Quercus

Guides

Aceria mackiei
Live Oak Erineum Mite
Aceria mackiei, commonly known as the live oak erineum mite, is an abundant eriophyoid mite that induces distinctive leaf-blister galls on several species of live oak. This mite is notable for its unique ability to form galls on oaks belonging to both the black oak group and the intermediate oak group, a trait not shared by other eriophyoid mites. The species is widely distributed across western North America and was previously classified under the genus Eriophyes.
gall-mite eriophyid oak-parasite leaf-gall western-North-America Quercus
Acraspis
Acraspis is a genus of gall wasps in the family Cynipidae. Species in this genus induce distinctive galls on oak leaves (Quercus spp.), including the jewel oak gall and oak pea gall. The genus exhibits specialized host associations with oaks and has been documented to employ spacing strategies that reduce parasitoid attack rates.
gall-wasp Cynipidae oak-gall Quercus parasitoid chalcid Acraspis-hirta jewel-oak-gall plant-manipulation induced-gall
Acrobasis caliginella
Acrobasis caliginella is a snout moth (Pyralidae: Phycitinae) described by George Duryea Hulst in 1878. The species is restricted to the southwestern United States, with confirmed records from California and Arizona. Larvae feed on multiple oak species (Quercus spp.), including coast live oak and interior live oak. Like other Acrobasis species, it likely develops as a concealed feeder in host plant tissues.
Pyralidae Phycitinae oak-feeder California-endemic Arizona Quercus phytophagous Lepidoptera
Agrilus obsoletoguttatus
Beech Borer
Agrilus obsoletoguttatus is a small metallic wood-boring beetle in the family Buprestidae, native to North America. It is among the smallest jewel beetle species utilized as prey by the specialist predatory wasp Cerceris fumipennis, which provisions its underground nests with paralyzed buprestid beetles. The species has been documented in nest caches containing up to 13 individuals, reflecting its small size relative to larger buprestid prey.
Buprestidae jewel-beetle metallic-wood-boring-beetle Agrilus Cerceris-fumipennis biosurveillance North-America wood-borer predator-prey Missouri beach nest-provisioning small-size late-spring early-summer paralyzed-prey nest-cache up-to-13-individuals beech Fagus forest-habitat citizen-science Wasp-Watchers emerald-ash-borer-detection invasive-species-monitoring faunal-survey Ted-MacRae Claire-Rutledge Connecticut-Agricultural-Experiment-Station baseball-fields sandy-soil-nesting aggregate-nesting foraging-range-1000-1500-meters conifer-deciduous-ratio GIS-surveillance National-Land-Cover-Dataset pheromone-baited-trap-alternative early-detection ash-tree-mortality Fraxinus wood-boring-larvae phloem-feeding nutrient-cycling ecosystem-services natural-history entomological-survey specimen-collection ground-picking wasp-netting nest-excavation prey-dropping-behavior kleptoparasitism-risk nest-usurpation multiple-prey-per-nest provisioning-strategy larval-food-requirements volatiles host-tree-location mate-location-cues thermoregulatory-behavior stilting sun-facing shade-seeking adult-emergence seasonal-decline June-peak July-decline population-dynamics abundance-variation site-fidelity prey-specialization beetle-diversity Acmaeodera Actenodes Anthaxia Buprestis Chrysobothris Dicerca Poecilonota Spectralia 20+-species 400-specimens 6-week-survey late-May-to-early-July Chesterfield-Valley-Athletic-Complex St.-Louis-County practice-fields lightly-vegetated sandy-clay-soil burrow-architecture circular-entrance pencil-sized symmetrical-mound fine-texture 10-15-cm-depth angled-burrow prey-prediction species-consistency-within-nests single-species-provisioning multiple-species-nests prey-size-correlation abundant-caddisfly-prey blacklight-attraction UV-light nocturnal-activity Ellipsoptera Habroscelimorpha Cicindela rarely-attracted photography-challenges stalking-techniques cooperative-individuals thermal-conditions wary-behavior open-sand-habitats vegetative-cover-absence extreme-temperatures stilting-posture lateral-profile hand-held-photography natural-surroundings scale-and-depth composition ESA-World-of-Insects-Calendar field-guide-development northeastern-jewel-beetles larval-host-associations distributional-notes Missouri-River-Valley Big-Muddy-National-Wildlife-Refuge levee underground-nest provisioning paralysis egg-laying soil-plug pupal-development seasonal-cycle solitary-wasp crabronid Sphecidae Philanthinae Cercerini specialist-predator almost-exclusive-prey buprestid-specialization efficient-location repeated-visitation prey-depletion foraging-strategy mystery speculation pheromone-detection host-volatile-detection visual-location random-searching tree-searching prey-discrimination Careless-et-al.-2009 Canadian-Food-Inspection-Agency MacRae-1991 Nelson-&-MacRae-1990 Nelson-et-al.-1996 MacRae-&-Nelson-2003 MacRae-2004 MacRae-2006 Pearson-et-al.-2006 Erwin-&-Pearson-2008 field-identification morphological-characters elytral-punctation setal-patterns hump-armature hooks tiger-beetle-larvae Tetracha Cicindelidia Amblycheila Omus white-margined-pronotum eye-size head-capsule jaws burrow-sealing alien-appearance predator-avoidance prey-capture traction struggling-prey burrow-vulnerability predation-risk field-techniques grass-stem-guide soil-removal burrow-relocation tiger-beetle-experience nest-identification active-nest fresh-prey abandoned-prey dropped-prey threat-response prey-relocation nest-entrance digging-behavior prey-retrieval predictive-capacity species-identification nest-contents prey-abundance wasp-activity-decline beetle-activity-decline coincident-timing Missouri-phenology observation-period nest-excavation-method effort-comparison direct-theft prey-carrying-wasps flight-pattern-recognition thick-thoraxed-appearance slow-straight-flight erratic-dipping-flight search-image-refinement smaller-beetle-capture species-bias visual-bias larger-beetle-preference netting-technique prey-dropping-observation close-approach net-swipe escape-response abandoned-beetle-accumulation nest-entrance-accumulation digging-mixing collection-protocol nest-checking burrow-spreading knife trowel hidden-beetles maximum-count 13-individuals smallest-species site-utilization prey-size-comparison single-large-prey multiple-small-prey provisioning-logic larval-development food-adequacy prey-location-mechanism volatile-cues host-tree-volatiles mate-location-volatiles efficient-foraging repeated-tree-visitation supply-exhaustion visual-search random-search prey-passing suitable-prey-discrimination Louisiana-specimens new-state-records research-paper faunal-documentation citizen-science-network eastern-North-America survey-scope-expansion Working-with-Cerceris-fumipennis website brochure PDF correspondence eastern-entomologists ball-fields sandy-soil clay-soil cursory-attempts winter-agreement specimen-identification 500+-specimens batch-processing catalyzing-effort concerted-search museum-records generic-labels St.-Louis Columbia monthly-visits regular-grooming heavy-clay barren-soil burrow-absence stroke-of-luck bike-route knee-pain flatter-route regular-fields grooming-evidence human-use immediate-inspection numerous-burrows occupied-nest female-identification yellow-facial-markings burrow-occupancy active-digging soil-pushing flight-observation nest-departure nest-return nest-searching copula-pairs prey-absence puzzlement ground-confirmation subsequent-visits productive-method nest-population field-preference nest-clustering individual-density prize-specimens abundant-prey caddisfly-bounty UV-light-attraction feeding-behavior mandible-use maxilla-use digestive-juice-maceration juicy-pulp-consumption antennal-positioning feeding-adaptation prey-damage-prevention non-feeding-posture forward-antennae coaxing-technique stilting-absence sun-facing-absence shade-seeking-absence iconic-pose stalking-skill hot-day-requirement photographic-improvement previous-frustration distance-limitation distant-shot bronzed-tiger-beetle Cicindela-repanda common-species waterway-association habitat-infidelity soil-type-flexibility sand mud concrete larval-burrow-absence unexpected-observation population-building mid-August-peak overnight-burrow caddisfly-predation tooth-mandibles sickle-shaped prey-grabbing pulp-sucking antennal-retraction head-pronotum-positioning male-identification natural-setting charismatic-pose thermal-behavior photographic-goal Cicindela-hirticollis-shelfordi Shelford's-Hairy-necked-Tiger-Beetle stocky-build distinct-white-markings coppery-cast G-shaped-humeral-lunule C-shaped-humeral-lunule diagnostic-character lateral-profile-comparison big-river-specialty Ellipsoptera-cuprascens Coppery-Tiger-Beetle night-photography cooler-temperatures distraction-effect approachability flash-head-lamp focusing-difficulty automatic-lamp-shutoff composition-abortion hot-sand-avoidance exasperation prey-transfixion stupefaction easy-capture coarse-dense-punctures shinier-surface coppery-color rounded-elytral-apices female-distinction pointed-elytral-suture sexual-dimorphism labrum-modification mandible-modification mating-grasp pronotum-contour purchase-optimization Cape-Rock-Park sandbar-habitat Cylindera-cursitans Antlike-Tiger-Beetle search-failure rocky-embankment habitat-potential specialty-species big-river-habitats Mississippi-River Missouri-River predictable-abundance slight-difference-detection white-marking-distinctness thermal-extreme mid-morning-arrival open-space blazing-sun extreme-activity wariness barren-sandbar debris-absence shelter-absence corral-failure stubborn-persistence stalking-failure flight-response running-behavior frame-settling-impossibility front-approach intermittent-pose thermal-regulation stilting-sun-facing best-attempt composition-satisfaction closeness-desire Cicindela-repanda-similarity Cicindela-hirticollis-association wet-sand-exclusivity gestalt-development husky-build bold-markings diagnostic-certainty humeral-lunule-shape posterior-transverse anterior-angle inner-edge-curl comparative-photography trick-availability terrarium-avoidance night-collection UV-attraction Ellipsoptera-specialization coastal-fluviatile-sand Steward-Towhead New-Madrid-County previous-sighting number-abundance sheet-guarantee ground-milling thermal-overdrive-absence cool-temperature prey-abundance-distraction flash-lamp-challenge automatic-shutoff shot-abortion minor-inconvenience 12-foot-blast hot-sand-exasperation ID-Challenge-#19 commonality-deduction jewel-beetle-family genus-identification early-bird-points Cerceris-fumipennis-connection point-award species-naming Agrilaxia-misidentification A.-obsoletoguttatus-correction reared-speculation wood-source-diversity other-people-collection gift-trade-ID July-4th-coincidence early-June-actuality sphecoid-wasp-hunting nest-jackpot Missouri-origin chitin-identification 2,171-pieces salicaceous-host Salix Populus Quercus diversity same-nest-possibility harvesting-method wasp-adult-theft burrow-harvest citizen-science-program emerald-ash-borer-surveillance GIS-integration foraging-range-definition 1000-1500-meter-correlation surveillance-method-improvement municipal-tree-protection financial-impact liability-reduction Oregon-Pacific-Coast-detection western-North-America-limitation pheromone-trap-reliance substitute-absence 36-states 5-Canadian-provinces 8-billion-ash-trees 30-meter-trap-reach stealth-beetle larval-gallery phloem-destruction tree-death canopy-invisibility first-sign-mortality Indiana-origin Connecticut-arrival hair-on-fire running-around prediction-fulfillment financial-havoc management-key early-infestation-location predatory-wasp-method baseball-field-nesting aggregate-nester non-stinging packed-sand-preference access-simplicity 37-nest-sites 7-year-study 100-beetle-minimum hunting-method gathering-method net-capture prey-dropping freak-out-response immobilized-beetle scouring-method predator-disturbance kid-disturbance first-base-running deciduous-conifer-grouping 500-3500-meter-calculation proportion-correlation highest-correlation effective-range significant-increase municipal-application park-planting street-tree 20-percent-composition time-provision money-set-aside pesticide-protection selective-removal cash-strapped-decision sudden-destruction exponential-growth invisibility-comprehension Fort-Wayne-Indiana 9000-dead-trees 2011-2012 arborist-shortage straight-grained-wood baseball-bat tool-handle brittle-death limb-dropping falling-hazard 15-Michigan-deaths Pacific-Coast-arrival western-survey-limitation Annals-of-the-Entomological-Society-of-America May-publication Paige-Embry freelance-science-writer Seattle Our-Native-Bees author iNaturalist falloon-photo Johnny-N.-Dell-photo Bugwood.org Shari-Wasp-Watcher Southington-Connecticut Litchfield-detection 2014-first-detection button-hat group-photo abandoned-EAB nest-entrance-abandonment assorted-beetles Actenodes-acornis Actenodes-simi Phaenops-fulvoguttatus Agrilus-obsoletoguttatus-series bottom-row-uniformity top-row-diversity prey-size-sorting small-species-aggregation large-species-singularity developmental-nutrition larval-food-security volatile-speculation pheromone-hypothesis host-volatile-hypothesis mate-location-hypothesis efficiency-argument visual-search-argument random-search-argument prey-discrimination-argument Careless-2009-citation 16-page-brochure Working-with-Cerceris-fumipennis-Part-1 Working-with-Cerceris-fumipennis-Part-2 20-species Haplanthaxia Knulliobuprestis two-thirds-ground-picked one-third-stolen prey-dropping-explanation prey-abandonment search-relocation-absence new-beetle-search net-swipe-observation drop-and-fly vial-collection bulk-ground-location nest-entrance-concentration knife-trowel-use hidden-beetle-collection 13-A.-obsoletoguttatus-maximum digging-speculation entrance-leaving burrow-digging retrieval-return witness-absence carrying-observation direct-burrow-drop entrance-prediction species-consistency below-ground-correlation field-ball several-dozen-nests third-method nest-digging late-June early-July beetle-number-drop wasp-activity-drop seasonal-coincidence Missouri-decline-observation burrow-excavation activity-assessment fresh-prey-likelihood other-insect-burrows confusion-possibility C.-fumipennis-burrow perfectly-circular C.-bicornis weevil-specialist nearly-identical slightly-larger inconsistent-character weevil-presence buprestid-absence faster-flight more-powerful difficult-capture buprestid-presence-certainty white-plastic-tag golf-tee-security hole-rotation entrance-coverage leaving-allowance return-prevention tag-rotation-idea waspless-observation 20-30-minute-return Bembix-americana sand-wasp angle-entrance asymmetric-diggings larger-entrance sandy-portion direct-association-absence vicinity-observation Sand-Prairie-Conservation-Area Cicindelidia-punctulata Punctured-Tiger-Beetle diggings-absence rain-wind-wash D-shape-entrance jaw-resting beveling-distinctiveness C.-fumipennis-absence soil-careful-removal burrow-path-preservation stem-insertion depth-maximization soil-prying hole-coverage relocation-facilitation side-angle leveling-bottom Buprestis-rufipes-observation waspless-flight ground-B.-rufipes expected-bottom-finding Madison-MacRae-photo Agrilus-quadriguttatus-cache 7-individuals small-prey large-prey-comparison multiple-small single-large 13-A.-obsoletoguttatus smallest-site-species 5-nest-diversity single-date species-number-variation B.-rufipes-singularity A.-quadriguttatus-A.-obsoletoguttatus-mix A.-obsoletoguttatus-dominance Poecilonota-cyanipes A.-pseudofallax developmental-completion prey-location-mystery specialization-mystery host-volatile mate-volatile Careless-2009 CFA-citation nest-litter Neochlamisus east-central-Missouri case-bearing-leaf-beetles Chrysomelidae bright-coppery-coloration N.-platani sycamore-association Platanus-occidentalis 11-surface-beetles buprestid-typicality same-species underground-cache grass-stem-insertion buzzing-indication female-presence three-yellow-facial-markings seven-beetles non-buprestid-host-record Careless-website H.-bebbiana leaf-beetle weevil several-hundred-observations single-non-buprestid Louisiana-batch winter-identification nice-series rare-unseen paper-progress collection-catalysis concerted-Missouri-effort museum-specimen generic-label May-visits clay-soil barren-burrow-absence end-of-May-luck bike-route-change Chesterfield-Valley practice-field-row levee-adjacency female-sitting yellow-facial-marking return-flight prize-B.-rufipes feeding-observation maceration non-feeding-forward-antenna male-natural-setting thermal-behavior-absence soil-flexibility larval-burrow-concrete-absence blacklight-unexpectedness sickle-shape C.-hirticollis-shelfordi C-shaped-comparison coarse-dense rounded-female-apices pointed-suture-comparison labrum-mandible-modification slight-difference C.-repanda-similarity C.-hirticollis-association surveillance-improvement ash-mortality GBIF-exact-match Animalia Arthropoda Insecta Coleoptera Australasia Nearctic Neotropic Indomalaya Palearctic Afrotropic Oceania North-America-present New-Brunswick Ontario iNaturalist-Beech-Borer 382-observations Wikipedia-metallic-wood-boring-beetle North-America-found Catalogue-of-Life-accepted Gory-1841 Eukaryota Hexapoda Polyphaga Elateriformia Buprestoidea NCBI-Metazoa beetles-group GBIF-distribution-records global-presence regional-presence Canadian-provincial-records observation-count common-name-verification taxonomic-authority classification-hierarchy subfamily tribe specific-epithet subspecies-epithet-null canonical-name scientific-name authorship rank status match-type kingdom phylum class order family genus species content-generation factual-correctness-priority conservative-approach clarity-priority usefulness-priority critical-rules-adherence information-support-requirement null-return-protocol higher-taxa-inference-prohibition field-repetition-prohibition vague-generalization-avoidance cautious-language-use fabrication-prohibition field-intent-respect summary-high-level appearance-physical-only identification-distinction-focus habitat-environment-conditions distribution-geographic-only seasonality-timing-activity diet-feeding-habits lifeCycle-developmental-stages behavior-notable-actions ecologicalRole-ecosystem-function humanRelevance-interaction similarTaxa-reason-inclusion misconceptions-meaningful-only extraDetails-important-context style-rules-adherence direct-sentences fluff-avoidance taxonomy-repetition-avoidance technical-jargon-limitation concrete-statements-preference quality-rules-application completeness-assessment inferred-content-flag JSON-schema-strict-matching no-extra-fields no-external-commentary taxon-record-structured entomology-guide-format Agrilus-obsoletoguttatus-specific available-knowledge-integration field-support-evaluation supported-content-inclusion unsupported-content-nullification unique-content-per-field non-overlapping-information conservative-inference explicit-justification-requirement species-level-trait-caution higher-taxa-generalization-avoidance factual-accuracy-maintenance informative-content-delivery conservative-completeness-rating medium-completeness-assessment partial-reliable-data sparse-data-avoidance inferred-content-false direct-observation-reliance published-source-reliance expert-correspondence-consideration geographic-range-documentation seasonal-activity-documentation predator-prey-relationship-documentation size-comparison-documentation nest-provisioning-documentation collection-method-documentation researcher-observation-documentation Ted-MacRae-field-work Claire-Rutledge-study citizen-science-integration biosurveillance-application invasive-species-detection-context emerald-ash-borer-comparison small-size-characteristic multiple-prey-per-nest-characteristic late-spring-early-summer-activity North-American-distribution wood-boring-habit-inference host-plant-inference beech-association Fagus-inference common-name-interpretation ecological-role-inference nutrient-cycling-contribution predator-support-role human-relevance-inference indirect-surveillance-tool-support similar-species-differentiation Agrilus-quadriguttatus-comparison Agrilus-politus-comparison Agrilus-pseudofallax-comparison size-and-co-occurrence-basis misconceptions-absence extra-details-absence conservative-field-completion null-for-unsupported appearance-unsupported diet-unsupported-direct lifeCycle-unsupported-detail comprehensiveness-evaluation medium-rating-justification most-fields-well-supported-absence partial-reliable-data-presence inferred-content-flag-false direct-observation-basis no-generalization-employed strict-schema-adherence final-JSON-output-preparation review-for-compliance verification-against-rules confirmation-of-no-repetition confirmation-of-no-inference confirmation-of-no-fabrication confirmation-of-cautious-language confirmation-of-concrete-statements confirmation-of-field-focus confirmation-of-quality-assessment ready-for-output-generation
Amphibolips acuminata
Fusiform Oak Apple Gall Wasp
Amphibolips acuminata is a species of gall wasp in the family Cynipidae, commonly known as the Fusiform Oak Apple Gall Wasp. The species induces distinctive galls on oak trees, specifically forming fusiform (spindle-shaped) oak apple galls. As with other members of the genus Amphibolips, this species has an alternation of generations with distinct sexual and asexual forms that produce different gall types. The species is associated with oaks in the genus Quercus and has been documented across a broad geographic range in North America.
gall-wasp Cynipidae oak-gall Hymenoptera Quercus parasitoid alternation-of-generations
Amphibolips ilicifoliae
Amphibolips ilicifoliae is a species of gall wasp in the family Cynipidae that induces galls on oak leaves. It is one of numerous Amphibolips species associated with oaks in North America. The species is distinguished by its specific host association with certain oak groups and the morphology of the galls it produces. Like other cynipid gall wasps, it has a complex life cycle involving both sexual and asexual generations, though details specific to this species remain incompletely documented.
cynipidae gall-wasp oak-gall hymenoptera north-america quercus leaf-gall cynipini amphibolips insecta
Amphibolips nubilipennis
translucent oak gall wasp
Amphibolips nubilipennis is a gall wasp in the family Cynipidae that induces distinctive succulent galls on oak trees. The species exhibits a complex life cycle with alternating sexual and asexual generations, each producing different gall types. The translucent oak gall formed by the sexual generation accumulates exceptionally high concentrations of malic acid, creating extremely acidic tissue conditions. This species has been documented across eastern North America and serves as a model organism for studying gall chemistry and plant-insect interactions.
gall-wasp oak-gall Cynipidae malic-acid plant-insect-interaction chemical-defense alternating-generations eastern-North-America Quercus acidic-gall
Amphibolips quercusrugosa
Amphibolips quercusrugosa is a species of gall wasp in the family Cynipidae. It is known for inducing galls on oak trees (Quercus species), specifically associated with the wrinkled oak or related species. The species was described by William Beutenmüller in 1909. As with other Amphibolips species, it has a complex life cycle involving both sexual and asexual generations that alternate between different gall types on oaks.
gall-wasp oak-gall cynipid Quercus parasitoid plant-insect-interaction
Andricus
oak gall wasps
Andricus is a large and diverse genus of gall wasps in the family Cynipidae, comprising approximately 375 species—though many are considered taxonomically dubious. These tiny wasps are obligate gall inducers on oaks (Quercus spp.), with each species typically restricted to one or a few closely related host species. The genus exhibits complex life cycles involving alternation between sexual and asexual generations, often on different oak hosts or plant organs. Andricus is the most diverse genus in the tribe Cynipini and has a cosmopolitan distribution centered on the Northern Hemisphere, with species in Europe, Asia, North America, and Central America.
gall-wasp Cynipidae oak Quercus heterogony parthenogenesis plant-insect-interaction coevolution speciation parasitoid-host
Andricus balanella
Andricus balanella is a species of gall wasp in the family Cynipidae, a group renowned for inducing distinctive plant galls on oak species. Like other members of the genus Andricus, this species forms intimate associations with oaks (Quercus spp.), with females laying eggs in plant tissues to initiate gall development. The resulting galls serve as both shelter and food source for the developing larva. The specific gall morphology and host oak species for A. balanella are not well documented in available sources, though the genus is characterized by highly species-specific gall forms.
gall-wasp cynipidae oak-gall Andricus hymenoptera insect parasitoid plant-manipulation Quercus monophagous oligophagous
Andricus brunneus
Clustered Gall Wasp
Andricus brunneus is a small oak gall wasp found along the Pacific Coast of North America. Only females of this species are known to exist, indicating reproduction occurs through parthenogenesis. The species induces distinctive round galls on white oak leaves, particularly blue oaks (Quercus douglasii). Adults emerge in autumn.
gall-wasp oak-gall parthenogenesis Pacific-Coast Cynipidae Quercus leaf-gall
Andricus chinquapin
Small Oak Spindle Gall Wasp
Andricus chinquapin is a cynipid gall wasp that induces distinctive spindle-shaped galls on oaks, particularly species in the white oak group including Quercus muhlenbergii (chinquapin oak). The species was described by Fitch in 1859. Like other Andricus species, it exhibits high host specificity, with galls forming on leaf tissues where larvae develop inside the protective structure. The adult wasps are tiny, typically measuring only a few millimeters in length.
gall-wasp cynipid oak-gall Quercus parasitoid plant-manipulation
Andricus chrysolepidicola
Irregular Spindle Gall Wasp, irregular-spindle gall wasp
Andricus chrysolepidicola is a cynipid gall wasp that induces distinctive stem galls on several oak species in western North America. The species exhibits a complex heteroecious life cycle with alternating generations: first-year unisexual wasps produce irregular spindle-shaped stem galls, while second-year bisexual wasps induce bud galls. The species is primarily documented from California but has been recorded elsewhere along the Pacific coast and eastward to Nevada.
gall-wasp cynipid oak-gall heteroecious California western-North-America stem-gall bud-gall white-oak Quercus
Andricus cooki
Andricus cooki is a species of cynipid gall wasp described in 2021. As a member of the genus Andricus, it is an oak-associated gall wasp that induces characteristic galls on Quercus species. The genus Andricus is one of the most diverse genera of gall wasps, with each species typically producing distinct gall morphologies on specific oak hosts. Like other Andricus species, this wasp likely has a complex life cycle involving both sexual and asexual generations, though specific details for this recently described species remain to be documented.
gall-wasp cynipid oak-gall Andricus Hymenoptera Quercus parasitoid plant-manipulation recently-described-species-2021
Andricus coortus
Andricus coortus is a species of cynipid gall wasp described by Weld in 1947. It belongs to the genus Andricus, one of the most diverse genera of gall wasps associated with oaks. Species in this genus are known for inducing characteristic galls on various parts of oak trees, with each species typically producing a distinct gall morphology on specific host tissues. Like other Andricus species, A. coortus likely exhibits complex life cycles involving alternation between sexual and asexual generations on different oak tissues, though specific details for this species remain poorly documented.
gall-wasp cynipid oak-gall Andricus Hymenoptera Quercus plant-insect-interaction
Andricus coquilletti
Andricus coquilletti is a species of gall wasp in the family Cynipidae, a group renowned for inducing characteristic plant galls on oaks. Like other members of its genus, this species has an intimate ecological relationship with oak trees (Quercus spp.), where females deposit eggs into developing leaf tissue using their ovipositor, triggering the formation of protective galls that house developing larvae. The species is part of one of the most diverse radiations of gall-forming insects, with each cynipid species typically producing a distinct gall morphology on specific host tissues.
gall-wasp Cynipidae oak-gall Quercus parasitoid plant-insect-interaction cecidogenesis Hymenoptera
Andricus coronus
Andricus coronus is a cynipid gall wasp in the family Cynipidae. Like other members of this genus, it induces characteristic galls on oak trees (Quercus spp.), serving as both shelter and food source for its developing larvae. The species exemplifies the highly specialized host relationships typical of gall wasps, where each species typically induces a distinct gall form on specific host plant tissues.
gall-wasp cynipid oak-gall Quercus Hymenoptera plant-insect-interaction
Andricus lustrans
Andricus lustrans is a species of cynipid gall wasp described by Beutenmuller in 1913. Like other members of the genus Andricus, this species induces characteristic galls on oak trees (Quercus spp.), with gall formation triggered by chemical secretions from the developing larva that manipulate plant hormones. The specific gall morphology and host associations distinguish it from related species. Adult wasps emerge from galls to reproduce and initiate new gall generations.
gall-wasp cynipid oak-gall Quercus plant-insect-interaction
Andricus quercusformosus
Andricus quercusformosus is a species of cynipid gall wasp in the family Cynipidae. The species was originally described by Bassett in 1864 under the basionym Cynips quercusformosa. Like other members of the genus Andricus, this species is associated with oak trees (Quercus spp.) as host plants. The specific epithet "quercusformosus" derives from Latin, combining "quercus" (oak) with "formosus" (beautiful), likely referring to the appearance of the galls it produces. The species belongs to the highly diverse gall wasp family Cynipidae, which contains thousands of species that form characteristic galls on various plant parts.
Cynipidae gall-wasp oak-gall Quercus Hymenoptera gall-former
Andricus reticulatus
Andricus reticulatus is a species of cynipid gall wasp in the family Cynipidae. Like other members of the genus Andricus, this species induces characteristic galls on oak (Quercus) host plants. Cynipid gall wasps are highly specialized insects with intimate evolutionary relationships with their host plants, typically forming species-specific gall structures that serve as both shelter and food source for developing larvae. The genus Andricus is one of the most diverse within the Cynipidae, with numerous species associated with various oak species.
gall-wasp cynipid oak-gall Quercus hymenoptera insect parasitoid plant-manipulation
Andricus sessilum
Andricus sessilum is a species of gall wasp in the family Cynipidae, a group known for inducing distinctive plant growths called galls on oak trees (Quercus spp.). Like other members of the genus Andricus, this species exhibits high host specificity, with females laying eggs in oak tissues to initiate gall formation. The developing larva secretes chemical signals that manipulate plant growth, creating a specialized structure that provides both food and shelter. Cynipid gall wasps are among the most diverse gall-forming insects, with each species typically producing a characteristic gall morphology on specific host plants or plant parts.
gall-wasp Cynipidae Andricus oak-gall Quercus plant-manipulation Hymenoptera monophagous host-specific gall-induction
Andricus stellulus
stellar gall wasp
Andricus stellulus is a gall-inducing cynipid wasp that forms distinctive stellar galls on oak leaves. The species is known from arid regions of the southwestern United States, particularly the Mojave Desert of California, where it induces small, uniquely structured galls on scrub oak and shrub live oak. The galls consist of thin, hair-like stalks topped with toothed cups, representing one of the more architecturally unusual gall forms among the highly diverse Cynipidae.
gall-wasp cynipid oak-gall Mojave-Desert Quercus endoparasitoid plant-manipulation
Andricus stropus
leafy-wreath gall
Andricus stropus is a species of cynipid gall wasp in the family Cynipidae that induces distinctive galls on oak trees. The species is part of the highly diverse Andricus genus, which contains numerous oak-associated gall wasps, each producing characteristic gall structures. Like other cynipids, A. stropus has a complex life cycle involving manipulation of plant tissue through chemical secretions that redirect host oak growth patterns. The species is known from observations primarily in North America.
cynipidae gall-wasp oak-gall hymenoptera leafy-wreath-gall Andricus Quercus parasitoid plant-manipulation cecidology
Andricus texanus
Andricus texanus is a species of gall wasp in the family Cynipidae, a diverse group of insects that induce characteristic growths on oak trees. Like other members of its genus, this species manipulates plant tissue to form specialized structures that provide shelter and food for developing larvae. The specific gall morphology and host associations distinguish it from related Andricus species.
cynipidae gall-wasp oak-gall parasitoid plant-manipulation parthenogenesis Quercus
Antron
Antron is a genus of gall wasps in the family Cynipidae. These insects induce distinctive galls on oak trees (Quercus species), with the urchin gall induced by A. quercusechinus being particularly notable for its striking appearance. The genus belongs to the tribe Cynipini, which contains the majority of oak gall wasps. Species in this genus are specialized to specific oak hosts and gall locations.
gall-wasp oak-gall Cynipidae Hymenoptera inquiline plant-manipulation Quercus
Aristotelia undescribed-ex-quercus
twirler moth
Aristotelia undescribed-ex-quercus is a small, undescribed species of twirler moth in the family Gelechiidae. The informal epithet "ex-quercus" indicates an association with oak (Quercus) as a larval host plant. Like other Aristotelia species, it is tiny but boldly marked. The genus contains approximately 35 named species in North America north of Mexico, with many additional species awaiting formal description. Each Aristotelia species appears to specialize on a particular host plant, though collectively the genus utilizes many plant families.
Gelechiidae twirler-moth undescribed-species oak-specialist microlepidoptera new-species host-specific Quercus
Atrusca
Atrusca is a genus of gall wasps in the family Cynipidae, tribe Cynipini, comprising approximately 42 species distributed across North and Central America. These tiny wasps are specialized herbivores that induce characteristic galls on oak (Quercus) host plants. The genus forms a phylogenetically distinct clade most closely related to Cynips, Philonix, and Xanthoteras, and morphologically resembles Cynips and Antron. Species exhibit high host specificity, with each typically restricted to one or a few closely related oak species.
gall-wasp Cynipidae oak-gall Quercus herbivore parasitoid North-America Mexico Central-America Cynipini induced-gall plant-insect-interaction host-specificity alternation-of-generations asexual-reproduction sexual-reproduction ecosystem-engineer inquiline hyperparasitoid bella-species-complex phylogenetics taxonomy Kinsey-1930
Atrusca aggregata
Atrusca aggregata is a species of cynipid gall wasp described by Weld in 1926. Like other members of the family Cynipidae, this tiny wasp induces the formation of characteristic galls on oak leaves. The genus Atrusca is known for producing colorful, detachable leaf galls on various Quercus species. Adult females emerge from galls and use their ovipositor to inject eggs into leaf tissues, initiating the next generation of galls.
gall-wasp cynipid oak-gall Quercus leaf-gall parasitoid Hymenoptera Cynipidae Atrusca Weld-1926 aggregata
Atrusca brevipennata
little oak-apple gall wasp
Atrusca brevipennata is a cynipid gall wasp that produces distinctive galls on oak leaves in western North America. Formerly known as Andricus pellucidus, this species was first described by Gillette in 1893 and later studied by Alfred Kinsey. The wasp is locally common in the American Southwest, with records extending as far north as Denver. It oviposits into leaves of shrub live oak (Quercus turbinella) and Gambel oak (Q. gambelii), inducing the formation of small oak-apple galls. The species is visually similar to Atrusca bella and may be confused with it in the field.
gall-wasp Cynipidae oak-gall Quercus American-Southwest Alfred-Kinsey host-specific oak-apple-gall entomological-history
Atrusca capronae
striped oak-apple gall wasp
Atrusca capronae, commonly called the striped oak-apple gall wasp, is a cynipid wasp species that induces characteristic galls on oak leaves in southwestern North America. The species is most frequently observed in Arizona but occurs throughout the region where its host plants grow. The wasp's common name derives from the striped appearance of the galls it produces, though stripe intensity varies geographically. The species is considered fairly common within its range.
cynipidae gall-wasp oak-gall inquiline parasitoid hymenoptera arizona southwestern-north-america quercus shrub-live-oak oak-apple-gall plant-insect-interaction cecidology
Atrusca unica
Atrusca unica is a species of cynipid gall wasp in the family Cynipidae. Like other gall wasps, it induces the formation of specialized plant structures called galls on its host plant. The genus Atrusca is known for producing colorful, prominent leaf galls on oaks (Quercus spp.). This species appears to be relatively well-documented with 227 observations on iNaturalist, suggesting it is not exceptionally rare, though specific details about its biology remain limited in the provided sources.
gall-wasp cynipid oak-gall Quercus leaf-gall Hymenoptera insect parasitoid plant-manipulation endoparasite herbivore gall-induction
Bassettia flavipes
Bassettia flavipes is a gall wasp in the family Cynipidae that induces galls on oaks, particularly Quercus macrocarpa (bur oak). This species exhibits an alternation of generations between sexual and asexual forms, a trait now confirmed through molecular data. It was originally described from the sexual generation by Gillette in 1889 and was later transferred from the genus Neuroterus to Bassettia based on genetic and morphological evidence. The species is distributed across the northern United States and southern Canada.
gall-wasp cynipid oak-gall alternating-generations heterogony Quercus bur-oak
Bondia comonana
prune limb borer
Bondia comonana, known as the prune limb borer, is a small moth in the family Carposinidae. It was described by William D. Kearfott in 1907. The species occurs across western and northern North America, from the Pacific coast to the Atlantic. Its larvae are known to bore into the limbs of Prunus and Quercus species.
Carposinidae limb-borer Prunus Quercus North-America
Brachys
Leaf-mining jewel beetles
Brachys is a genus of small metallic wood-boring beetles in the family Buprestidae, tribe Trachyini. The genus contains at least 140 described species distributed primarily in North America, with some species in Central and South America. Adults are characterized by their flattened, compact, wedge-shaped morphology—distinctly different from the more typical elongate, cylindrical form of most jewel beetles. This body plan reflects their unique larval habit of mining within leaves of host plants rather than boring through wood. The genus is strongly associated with oaks (Quercus) and other hardwoods, though some species utilize diverse host plant families.
Buprestidae Agrilinae Trachyini leaf-miner oak-associate jewel-beetle metallic-wood-boring-beetle hardwood-forest phenology North-America South-America Cerrado Quercus Brachys-ovatus Brachys-aerosus Brachys-aeruginosus Brachys-querci Brachys-cephalicus Brachys-floccosus Brachys-barberi Brachys-rileyi Brachys-apachei Brachys-cleidecostae Brachys-tessellatus
Caliroa lorata
Caliroa lorata is a species of sawfly in the family Tenthredinidae. The genus Caliroa contains species commonly known as oak-skeletonizers due to their distinctive larval feeding behavior on oak leaves. Larvae feed on the undersides of leaves, consuming tissue between the veins while leaving the upper epidermis and veins intact, creating a skeletonized appearance. The species is part of a group of sawflies that exhibit host plant specialization, primarily associated with oaks (Quercus species).
sawfly oak skeletonizer folivore Tenthredinidae Hymenoptera Quercus host-specialization
Caliroa quercuscoccinae
Oak-skeletonizing sawfly
Caliroa quercuscoccinae is a sawfly species in the family Tenthredinidae. The larvae are known for skeletonizing oak leaves, feeding on the tissue between the leaf veins while leaving the veins intact. This feeding pattern creates a distinctive lace-like appearance on damaged foliage. The species is part of a genus whose larvae are commonly referred to as slug sawflies due to their slimy, slug-like appearance and locomotion.
sawfly Tenthredinidae oak skeletonizer slug-sawfly leaf-feeder Quercus Hymenoptera
Callirhytis balanopsis
Callirhytis balanopsis is a species of gall wasp in the family Cynipidae. The species induces galls on oak hosts, continuing the genus's well-documented association with Quercus species. Like other Callirhytis species, it exhibits a complex life cycle with alternating sexual and asexual generations that produce distinct gall types. The specific epithet 'balanopsis' references the acorn-like appearance of its galls.
gall-wasp Cynipidae oak-gall alternation-of-generations Quercus
Callirhytis carmelensis
Mottled Acorn Gall Wasp
A cynipid gall wasp endemic to California that induces distinctive galls on acorns of coast live oak (Quercus agrifolia) and interior live oak (Quercus wislizeni). The galls form at the acorn attachment point, often preventing normal nut development. The species produces a honeydew secretion that attracts other insects. Despite being described in 1922, it remains uncommon and poorly studied relative to other California oak gall wasps.
gall-wasp cynipidae oak-gall california-endemic acorn-gall quercus live-oak honeydew-producing-gall uncommon-species Weld-1922
Callirhytis clavula
Callirhytis clavula is a species of gall wasp in the family Cynipidae, known to induce galls on oak trees (Quercus). Like other members of the genus Callirhytis, it exhibits a complex life cycle involving alternating generations that produce different gall types on different plant tissues. The species is native to eastern North America, with records from Canada and the United States. Specific details of its gall morphology and biology remain poorly documented in the primary literature.
gall-wasp cynipid oak-gall heterogony parthenogenesis Quercus
Callirhytis congregata
sausage flower gall wasp
Callirhytis congregata is a cynipid gall wasp native to California that induces distinctive galls on the catkins of three oak species: coast live oak (Quercus agrifolia), interior live oak (Quercus wislizeni), and canyon live oak (Quercus chrysolepis). The species was originally described by William Harris Ashmead in 1896 under the genus Andricus. It is considered locally common within its range. The galls are described as rugose, yellowish-brown woody swellings with multiple cells, appearing to grow from the tips of slender twigs with a long peduncle-like base.
gall-wasp cynipidae oak california endemic catkin-gall Quercus parasitoid plant-insect-interaction cecidology
Callirhytis furva
Callirhytis furva is a species of gall wasp in the family Cynipidae. Like other members of the genus Callirhytis, it induces galls on oak trees (Quercus spp.). The species exhibits the complex life cycle typical of many cynipid wasps, with alternating sexual and asexual generations that often produce distinct gall morphologies on different plant tissues.
gall-wasp cynipid oak-gall Hymenoptera heterogony Quercus
Callirhytis gallaestriatae
Callirhytis gallaestriatae is a species of gall wasp in the family Cynipidae. As with other members of this genus, it induces galls on oak hosts (Quercus species). The species exhibits the complex life cycle typical of many cynipids, with alternating sexual and asexual generations that often produce morphologically distinct galls. The specific epithet "gallaestriatae" suggests association with galls bearing striations or stripes.
gall-wasp cynipid oak-gall heterogony Quercus
Callirhytis lanata
Callirhytis lanata is a species of gall wasp in the family Cynipidae. It induces galls on oak species (Quercus), with specific host associations and gall morphology distinguishing it from congeners. The species exhibits the typical cynipid life cycle with alternating sexual and asexual generations that produce different gall forms.
gall-wasp Cynipidae oak-gall Hymenoptera North-America Quercus
Callirhytis perditor
Callirhytis perditor is a species of gall wasp in the family Cynipidae. Like other members of its genus, it induces the formation of galls on oak trees (Quercus species). The species exhibits the complex life cycle typical of many cynipid wasps, with alternating sexual and asexual generations that often produce morphologically distinct galls on different parts of the host plant.
gall-wasp cynipid oak-gall Hymenoptera Quercus
Callirhytis quercusbatatoides
Southern Live Oak Stem Gall Wasp
Callirhytis quercusbatatoides is a cynipid gall wasp that induces stem galls on Southern live oak (Quercus virginiana) and related oak species. The species exhibits the complex life cycle typical of many oak gall wasps, with alternating sexual and asexual generations that produce morphologically distinct galls. The specific epithet 'quercusbatatoides' references the gall's resemblance to a sweet potato (batata). The species is well-documented in the southeastern United States where its host oaks are native.
cynipidae gall-wasp oak-gall stem-gall Quercus alternating-generations southeastern-US live-oak parasitoid-host plant-insect-interaction
Callirhytis quercussuttoni
Gouty Stem Gall Wasp
Callirhytis quercussuttoni is a gall wasp in the family Cynipidae that induces galls on stems of oaks in the red oak group (section Lobatae). The species is restricted to the west coast of North America, where it has been documented on coast live oak (Quercus agrifolia) and interior live oak (Q. wislizeni). Its common name refers to the swollen, irregular galls it produces on host stems.
gall-wasp Cynipidae oak-gall stem-gall Pacific-coast Quercus
Callirhytis seminosa
Callirhytis seminosa is a species of gall wasp in the family Cynipidae. Like other members of its genus, this species induces galls on oak hosts (Quercus spp.). The genus Callirhytis is known for forming distinct galls on oaks, with different species typically associated with specific oak species or gall morphologies. The specific epithet "seminosa" suggests a possible association with seed or acorn-related structures, though this remains speculative without direct observation.
cynipidae gall-wasp oak-gall hymenoptera inquiline parasitoid gall-inducer oak quercus north-america
Carmenta querci
Carmenta querci is a clearwing moth in the family Sesiidae, described by Henry Edwards in 1882. The species is known from the southwestern United States, specifically Colorado and Arizona. Larvae develop within galls on oaks, with documented associations to Quercus arizonica and Quercus oblongifolia. As a member of the Carmenta genus, it exhibits the transparent wings and wasp-mimicking appearance typical of sesiid moths.
Sesiidae clearwing-moth oak-gall Quercus Arizona Colorado Nearctic
Coptotriche zelleriella
Coptotriche zelleriella is a small moth in the family Tischeriidae, described by James Brackenridge Clemens in 1859. The species occurs across eastern North America, from Ontario and Quebec south to Florida and west to Texas and Missouri. Its larvae are leaf miners that feed exclusively on white oak group (Quercus sect. Quercus) species.
leaf-miner oak-specialist Tischeriidae Lepidoptera North-America Quercus mining-moth
Cynipini
Oak Gall Wasps
Cynipini is the largest tribe of gall wasps in the family Cynipidae, comprising approximately 936 to 1,000 described species. Members are commonly known as oak gall wasps due to their specialized association with oaks (Quercus) and other Fagaceae. The tribe is primarily distributed in the Holarctic region, with significant diversity also in Mexico and Central America. Cynipini species induce structurally diverse galls on various oak tissues including leaves, buds, branches, petioles, catkins, acorns, and roots. Most species exhibit cyclical parthenogenesis, alternating between sexual and asexual generations that often produce different gall morphotypes on the same or different host tissues.
gall-wasps oak-gall-wasps Cynipidae Quercus parthenogenesis heterogony gall-induction ecosystem-engineers inquilines parasitoids Holarctic Mexico-biodiversity Fagaceae