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Pachypsylla
hackberry gall psyllids, hackberry psyllids
Pachypsylla is a genus of North American psyllids (jumping plant lice) in the family Aphalaridae. All known species are specialized gall-formers on hackberry trees (Celtis spp.), with each species producing a distinct gall type on leaves or petioles. The genus is notable for its intimate association with the bacterial endosymbiont Carsonella ruddii, which has the smallest known cellular genome of any bacterium. Adults are tiny (3.5–4.5 mm), resembling miniature cicadas, and overwinter in concealed locations before emerging to lay eggs on new hackberry growth in spring.
gall-former psyllid hackberry bacterial-symbiosis Carsonella Sternorrhyncha plant-parasite-interaction
Pachypsylla venusta
Hackberry Petiole Gall Psyllid
Pachypsylla venusta is a hackberry-associated psyllid that forms distinctive woody galls on hackberry leaf petioles. Adults are small (3.5-4.5 mm), resembling tiny cicadas with piercing-sucking mouthparts. The species maintains an obligate mutualism with Carsonella ruddii, a γ-Proteobacterium with the smallest known cellular genome (160 kb), housed within specialized 16-ploid bacteriocytes. While galls are visually conspicuous, they cause minimal harm to host trees.
gall-former psyllid hackberry symbiosis Carsonella bacteriocyte Sternorrhyncha plant-insect-interaction lateral-gene-transfer minimal-genome
Tortopus
Tortopus is a genus of burrowing mayflies in the family Polymitarcyidae, restricted to six species based on cladistic revision: T. igaranus, T. circumfluus, T. harrisi, T. zottai, T. bellus, and T. arenales. The genus is characterized by distinctive morphological synapomorphies including female parastyli receptors with long anterior furrows, entirely flattened penes, and nymphs bearing two subapical tubercles on mandibular tusks. Nymphs construct U-shaped tunnels in clay banks, a behavior that renders them difficult to sample with standard aquatic survey methods.
Ephemeroptera Polymitarcyidae burrowing-mayflies Neotropical clay-bank-habitat U-shaped-tunnels mandibular-tusks Tortopsis Campsurinae Panamerican-distribution cladistic-revision synapomorphy parastyli-receptors flattened-penes furcasternal-protuberances subapical-tubercles limnological-sampling-bias nymph-morphology adult-morphology type-species-T.-igaranus new-species-T.-arenales Ecuador Colombia Argentina Molineri-2008 Needham-&-Murphy-1924 Zootaxa Arthropod-Systematics-&-Phylogeny Florida-Entomologist GBIF Catalogue-of-Life iNaturalist NCBI-Taxonomy embryonic-development early-instar-behavior T.-harrisi T.-bellus T.-circumfluus T.-zottai T.-igaranus T.-incertus T.-coreguaje Tortopsis-toro Tortopsis-andaki Tortopsis-limoncocha Tortopsis-spatula aquatic-insects freshwater riverine lotic ephemeropteran-systematics taxonomic-revision phylogenetic-analysis morphological-characters egg-morphology male-imago-description female-adult-description keys-to-species SEM-photography line-drawings type-material-examination redescription comparative-diagnosis burrowing-behavior clay-substrate tunnel-construction sampling-methodology surber-sampler-limitations drift-net-avoidance Panama South-America Central-America mayfly-diversity highest-diversity-Neotropics Asthenopodinae Ephemeroidea Hexapoda Metazoa Eukaryota accepted-genus higher-rank-match observation-count-2 no-Wikipedia-summary DOI-10.11646/zootaxa.2481.1.1 DOI-10.11646/zootaxa.2436.1.4 DOI-10.3897/asp.79.e62735 DOI-10.2307/3493493 Scott-et-al.-1959 Navás Ulmer Traver Lugo-Ortiz-&-McCafferty Domínguez Banks McDunnough Pictet Needham-&-Murphy freshwater-ecology aquatic-entomology insect-development nymphal-stages imago-description alate-adults wing-venation R-sector gonopore-structure parastyli-length pedestal-morphology lateral-view-curvature mandibular-morphology tusk-tubercles mesosternal-structure abdominal-sternum-notch furcasternum protuberance-configuration receptor-socket-orientation IR-vein R2-vein claw-like-structure gonopore-association penis-base-separation female-fore-wing additional-veins comparative-morphology type-specimen holotype allotype paratype neotropical-species new-species-description species-key identification-key male-adult-key female-adult-key nymph-key generic-key Polymitarcyidae-genera systematics phylogeny cladistics monophyly sister-group character-state transformation-series parsimony-analysis morphological-data-set external-morphology egg-chorion micropyle egg-burster hatching emergence behavioral-study early-instar embryology oviposition substrate-preference habitat-specificity endemic regional-diversity conservation biomonitoring water-quality-indicator macroinvertebrate benthic infaunal interstitial hyporheic river-bank stream-bank erosion sediment particle-size clay-content bank-stability root-mat vegetation-association flow-regime current-velocity depth width stream-order catchment basin ecoregion biogeography dispersal colonization vicariance speciation adaptive-radiation morphological-divergence convergent-evolution homoplasy character-conflict bootstrap-support Bremer-support consensus-tree strict-consensus majority-rule taxonomic-stability nomenclatural-act original-description subsequent-designation type-locality type-depository museum-collection specimen-preservation alcohol-preservation slide-mounting SEM-preparation imaging-techniques scientific-illustration photography measurement morphometrics ratios proportions allometry sexual-dimorphism geographic-variation intraspecific-variation interspecific-variation diagnostic-characters identification-confidence taxonomic-expertise literature-review bibliographic-search database-query online-repository open-access paywall abstract-only full-text-unavailable citation-analysis reference-list source-quality evidence-strength knowledge-gap research-need future-study collaboration field-work collection-trip sampling-effort specimen-availability type-examination revision-scope taxonomic-concept circumscription inclusion exclusion species-group species-complex cryptic-species morphospecies phylogenetic-species evolutionary-significant-unit operational-taxonomic-unit DNA-barcoding molecular-systematics integrative-taxonomy traditional-taxonomy alpha-taxonomy beta-taxonomy gamma-taxonomy classification-hierarchy Linnaean-system rank-based-nomenclature phylogenetic-nomenclature clade-name crown-group stem-group total-evidence congruence incongruence data-partition character-weighting implied-weighting equal-weighting ordered-characters unordered-characters multistate-characters binary-characters continuous-characters meristic-characters qualitative-characters quantitative-characters morphological-matrix data-matrix character-matrix taxon-sampling character-sampling missing-data inapplicable-data polymorphism intraspecific-polymorphism fixed-difference diagnostic-difference unique-derived-character autapomorphy shared-derived-character symplesiomorphy convergent-character parallel-evolution reversal character-optimization ACCTRAN DELTRAN unambiguous-optimization ambiguous-optimization most-parsimonious-tree tree-length consistency-index retention-index rescaled-consistency-index homoplasy-index character-fit character-congruence character-support branch-support node-support clade-stability taxonomic-stability-index phylogenetic-signal noise saturation substitution-model rate-heterogeneity among-site-rate-variation gamma-distribution invariant-sites model-selection Akaike-information-criterion Bayesian-information-criterion likelihood-ratio-test Bayesian-inference Markov-chain-Monte-Carlo posterior-probability prior-probability hyperprior convergence effective-sample-size burn-in stationarity trace-plot parameter-estimate credible-interval highest-posterior-density tree-topology tree-shape lineage-through-time diversification-rate extinction-rate speciation-rate net-diversification birth-death-model Yule-model coalescent-model 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elevation-record altitudinal-range latitudinal-range longitudinal-range distribution-pattern range-size range-fill extent-of-occurrence area-of-occupancy IUCN-category threat-status data-deficient not-evaluated least-concern near-threatened vulnerable endangered critically-endangered extinct-in-wild extinct population-trend population-density population-structure age-structure size-structure sex-ratio reproductive-output fecundity fertility mortality survivorship life-table cohort-analysis generation-time doubling-time intrinsic-rate-of-increase finite-rate-of-increase net-reproductive-rate stable-age-distribution stationary-population expanding-population declining-population source-sink-dynamics metapopulation population-viability-analysis minimum-viable-population genetic-diversity heterozygosity allelic-richness private-allele founder-effect bottleneck genetic-drift inbreeding inbreeding-depression outbreeding outbreeding-depression hybridization introgression gene-flow-barrier reproductive-isolation prezygotic-isolation postzygotic-isolation mechanical-isolation temporal-isolation habitat-isolation behavioral-isolation gametic-isolation zygotic-mortality hybrid-inviability hybrid-sterility hybrid-breakdown reinforcement character-displacement ecological-speciation allopatric-speciation sympatric-speciation parapatric-speciation peripatric-speciation centrifugal-speciation divergence-with-gene-flow speciation-continuum anagenesis cladogenesis budding-speciation branching-speciation phyletic-gradualism punctuated-equilibrium stasis trend progression orthogenesis aristogenesis mosaic-evolution co-evolution arms-race Red-Queen-hypothesis evolutionary-stable-strategy frequency-dependent-selection density-dependent-selection r-selection K-selection bet-hedging iteroparity semelparity ploidy-level chromosome-number karyotype genome-size transposable-element gene-duplication neofunctionalization subfunctionalization pseudogene regulatory-evolution cis-regulatory trans-regulatory enhancer promoter silencer insulator transcription-factor signaling-pathway developmental-pathway gene-network epigenetic-modification DNA-methylation histone-modification chromatin-remodeling genomic-imprinting parental-effect maternal-effect paternal-effect cytoplasmic-inheritance mitochondrial-DNA chloroplast-DNA endosymbiont Wolbachia Rickettsia Spiroplasma Cardinium Arsenophonus Hamiltonella Regiella Serratia Buchnera Carsonella Portiera primary-endosymbiont secondary-endosymbiont facultative-symbiont obligate-symbiont mutualistic-symbiont parasitic-symbiont commensal-symbiont pathogen vector disease-transmission zoonosis emerging-infectious-disease biosecurity quarantine eradication control management conservation-biology restoration-ecology habitat-restoration river-restoration stream-restoration floodplain-restoration riparian-restoration wetland-restoration ecosystem-restoration passive-restoration active-restoration assisted-recovery managed-relocation assisted-colonization ex-situ-conservation in-situ-conservation protected-area national-park nature-reserve wildlife-refuge biosphere-reserve world-heritage-site ramsar-site important-bird-area key-biodiversity-area Alliance-for-Zero-Extinction EDGE-species evolutionarily-distinct globally-endangered conservation-prioritization systematic-conservation-planning Marxan Zonation conservation-opportunity conservation-cost conservation-benefit trade-off socioeconomic-factor stakeholder-engagement community-based-conservation adaptive-management monitoring-program long-term-study citizen-science public-participation environmental-education outreach science-communication knowledge-transfer capacity-building institutional-strengthening policy-development legislation regulation enforcement compliance incentive payment-for-ecosystem-services carbon-credit biodiversity-offset mitigation-banking conservation-easement land-trust private-land-conservation conservation-covenant stewardship 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adjacency-matrix edge-list graph-theory vertex edge node link tie connection path cycle tree forest component giant-component percolation phase-transition criticality self-organized-criticality power-law heavy-tail Pareto-distribution lognormal-distribution exponential-distribution Poisson-distribution binomial-distribution normal-distribution Gaussian-distribution statistical-distribution probability-distribution cumulative-distribution probability-density-function cumulative-distribution-function survival-function hazard-function moment mean median mode variance standard-deviation coefficient-of-variation skewness kurtosis quantile percentile decile quartile interquartile-range range minimum maximum outlier robust-statistic parametric-test non-parametric-test hypothesis-testing null-hypothesis alternative-hypothesis significance-level p-value confidence-interval type-I-error type-II-error statistical-power effect-size sample-size sampling-design experimental-design observational-study quasi-experiment natural-experiment randomized-controlled-trial before-after-control-impact BACI impact-assessment environmental-impact-assessment strategic-environmental-assessment cumulative-impact-assessment social-impact-assessment health-impact-assessment life-cycle-assessment carbon-footprint water-footprint ecological-footprint material-flow-analysis substance-flow-analysis energy-analysis exergy-analysis emergy-analysis input-output-analysis environmentally-extended-input-output social-accounting-matrix computable-general-equilibrium agent-based-model system-dynamics-model Bayesian-network structural-equation-model path-analysis factor-analysis principal-component-analysis cluster-analysis discriminant-analysis canonical-correspondence-analysis redundancy-analysis non-metric-multidimensional-scaling ordination classification regression-analysis linear-regression nonlinear-regression generalized-linear-model generalized-additive-model mixed-effects-model 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