Oak-associated
Guides
Peripsocus milleri
Peripsocus milleri is a species of barklouse in the family Peripsocidae, characterized by brown coloration. The species has been recorded across multiple regions including Great Britain, Ireland, continental Europe, and several Atlantic island groups. It is associated with oak trees as a feeding substrate.
Phoberia
Phoberia is a genus of moths in the family Erebidae, subfamily Erebinae, established by Jacob Hübner in 1818. The genus contains at least two recognized species, including Phoberia atomaris (common oak moth) and Phoberia ingenua. Species in this genus are associated with oak-dominated habitats. The genus is native to North America, with documented observations from the United States including Vermont.
Phyllonorycter fitchella
A small leaf-mining moth in the family Gracillariidae with a wingspan of 7.5–8 mm. Larvae create mines in leaves of Quercus (oak) species. Adults are active from March to October in at least some portions of the range.
Phymatodes obliquus
Phymatodes obliquus is a species of longhorn beetle in the family Cerambycidae. It was formerly confused with P. decussatus due to misapplication of that name by Linsley (1964), but was correctly identified as a distinct species by Swift & Ray (2010). The species is primarily associated with oak (Quercus) hosts in western North America.
Pigritia nr-murtfeldtella-one
Pigritia nr-murtfeldtella-one is an undescribed or near-species member of the genus Pigritia, a group of small moths in the family Coleophoridae (case-bearer moths). The "nr" designation indicates morphological or genetic similarity to P. murtfeldtella, a described North American species, but not confirmed conspecificity. Members of this genus are characterized by their minute size and the larval habit of constructing portable cases from silk and plant material. This taxon is known from North American records, particularly in association with oak and other woody plants.
Platycotis
Platycotis is a genus of treehoppers in the family Membracidae, comprising approximately 13 described species. The genus is characterized by pronounced pronotal modifications typical of the family. The best-studied species, P. vittata (the oak treehopper), exhibits presocial behavior including maternal egg guarding and nymphal aggregations. Species in this genus are associated with woody host plants, particularly oaks.
Platycotis acutangula
Platycotis cf. acutangula is a treehopper species (family Membracidae) documented in dry-mesic oak-hickory forests of the Missouri Ozarks. The genus Platycotis is characterized by distinctive pronotal expansions that form various shapes and projections. This record represents a tentative identification (cf. = confer, meaning "compare with") based on morphological similarity to P. acutangula. Treehoppers in this genus are typically associated with oak species (Quercus), where they feed on phloem sap.
Polycesta
jewel beetles
Polycesta is a genus of jewel beetles (family Buprestidae) in the subfamily Polycestinae, tribe Polycestini. The genus contains approximately 60 described species distributed across North America, the Neotropics, and parts of the Palearctic region. Several species have been documented breeding in dead wood of various host plants, particularly in oak and mesquite habitats. The genus was established by Dejean in 1833 and includes notable species such as P. arizonica, P. californica, and P. cazieri, the latter having been reared from Cercocarpus (mountain mahogany).
Polycesta arizonica
Sky Island Polycesta
Polycesta arizonica is a species of metallic wood-boring beetle in the family Buprestidae, commonly known as the Sky Island Polycesta. It belongs to the subgenus Polycesta (Arizonica) and is found in the Sky Islands region of southeastern Arizona. The species is associated with oak-juniper woodland habitats at moderate elevations.
Polycesta californica
Polycesta californica is a species of metallic wood-boring beetle in the family Buprestidae, first described by LeConte in 1857. It belongs to the subgenus Tularensia within the genus Polycesta. The species is native to western North America, with records from California and surrounding regions. As a member of the jewel beetle family, it exhibits the characteristic metallic coloration typical of Buprestidae.
Povolnya quercinigrella
Povolnya quercinigrella is a small moth in the family Gracillariidae, first described by Ely in 1915. The species was formerly placed in the genus Caloptilia, which explains older literature references. It is primarily known from eastern and central North America, with records spanning from Florida to Maine and west to Illinois and Texas.
Prionus heroicus
Heroic prionus
Prionus heroicus is one of the largest long-horned beetles in North America, with males reaching substantial size. The species occurs in oak and pine-juniper woodlands of the southwestern United States and adjacent Mexico, with larvae developing underground as root-feeders. Adults are active during both day and night and are attracted to prionic acid lures, though males typically cannot locate the precise source and instead circle or search nearby. The species exhibits a defensive posture when disturbed, raising its anterior body off the ground.
Psallus
Psallus is a genus of plant bugs in the family Miridae, subfamily Phylinae, comprising over 160 described species. The genus is predominantly Palearctic in distribution, with some species demonstrating Holarctic ranges and several having been introduced to the Nearctic region. Species are generally small, often measuring under 4 mm, with many exhibiting reddish or orange coloration. Host plant associations have been documented for several species, primarily with woody plants including oaks (Quercus), willows (Salix), and birch (Betula).
Psilocorsis cirrhoptera
Psilocorsis cirrhoptera is a small moth in the family Depressariidae, described by Ronald W. Hodges in 1961. It is known from Arizona, North America, where adults have been recorded in July. The species is one of several Psilocorsis moths whose leaf-tying caterpillars are hunted by mason wasps as prey. The wingspan is approximately 19 mm.
Psilocorsis quercicella
oak leaftier moth, oak leaf-tying psilocorsis moth
Psilocorsis quercicella is a small moth in the family Depressariidae whose larvae construct leaf shelters by tying oak leaves together. The species is known from the eastern and central United States. Larvae skeletonize oak leaves and serve as prey for parasitoid wasps, including mason wasps in the genus Ancistrocerus. The moth has been observed to have a community of parasitoid species attacking its larval stage.
Pterocolus ovatus
thief weevil, leaf roll thief
Pterocolus ovatus is a small weevil known as the thief weevil or leaf roll thief. It is an obligate kleptoparasite that exploits the leaf nests constructed by the oak leaf-rolling weevil, Homoeolabus analis. The species is found in North America, with records from the United States and Canada.
Purpuricenus humeralis
Red Triangle Long-horned Beetle
Purpuricenus humeralis is a large, showy longhorn beetle in the family Cerambycidae, first described by Fabricius in 1798. It is distinguished from congeners by triangular red or orange markings on the humeri (shoulders) of the elytra, rather than transverse bands covering the basal half. The species occurs in northeastern North America and is attracted to fermenting bait traps. It is one of three similar Purpuricenus species in eastern North America, historically confused with P. axillaris until careful study revealed consistent morphological differences.
Purpuricenus opacus
Purpuricenus opacus is a species of longhorned beetle in the family Cerambycidae, described by Knull in 1937. It is considered a west Texas specialty that has been recently documented from oak in the Lincoln National Forest of Eddy County, New Mexico, expanding its known range beyond Texas. The species is associated with oak woodlands in pinyon/oak/juniper habitats.
Pyromorpha latercula
Pyromorpha latercula is a species of forester moth in the family Zygaenidae. It belongs to a Müllerian mimicry complex involving net-winged beetles (family Lycidae), particularly species with black-and-orange warning coloration. Like other members of its genus, this species produces hydrogen cyanide as a defensive compound across all life stages. The species has been documented in limited observations, with 11 records on iNaturalist as of the source date.
Quernaspis quercus
Oak Scale
Quernaspis quercus is a scale insect in the family Diaspididae, commonly known as the Oak Scale. It is a member of the armored scales, characterized by a protective waxy covering. The species is associated with oaks (Quercus spp.) as its host plants. It occurs in North America, with records from the United States and Mexico. As with other diaspidid scales, it is a plant-feeding insect that lives attached to host plant tissues.
Quernocoris caliginosus
Quernocoris caliginosus is a species of plant bug in the family Miridae, described by Weirauch in 2006. It is a true bug (Hemiptera: Heteroptera) belonging to the large and diverse mirid fauna of western North America. The genus Quernocoris is associated with oak (Quercus) habitats, reflecting its etymology. As a recently described species, detailed natural history information remains limited in the primary literature.
Rhabdomiris striatellus
Striped Oak Bug
Rhabdomiris striatellus is a mirid bug distributed across the Palearctic region, from Europe through Asia Minor to the Caucasus. The species is strongly associated with oak trees (Quercus spp.). Adults measure 7–9 mm and display variable coloration from yellow to reddish-brown with distinctive wing patterning. The species exhibits life stage-dependent feeding habits: nymphs feed on plant material while adults are predatory.
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.
Rugosana querci
Rugosana querci is a leafhopper species in the family Cicadellidae, first described by DeLong in 1942. The species is associated with oak (Quercus) hosts, as indicated by its specific epithet. It is known to be attracted to artificial lights at night. The genus Rugosana belongs to the tribe Gyponini, a group of leafhoppers characterized by their distinctive morphology. Distribution records indicate presence across multiple U.S. states in the eastern and southwestern regions.
Satyrium
Satyrid Hairstreaks
Satyrium is a genus of butterflies in the family Lycaenidae, commonly known as satyrid hairstreaks. Species in this genus are distributed across the Holarctic ecozone. Many species exhibit specialized ecological associations, including larval dependencies on particular oak species and mutualistic relationships with ants. Several species have been the focus of conservation concern due to habitat specificity and perceived rarity.
Satyrium californicum
California Hairstreak
Satyrium californicum is a species of hairstreak butterfly in the family Lycaenidae. It belongs to a genus of small butterflies whose larvae typically feed on oaks and other woody plants. Adults in this genus often exhibit canopy-dwelling behavior and may utilize non-nectar food sources such as honeydew and plant exudates. The specific ecology of S. californicum has been less documented than some congeners, though it shares the genus-typical association with ant mutualists and woody host plants.
Satyrium edwardsii
Edwards' Hairstreak
Satyrium edwardsii, the Edwards' Hairstreak, is a butterfly in the family Lycaenidae. It occurs in eastern North America from the United States into southern Canada. Larvae feed on Quercus species, particularly scrub oak (Q. ilicifolia). The species has been documented as endangered in some regions and exhibits myrmecophilous associations with ants.
Satyrium favonius
Oak Hairstreak, Southern Hairstreak
Satyrium favonius, commonly known as the Oak Hairstreak or Southern Hairstreak, is a small butterfly in the family Lycaenidae with a wingspan of 22–38 mm. The species is distributed across the eastern and central United States, from southern New England and the Atlantic Coast south to peninsular Florida and west to central Illinois, southeastern Colorado, and the Gulf Coast. The larvae feed on Quercus (oak) species, consuming leaves, buds, and male catkins. The species overwinters as an egg.
Satyrium favonius ontario
Northern Oak Hairstreak
Satyrium favonius ontario, the Northern Oak Hairstreak, is a canopy-dwelling butterfly subspecies found in the northeastern United States. Its perceived rarity appears largely due to detection difficulties rather than actual low population numbers, as adults spend most of their time in oak canopies rather than at ground level. The subspecies has been documented feeding on non-nectar sources including oak gall exudates and honeydew. Listed as a Species of Special Concern in Massachusetts.
Scaralina
Scaralina is a genus of planthoppers in the family Fulgoridae described in 2024. The genus contains 15 species distributed from Idaho to Panama, with most species occurring at elevations above 1000 meters. Adults are strongly attracted to blacklights and are most diverse in the Madrean Sky Islands bioregion.
Scaralina aethrinsula
Scaralina aethrinsula is a planthopper species in the family Fulgoridae, described in 2024. It was formerly confused with three related species under the misapplied name Alphina glauca. The species occupies montane habitats across the southwestern United States and northern Mexico, where it is associated with oak woodlands.
Scaralina cristata
Scaralina cristata is a planthopper species in the family Fulgoridae, distinguished by its association with oak habitats at higher elevations. It occurs from Arizona south through the Sierra Madre Occidental in Mexico, overlapping in range with congeners S. aethrinsula and S. metcalfi. Adults are readily attracted to blacklights, facilitating detection and study. The species was formally described in 2024, resolving decades of taxonomic confusion under the misapplied name Alphina glauca.
Spectralia
Spectralia is a genus of jewel beetles (family Buprestidae) established by Casey in 1909. The genus contains approximately 22 described species distributed primarily in North America. Species within this genus are associated with woody host plants, particularly oaks (Quercus) and persimmons (Diospyros). Larvae develop in dead or dying branches, often in the transition zone between living and dead wood. Adults are active during spring and early summer and have been documented visiting flowers.
Stenocorus copei
Stenocorus copei is a species of longhorned beetle in the family Cerambycidae, described by Linsley and Chemsak in 1972. It belongs to the subfamily Lepturinae and tribe Rhagiini. The species is considered rare and has been collected in high-elevation coniferous forests of the southwestern United States. Field observations indicate it is attracted to sweet red wine-baited traps hung in Gambel oak (Quercus gambelii) along the margins of alpine coniferous forest.
Sternidius decorus
Sternidius decorus is a species of longhorn beetle in the family Cerambycidae, subfamily Lamiinae. It was originally described as Liopus decorus by Fall in 1907. The species has been documented from Arizona and New Mexico, where it has been collected by beating oak vegetation. It appears to be associated with oak woodland habitats in the southwestern United States.
Stilbosis quadricustatella
Stilbosis quadricustatella is a leaf-mining moth in the family Cosmopterigidae. It creates internal mines in oak leaves and exhibits host-specific variation in population density, with higher densities on sand live oak (Quercus geminata) compared to water oak (Quercus nigra). Its population dynamics are shaped by differential parasitism and predation rates across host species.
Strategus antaeus
ox beetle, smooth ox beetle
Strategus antaeus, commonly known as the ox beetle or smooth ox beetle, is a large rhinoceros beetle in the family Scarabaeidae. It is the second largest beetle in eastern North America. The species occurs in xeric sand prairie remnants and is associated with oak trees, particularly Quercus marilandica (post oak). Live individuals are rarely encountered; carcass remnants are typically found at the base of host trees.
Synolabus
oak leafrolling weevil
Synolabus is a genus of leaf-rolling weevils in the family Attelabidae, established by Jekel in 1860. The genus contains at least two described species: Synolabus bipustulatus and Synolabus nigripes. Members of this genus are known for the characteristic behavior of rolling leaves to create protective structures for their eggs and developing larvae. The common name "oak leafrolling weevil" suggests an association with oak trees for at least one species.
Synolabus bipustulatus
Red-shouldered Leaf Rolling Weevil, Oak Leafrolling Weevil, Red Spotted Leaf-roller
Synolabus bipustulatus is a leaf-rolling weevil in the family Attelabidae, commonly known as the red-shouldered leaf rolling weevil or oak leafrolling weevil. The species is recognized by its distinctive red shoulder markings. As a member of the Attelabidae, it exhibits the characteristic behavior of cutting and rolling leaves to create protective shelters for its eggs and developing larvae. It has been documented primarily in North America.
Telamona maculata
Telamona maculata is a treehopper species in the family Membracidae, first described by Edward Payson Van Duzee in 1908. It is characterized by a high, almost plateau-shaped pronotum with brown and beige patterning and a pale face contrasting with the darker body. The species occurs across eastern North America, feeding on sap from various oak and hickory species. It can be confused with the similar Telamona tristis.
Telamona monticola
Telamona monticola is a treehopper species in the family Membracidae, characterized by an enlarged and often elaborately shaped pronotum typical of the genus. The species is documented from oak trees, where both adults and nymphs feed. Nymphal development has been observed to complete in approximately eight weeks. The species belongs to the tribe Telamonini within the subfamily Smiliinae.
Telamonini
Telamonini is a tribe of treehoppers in the family Membracidae, comprising approximately 9 genera and at least 50 described species. The tribe was reinstated from synonymy with Smiliini based on morphological phylogenetic analysis. Members are predominantly Nearctic in distribution, with strong evolutionary associations with oak (Quercus) as host plants. Nymphs represent the predominant feeding stage and are critical for accurate host plant determination, as adult movements often produce unreliable records.
Tigrinestola tigrina
Tigrinestola tigrina is a species of longhorn beetle (Cerambycidae: Lamiinae) originally described by Skinner in 1905. The species has been collected from oak habitats in southeastern Arizona, specifically from dead branches of Quercus hypoleucoides (silverleaf oak). It is attracted to ultraviolet and mercury-vapor lights at night. The species occurs in the southwestern United States and Mexico, including Baja California.
Tragidion coquus
Tragidion coquus is a species of longhorn beetle in the family Cerambycidae, originally described by Linnaeus in 1758. It is among the larger and more visually striking cerambycids in North America, with velvety black and vivid orange coloration that mimics tarantula hawk wasps (Pompilidae). The species occurs broadly across the eastern and central United States, where it breeds in dead hardwoods, particularly oak. It is considered rare and difficult to encounter in the field despite its wide distribution.
Tropidosteptes quercicola
Oak Catkin Mirid
Tropidosteptes quercicola is a species of plant bug in the family Miridae, commonly known as the oak catkin mirid. It is native to North America and is associated with oak trees. The species was first described by Johnston in 1939. It is one of the more frequently observed mirid species in its range, with over 3,000 documented observations.
Tylosis puncticollis
Tylosis puncticollis is a species of longhorned beetle (family Cerambycidae) described by Henry Walter Bates in 1885. It belongs to the tribe Trachyderini, a group of robust, often colorful cerambycids commonly known as trachyderines. The genus Tylosis is restricted to the Americas, with species distributed from the southwestern United States through Mexico. Like other members of its genus, T. puncticollis likely exhibits the characteristic elongated body form and long antennae typical of cerambycids, though specific morphological details distinguishing it from congeners require close examination.
Xanthonia angulata
Xanthonia angulata is a small leaf beetle in the family Chrysomelidae, measuring 3.5–4 mm in length with uniformly medium brown elytra. The species was described by Staines and Weisman in 2001. Its specific epithet derives from the Latin angulatus, meaning 'with angles'. The beetle occurs in eastern and central North America and has been documented in association with oak trees (Quercus spp.).
Xanthonia dentata
Xanthonia dentata is a small leaf beetle in the family Chrysomelidae, described by Staines and Weisman in 2002. The species is known from the southwestern United States, where it has been collected in association with oak trees. Adults measure 2.8–3.4 mm in length and display distinctive coloration useful for identification.
Xanthonia furcata
Xanthonia furcata is a small leaf beetle in the family Chrysomelidae, described by Staines & Weisman in 2001. The species is found in the southern and eastern United States, with documented records from Illinois, Missouri, Texas, and Oklahoma. It is associated with wild cherry (Prunus spp.) and oaks (Quercus spp.) as host plants. The specific epithet 'furcata' derives from Latin 'furca,' meaning 'fork,' though the morphological feature this refers to is not explicitly described in available sources.
Xanthonia parva
Lacey Oak Xanthonia
Xanthonia parva is a species of leaf beetle in the family Chrysomelidae, described in 2019 from material collected in Texas. It is one of the smallest species in the genus Xanthonia and is associated with Quercus laceyi (Lacey oak). The species was distinguished from congeners based on morphological characters and represents part of ongoing taxonomic revision of North American Eumolpinae.