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)
Ectopsocus perkinsi
Ectopsocus perkinsi
Ectopsocus spilotus
Ectopsocus spilotus
Ectopsocus thorntoni
Ectopsocus thorntoni
Elipsocus annulatus
Elipsocus annulatus
Elipsocus moebiusi
Elipsocus moebiusi
Embidopsocus enderleini
Embidopsocus enderleini
Embidopsocus minor
Embidopsocus minor
Epipsocus campanulatus
Epipsocus campanulatus
Epipsocus hageni
Epipsocus hageni
Epipsocus petenensis
Epipsocus petenensis
Graphopsocus mexicanus
Graphopsocus mexicanus
Hemipsocus ornatus
Hemipsocus ornatus
Hemipsocus pretiosus
Hemipsocus pretiosus
Hemipsocus rubellis
Hemipsocus rubellis
Hemipsocus selysi
Hemipsocus selysi
Hyalopsocus morio
Hyalopsocus morio
Lachesilla bernardi
Lachesilla bernardi
Lepinotus tasmaniensis
Lepinotus tasmaniensis
Lichenomima cervantesi
Lichenomima cervantesi
Lichenomima chelata
Lichenomima chelata
Lichenomima sparsa
Lichenomima sparsa
Lichenomima varia
Lichenomima varia
Liposcelis bicolor
Liposcelis bicolor
Liposcelis corrodens
Liposcelis corrodens
Liposcelis meridionalis
Liposcelis meridionalis
Liposcelis pulchra
Liposcelis pulchra
Liposcelis rufa
Liposcelis rufa
Liposcelis silvarum
Liposcelis silvarum
Liposcelis tricolor
Liposcelis tricolor
Liposcelis uxoris
Liposcelis uxoris
Lithoseopsis cervantesi
Lithoseopsis cervantesi
Lithoseopsis chamelensis
Lithoseopsis chamelensis
Lithoseopsis elongata
Lithoseopsis elongata
Lithoseopsis hystrix
Lithoseopsis hystrix
Lithoseopsis insularis
Lithoseopsis insularis
Lithoseopsis tuitensis
Lithoseopsis tuitensis
Loensia variegata
Loensia variegata
Menacanthus cornutus
Menacanthus cornutus
Menacanthus eurysternus
Menacanthus eurysternus
Mesopsocus fuscifrons
Mesopsocus fuscifrons
Mesopsocus giganteus
Mesopsocus giganteus
Mesopsocus vernus
Mesopsocus vernus
Myopsocus ambiguus
Myopsocus ambiguus
Myopsocus eatoni
Myopsocus eatoni
Nepticulomima lusiae
Nepticulomima lusiae
Pachytroctes achrosta
Pachytroctes achrosta
Pachytroctes aegyptius
Pachytroctes aegyptius
Pachytroctes ixtapaensis
Pachytroctes ixtapaensis
Pachytroctes maculosus
Pachytroctes maculosus
Pachytroctes pacificus
Pachytroctes pacificus
Peripsocus alboguttatus
Peripsocus alboguttatus
Peripsocus chamelanus
Peripsocus chamelanus
Peripsocus didymus
Peripsocus didymus
Peripsocus dolichophallus
Peripsocus dolichophallus
Peripsocus ferrugineus
Peripsocus ferrugineus
Peripsocus maoricus
Peripsocus maoricus
Peripsocus nitens
Peripsocus nitens
Peripsocus parvulus
Peripsocus parvulus
Peripsocus phaeopterus
Peripsocus phaeopterus
Philotarsus digitatus
Philotarsus digitatus
Philotarsus lobatus
Philotarsus lobatus
Philotarsus ncurvatus
Philotarsus ncurvatus
Polyplax acomydis
Polyplax acomydis
Polyplax alaskensis
Polyplax alaskensis
Polyplax gracilis
Polyplax gracilis
Polyplax hannswrangeli
Polyplax hannswrangeli
Polyplax meridionalis
Polyplax meridionalis
Polyplax reclinata
Polyplax reclinata
Polyplax rhizomydis
Polyplax rhizomydis
Polypsocus serpentinus
Polypsocus serpentinus
Pseudocaecilius criniger
Pseudocaecilius criniger
Pseudocaecilius maculosus
Pseudocaecilius maculosus
Pseudorypteryx mexicanus
Pseudorypteryx mexicanus
Psyllipsocus chamela
Psyllipsocus chamela
Psyllipsocus garciamolinai
Psyllipsocus garciamolinai
Psyllipsocus hyalinus
Psyllipsocus hyalinus
Psyllipsocus maculatus
Psyllipsocus maculatus
Psyllipsocus monticolus
Psyllipsocus monticolus
Psyllipsocus neoleonensis
Psyllipsocus neoleonensis
Psyllipsocus oculatus
Psyllipsocus oculatus
Psyllipsocus yucatan
Psyllipsocus yucatan
Rhyopsocus calakmulensis
Rhyopsocus calakmulensis
Rhyopsocus concavus
Rhyopsocus concavus
Rhyopsocus conformis
Rhyopsocus conformis
Rhyopsocus maculosus
Rhyopsocus maculosus
Rhyopsocus ocotensis
Rhyopsocus ocotensis
Rhyopsocus orthatus
Rhyopsocus orthatus
Rhyopsocus pandanicola
Rhyopsocus pandanicola
Rhyopsocus typhicola
Rhyopsocus typhicola
Ricinus brevicapitis
Ricinus brevicapitis
Ricinus dalgleishi
Ricinus dalgleishi
Ricinus marginatus
Ricinus marginatus
Ricinus meinertzhageni
Ricinus meinertzhageni
Ricinus pessimalis
Ricinus pessimalis
Ricinus picturatus
Ricinus picturatus
Ricinus vaderi
Ricinus vaderi
Solenopotes binipilosus
Solenopotes binipilosus
Solenopotes burmeisteri
Solenopotes burmeisteri
Solenopotes capreoli
Solenopotes capreoli
Solenopotes ferrisi
Solenopotes ferrisi