atratus
Badonnelia titei
Badonnelia titei
Belaphotroctes badonneli
Belaphotroctes badonneli
Belaphotroctes ghesquierei
Belaphotroctes ghesquierei
Belaphotroctes undescribed
Belaphotroctes undescribed
Blaste garciorum
Blaste garciorum
Blaste longipennis
Blaste longipennis
Blaste oregona
Blaste oregona
Blaste persimilis
Blaste persimilis
Blaste posticata
Blaste posticata
Blaste quieta
Blaste quieta
Blaste subquieta
Blaste subquieta
Blastopsocus johnstoni
Blastopsocus johnstoni
Blastopsocus lithinus
Blastopsocus lithinus
Blastopsocus semistriatus
Blastopsocus semistriatus
Blastopsocus variabilis
Blastopsocus variabilis
Blastopsocus walshi
Blastopsocus walshi
Brueelia brunneinucha
Brueelia brunneinucha
Buffalo Louse
Haematopinus tuberculatus
Camelopsocus bactrianus
Camelopsocus bactrianus
Camelopsocus similis
Camelopsocus similis
Camelopsocus tucsonensis
Camelopsocus tucsonensis
Cebid Louse
Pediculus mjobergi
Cerastipsocus trifasciatus
Cerastipsocus trifasciatus
Cerobasis guestfalica
Cerobasis guestfalica
Chilenocaecilius ornatipennis
Chilenocaecilius ornatipennis
Chimpanzee Louse
Pediculus schaeffi
Common Barklice
Metylophorus novaescotiae
Common Goat Louse
Damalinia caprae
Cosmopolitan Grain Barklouse
Lachesilla pedicularia
Crab Louse
Pthirus pubis
Cuneopalpus cyanops
Cuneopalpus cyanops
Dog Biting Louse
Trichodectes canis
Dorypteryx domestica
Dorypteryx domestica
Echmepteryx hageni
Echmepteryx hageni
Echmepteryx intermedia
Echmepteryx intermedia
Echmepteryx youngi
Echmepteryx youngi
Ectopsocus meridionalis
Ectopsocus meridionalis
Ectopsocus richardsi
Ectopsocus richardsi
Ectopsocus strauchi
Ectopsocus strauchi
Ectopsocus thibaudi
Ectopsocus thibaudi
Ectopsocus vachoni
Ectopsocus vachoni
Elipsocus abdominalis
Elipsocus abdominalis
Elipsocus obscurus
Elipsocus obscurus
Elipsocus pumilis
Elipsocus pumilis
Embidopsocus needhami
Embidopsocus needhami
Gorilla Louse
Pthirus gorillae
Granary Book Louse
Lepinotus patruelis
Hemipsocus africanus
Hemipsocus africanus
Hog Louse
Haematopinus suis
Horse Sucking Louse
Haematopinus asini
House Rat Louse
Polyplax spinulosa
Human Louse
Pediculus humanus
Hyalopsocus floridanus
Hyalopsocus floridanus
Hyalopsocus striatus
Hyalopsocus striatus
Indiopsocus bisignatus
Indiopsocus bisignatus
Indiopsocus campestris
Indiopsocus campestris
Indiopsocus coquilletti
Indiopsocus coquilletti