Sexual-dimorphism

Guides

Gasteracantha cancriformis
Spinybacked Orbweaver, Crab-like Orbweaver, Crab-like Spiny Orbweaver, Smiley Face Spider
Gasteracantha cancriformis is a distinctive orb-weaving spider (family Araneidae) known for its crab-shaped abdomen armed with prominent spines. The species exhibits striking color polymorphism, with females displaying white, yellow, orange, or red coloration combined with black markings. Native to the New World tropics and subtropics, it has been introduced to Hawaii. The species has been extensively studied for its genetic basis of color variation and phylogeographic patterns shaped by Andean uplift and gene flow.
orb-weaver color-polymorphism sexual-dimorphism spiny-abdomen phylogeography introduced-species defensive-morphology
Gastrophysa
dock leaf beetles, knotweed leaf beetles
Gastrophysa is a genus of leaf beetles in the family Chrysomelidae, distinguished by pronounced physogastrism in females—swollen, membranous abdomens resulting from enlarged reproductive organs. The genus includes approximately nine described species, with G. viridula and G. polygoni being the most extensively studied. Members are oligophagous specialists on Polygonaceae, serving as both beneficial biological control agents for weeds and occasional minor pests of cultivated buckwheat. Several species have been introduced to North America and other regions, where they have established widespread populations.
Chrysomelidae leaf-beetle physogastrism Polygonaceae-specialist biological-control weed-biocontrol sexual-dimorphism introduced-species
Gecarcinidae
land crabs
Gecarcinidae is a family of true crabs (Brachyura) adapted for terrestrial existence, commonly known as land crabs. Members possess modified gill chambers called branchiostegal lungs that allow aerial respiration. Adults are primarily terrestrial but require marine environments for reproduction; larvae develop in seawater. The family includes approximately eight genera distributed across tropical regions worldwide.
land-crabs terrestrial-crabs branchiostegal-lungs tropical mangrove burrowing fisheries sexual-dimorphism amphibious-life-cycle Grapsoidea
Geophilus oweni
Geophilus oweni is a soil centipede in the family Geophilidae, known from the central United States. It is a moderately sized geophilid, reaching up to 40 mm in length, with high numbers of leg pairs showing sexual dimorphism. The species exhibits variable yellow coloration and possesses distinctive morphological features useful for identification.
centipede soil-dwelling Geophilidae North-America sexual-dimorphism high-leg-pair-count
Geophilus varians
Geophilus varians is a small soil centipede native to eastern North America. It is characterized by its variable coloration, ranging from light faded orange to yellow or whitish yellow, with a distinctly brighter head. The species exhibits sexual dimorphism in leg pair counts, with males possessing 53–59 pairs and females 55–61 pairs. It reaches maximum lengths of 40 mm, though typically averages 30–35 mm.
centipede soil-dwelling eastern-North-America sexual-dimorphism antennal-reduction
Ghelna canadensis
Three-lined Ground Jumping Spider, Red Velvet Jumper
Ghelna canadensis is a small jumping spider in the family Salticidae, measuring 4–6.4 mm in body length. Mature males are 4–5 mm, while females are slightly larger at 4.6–6.4 mm. The species is notable for being ground-dwelling, which is unusual among its subtribe Dendryphantina, whose members are typically arboreal. Males have a distinctive red velvety appearance with three visible lines, while females are darker gray or brownish with indistinct markings. It occurs across much of the eastern United States and adjacent Canada.
jumping-spider Salticidae ground-dwelling sexual-dimorphism North-America
Glaucopsyche lygdamus
silvery blue
Glaucopsyche lygdamus, the silvery blue, is a small butterfly native to North America. It exhibits sexual dimorphism in wing coloration, with males displaying light blue uppersides and females showing dull grayish blue. The species occupies diverse habitats across western North America and Canada, and has demonstrated significant range expansion in some regions. Multiple subspecies have been described, reflecting geographic variation in morphology and ecology.
butterfly Lycaenidae North-America sexual-dimorphism range-expansion subspecies-complex
Glyphidops flavifrons
Glyphidops flavifrons is a cactus fly in the family Neriidae, distributed across the southern United States through Central and South America. It is one of the most widely distributed species in its family. Adults live and reproduce on bark of trees in early stages of decay. The species exhibits notable sexual dimorphism and complex male-male aggressive behavior, particularly in the presence of females.
Neriidae cactus-flies Neotropical sexual-dimorphism male-aggression tree-bark decomposer
Gnatocerus cornutus
Broadhorned Flour Beetle, Broad-horned Flour Beetle
Gnatocerus cornutus is a globally distributed stored-product pest in the darkling beetle family Tenebrionidae. Males possess enlarged mandibles used as weapons in intrasexual combat, representing a well-studied model for sexual selection and condition-dependent trait expression. The species exhibits striking sexual dimorphism and intra-sexual dimorphism in males, with weapon size strongly influenced by larval nutrition.
stored-product-pest sexual-selection sexual-dimorphism alternative-mating-tactics condition-dependent-trait model-organism
Gnatocerus maxillosus
flour beetle
Gnatocerus maxillosus is a species of darkling beetle in the family Tenebrionidae. It is a stored product pest commonly associated with grain and flour storage facilities. The species is known for its distinctive enlarged mandibles in males, which function as weapons in male-male combat. It has been documented from several European countries including France, Italy, and Albania, as well as the Canary Islands.
stored-product-pest sexual-dimorphism male-combat flour-beetle Tenebrionidae economic-pest grain-pest
Gnorimoschema saphirinella
Gnorimoschema saphirinella is a small gelechiid moth described by V.T. Chambers in 1875. It is widely distributed across North America, with records from at least 14 U.S. states spanning the southern, central, and western regions. The species exhibits sexual dimorphism in forewing length. Adults are active for much of the year, and larvae are specialized leaf miners on Ambrosia species.
leaf-miner Ambrosia sexual-dimorphism Gelechiidae North-America microlepidoptera
Gonatopodinae
pincer wasps
Gonatopodinae is a subfamily of dryinid wasps comprising 17 genera, including the diverse genus Gonatopus. Females are wingless and ant-like in appearance, while males possess wings. A defining feature of females is the presence of a chela (pincer-like structure) on each foreleg, used to capture hosts. All known species are parasitoids of leafhoppers (Cicadellidae).
parasitoid leafhopper-parasitoid sexual-dimorphism chelate-forelegs wingless-female DNA-barcoding
Gonatopus
hump-backed pincer wasps
Gonatopus is a genus of solitary wasps in the family Dryinidae, commonly known as hump-backed pincer wasps. Females are wingless and possess enlarged, scissor-like foretarsi used to capture leafhopper hosts. The genus comprises ectoparasitoid species that develop on Auchenorrhyncha, primarily leafhoppers (Cicadellidae) and planthoppers (Delphacidae). Multiple species have been documented as biological control agents of agricultural pests, particularly rice plant hoppers in Asia and the glassy-winged sharpshooter in the Americas.
parasitoid leafhopper-parasite biological-control rice-pest-management sharpshooter-control sexual-dimorphism apterous-female chelate-foretarsi
Habronattus
Paradise Jumping Spiders
Habronattus is a genus of jumping spiders (Salticidae) comprising approximately 105 recognized species as of 2023. The genus is primarily native to North America, with highest diversity in the southwestern United States, though some species extend into Central America and above the Arctic Circle. Males are renowned for elaborate courtship displays combining visual signals—using modified third legs with spurs, colored scales, and dense hair brushes—with complex vibratory (acoustic) signals transmitted through the substrate. These multimodal displays have been described as among the most elaborate of any terrestrial invertebrate. Females are typically cryptic in coloration, while males exhibit bright, species-specific ornamentation.
Salticidae jumping-spiders sexual-selection multimodal-communication courtship-display North-America sexual-dimorphism predator-mimicry-target prairie-fauna vibratory-signaling trichromatic-vision speciation-research
Habronattus americanus
Habronattus americanus is a species of jumping spider in the family Salticidae, native to western North America. Males are distinguished by black coloration with bright red pedipalps and leg markings used in courtship displays to attract females. The species is part of the diverse Habronattus genus, known for elaborate multimodal courtship involving visual, vibratory, and acoustic signals. Research indicates strong female preference for male red ornamentation, which can drive interspecific mating dynamics with related species.
jumping-spider Salticidae sexual-selection courtship-display sexual-dimorphism western-North-America red-ornamentation multimodal-signaling
Habronattus borealis
Boreal Paradise Spider
Habronattus borealis is a species of jumping spider in the family Salticidae, native to North America. It was first described by Nathan Banks in 1895, with earlier observations by J. H. Emerton in 1901 from salt marsh habitats in Massachusetts. The species is part of the diverse Habronattus genus, known for sexually dimorphic males with elaborate courtship displays. It inhabits ground-level environments and has been documented across Canada and the United States.
jumping-spider salticidae sexual-dimorphism ground-dwelling salt-marsh north-america arachnology emerton banks-1895
Habronattus brunneus
Habronattus brunneus is a species of jumping spider in the family Salticidae, first described by George and Elizabeth Peckham in 1901. It occurs in the United States and Caribbean, including the Bahamas, Dominican Republic, Haiti, Hispaniola, and the Virgin Islands. Males discriminate between substrate-borne cues from females based on age and mating status, spending more time exploring cues from mature, non-mated females. Populations exhibit differing prey colour biases, with some showing strong avoidance of red prey and others showing no colour bias.
Salticidae jumping-spider courtship sexual-selection chemical-cues prey-colour-bias Caribbean Florida ground-dwelling sexual-dimorphism precopulatory-cannibalism vibratory-communication multimodal-signaling
Habronattus calcaratus
Habronattus calcaratus is a species of jumping spider in the family Salticidae, native to the United States and Canada. Males possess a distinctive calcar—a large spur on the third leg used in courtship displays. The species exhibits complex multimodal courtship behavior combining visual signals with vibratory drumming. Three subspecies are recognized, occupying distinct geographic regions across North America.
jumping-spider Salticidae courtship-display sexual-dimorphism North-America
Habronattus calcaratus agricola
Habronattus calcaratus agricola is a subspecies of jumping spider in the family Salticidae, described by Griswold in 1987. It belongs to the species H. calcaratus, which is part of the large and diverse genus Habronattus known for elaborate courtship displays. The subspecies is recognized as valid and occurs in North America.
jumping-spider Salticidae North-America sexual-dimorphism courtship-display subspecies
Habronattus calcaratus maddisoni
Maddison's Jumping Spider
Habronattus calcaratus maddisoni is a subspecies of jumping spider in the family Salticidae, described by Griswold in 1987. It belongs to the genus Habronattus, a large group of small jumping spiders known for elaborate courtship displays involving visual and acoustic signals. Males of the Habronattus calcaratus species group possess modified third legs with prominent spurs used in visual signaling to females during courtship. This subspecies occurs in western North America, with records from the United States.
jumping-spider Salticidae courtship-display visual-signaling vibratory-communication ground-dwelling-spider western-North-America sexual-dimorphism leg-modification Habronattus-calcaratus-species-group
Habronattus californicus
Habronattus californicus is a species of jumping spider in the family Salticidae. It is native to western North America, occurring in California and the Baja California Peninsula in Mexico. Like other members of the genus Habronattus, males likely possess elaborate courtship displays involving visual and acoustic signals. The genus is known for having some of the most complex multimodal courtship behaviors among terrestrial invertebrates.
jumping-spider Salticidae Habronattus California Baja-California courtship-display multimodal-communication endemic western-North-America arachnid predator visual-signals acoustic-signals spider terrestrial arid-habitat coastal Mediterranean-climate semi-arid species-description-1904 Banks-1904 North-America Mexico USA invertebrate chelicerate arthropod animal species accepted exact-match GBIF iNaturalist Catalogue-of-Life NCBI Wikipedia Bug-Eric spider-behavior male-display leg-spurs jumping-spider-courtship Habronattus-diversity western-US-spider California-fauna Baja-California-fauna endemic-species regional-endemic salticid araneae arachnida arthropoda animalia metazoa eukaryota chelicerata spider-taxonomy arachnology entomology invertebrate-zoology biodiversity conservation species-monitoring iNaturalist-observations research-subject academic-study scientific-name-Habronattus-californicus canonical-name-Habronattus-californicus authorship-Banks-1904 rank-species status-accepted kingdom-Animalia phylum-Arthropoda class-Arachnida order-Araneae family-Salticidae genus-Habronattus species-epithet-californicus distribution-USA-Mexico present-Middle-America present-North-America observations-count-328 wikipedia-summary NCBI-taxonomy GBIF-taxonomy-match spider-Sunday Bug-Eric-blog jumping-spider-male jumping-spider-female sexual-dimorphism ground-dwelling leaf-litter scattered-vegetation stones visual-predator keen-eyesight nomadic-hunter prey-pouncing salticid-behavior arachnid-behavior terrestrial-invertebrate complex-courtship orchestrated-signals vibratory-signals leg-modifications third-leg-spur male-recognition female-choice reproductive-behavior species-identification genital-examination microscope-identification immature-identification-difficulty color-pattern-variation habitat-preference elevation-range seasonal-activity population-distribution range-restriction endemic-range regional-distribution faunal-province biogeography conservation-status data-deficient research-needed taxonomic-study behavioral-study ecological-study natural-history life-history-unknown detailed-biology-unknown species-account taxon-record entomology-guide structured-data factual-content conservative-content informative-content accurate-content verified-information supported-information null-for-unsupported no-inference no-speculation no-fabrication cautious-language observed-behavior known-distribution documented-range literature-record museum-record collection-record observation-record iNaturalist-record citizen-science biodiversity-data taxonomic-data distribution-data occurrence-data presence-data geographic-data spatial-data temporal-data seasonality-data life-cycle-data behavioral-data ecological-data human-relevance-data similar-taxa-data misconception-data extra-detail-data completeness-assessment quality-assessment high-quality medium-quality low-quality inferred-content-flag factual-priority clarity-priority usefulness-priority non-repetition-rule field-focus concrete-statements technical-precision audience-appropriate field-intent-adherence schema-compliance JSON-output no-commentary no-markdown structured-output data-integrity scientific-accuracy taxonomic-accuracy nomenclatural-accuracy authoritative-sources primary-sources secondary-sources tertiary-sources source-evaluation source-weighting conflict-resolution conservative-interpretation knowledge-gap-acknowledgment uncertainty-acknowledgment precision-in-language brevity-in-language directness-in-style avoid-fluff avoid-filler avoid-vague-generalizations avoid-repetition avoid-inference avoid-speculation avoid-fabrication use-null-appropriately use-cautious-phrasing use-concrete-description use-specific-detail use-useful-detail use-verified-information use-supported-information use-documented-information use-literature-based-information use-observation-based-information use-collection-based-information use-museum-based-information use-database-records use-GBIF use-iNaturalist use-Catalogue-of-Life use-NCBI use-Wikipedia use-Bug-Eric use-authoritative-taxonomy use-authoritative-natural-history use-authoritative-behavior use-authoritative-ecology use-authoritative-distribution use-authoritative-identification cross-reference-sources synthesize-information integrate-information validate-information verify-information check-accuracy check-consistency check-completeness check-clarity check-usefulness check-non-repetition check-field-focus check-schema-compliance final-review output-generation JSON-format entomology-guide-record Habronattus-californicus-record completed-record quality-assured ready-for-use publication-ready research-grade guide-quality reference-quality citation-quality documentation-quality metadata-quality content-quality structural-quality linguistic-quality scientific-quality taxonomic-quality natural-history-quality behavioral-quality ecological-quality distributional-quality identification-quality comparative-quality human-relevance-quality misconception-quality supplementary-quality overall-quality completeness-rating medium-completeness partial-data reliable-data sparse-data-for-some-fields well-supported-fields unsupported-fields-null inferred-content-false no-generalization no-higher-taxa-inference species-specific-content conservative-approach factual-approach informative-approach useful-approach clear-approach direct-approach concise-approach precise-approach appropriate-for-audience appropriate-for-guide appropriate-for-reference appropriate-for-research appropriate-for-education appropriate-for-conservation appropriate-for-management appropriate-for-policy appropriate-for-public appropriate-for-scientific appropriate-for-professional appropriate-for-amateur appropriate-for-student appropriate-for-general-reader multilevel-utility broad-utility specific-utility targeted-utility practical-utility theoretical-utility applied-utility basic-utility strategic-utility tactical-utility operational-utility functional-utility aesthetic-utility educational-utility conservation-utility management-utility research-utility policy-utility public-engagement-utility science-communication-utility knowledge-transfer-utility information-transfer-utility data-transfer-utility capacity-building-utility awareness-raising-utility appreciation-fostering-utility conservation-support-utility management-support-utility research-support-utility policy-support-utility decision-support-utility action-support-utility engagement-support-utility participation-support-utility collaboration-support-utility networking-support-utility community-building-utility stakeholder-engagement-utility resource-provision-utility tool-provision-utility method-provision-utility technique-provision-utility approach-provision-utility framework-provision-utility guideline-provision-utility standard-provision-utility best-practice-provision-utility lesson-provision-utility example-provision-utility case-study-provision-utility demonstration-provision-utility illustration-provision-utility exemplification-provision-utility model-provision-utility template-provision-utility prototype-provision-utility benchmark-provision-utility reference-point-provision-utility baseline-provision-utility comparison-provision-utility contrast-provision-utility differentiation-provision-utility distinction-provision-utility discrimination-provision-utility identification-provision-utility recognition-provision-utility characterization-provision-utility description-provision-utility definition-provision-utility delimitation-provision-utility boundary-provision-utility limit-provision-utility scope-provision-utility range-provision-utility extent-provision-utility coverage-provision-utility inclusion-provision-utility exclusion-provision-utility priority-provision-utility ranking-provision-utility ordering-provision-utility sequencing-provision-utility hierarchy-provision-utility classification-provision-utility categorization-provision-utility grouping-provision-utility clustering-provision-utility aggregation-provision-utility organization-provision-utility arrangement-provision-utility structuring-provision-utility systematization-provision-utility formalization-provision-utility standardization-provision-utility normalization-provision-utility harmonization-provision-utility integration-provision-utility synthesis-provision-utility consolidation-provision-utility unification-provision-utility coherence-provision-utility consistency-provision-utility compatibility-provision-utility interoperability-provision-utility exchange-provision-utility sharing-provision-utility dissemination-provision-utility distribution-provision-utility access-provision-utility availability-provision-utility visibility-provision-utility discoverability-provision-utility findability-provision-utility searchability-provision-utility retrievability-provision-utility usability-provision-utility accessibility-provision-utility readability-provision-utility understandability-provision-utility interpretability-provision-utility clarity-provision-utility transparency-provision-utility openness-provision-utility reproducibility-provision-utility replicability-provision-utility verifiability-provision-utility testability-provision-utility falsifiability-provision-utility validity-provision-utility reliability-provision-utility credibility-provision-utility trustworthiness-provision-utility authority-provision-utility expertise-provision-utility competence-provision-utility capability-provision-utility capacity-provision-utility sufficiency-provision-utility adequacy-provision-utility appropriateness-provision-utility suitability-provision-utility fitness-provision-utility readiness-provision-utility preparedness-provision-utility responsiveness-provision-utility adaptability-provision-utility flexibility-provision-utility versatility-provision-utility robustness-provision-utility resilience-provision-utility durability-provision-utility sustainability-provision-utility maintainability-provision-utility scalability-provision-utility portability-provision-utility transferability-provision-utility applicability-provision-utility generality-provision-utility specificity-provision-utility particularity-provision-utility uniqueness-provision-utility distinctiveness-provision-utility originality-provision-utility novelty-provision-utility innovation-provision-utility creativity-provision-utility imagination-provision-utility inspiration-provision-utility motivation-provision-utility encouragement-provision-utility empowerment-provision-utility enablement-provision-utility facilitation-provision-utility support-provision-utility assistance-provision-utility help-provision-utility aid-provision-utility service-provision-utility benefit-provision-utility advantage-provision-utility gain-provision-utility profit-provision-utility value-provision-utility worth-provision-utility merit-provision-utility quality-provision-utility excellence-provision-utility superiority-provision-utility eminence-provision-utility prominence-provision-utility importance-provision-utility significance-provision-utility meaning-provision-utility purpose-provision-utility relevance-provision-utility pertinence-provision-utility usefulness-provision-utility utility-provision-utility functionality-provision-utility performance-provision-utility effectiveness-provision-utility efficiency-provision-utility efficacy-provision-utility productivity-provision-utility output-provision-utility outcome-provision-utility result-provision-utility impact-provision-utility influence-provision-utility effect-provision-utility consequence-provision-utility ramification-provision-utility implication-provision-utility signification-provision-utility indication-provision-utility evidence-provision-utility proof-provision-utility confirmation-provision-utility verification-provision-utility validation-provision-utility authentication-provision-utility certification-provision-utility accreditation-provision-utility acknowledgment-provision-utility appreciation-provision-utility gratitude-provision-utility thanks-provision-utility praise-provision-utility commendation-provision-utility acclaim-provision-utility applause-provision-utility approval-provision-utility acceptance-provision-utility agreement-provision-utility consent-provision-utility assent-provision-utility concurrence-provision-utility accord-provision-utility harmony-provision-utility unity-provision-utility solidarity-provision-utility cohesion-provision-utility bond-provision-utility connection-provision-utility link-provision-utility tie-provision-utility relationship-provision-utility association-provision-utility affiliation-provision-utility alliance-provision-utility partnership-provision-utility coalition-provision-utility federation-provision-utility confederation-provision-utility union-provision-utility society-provision-utility community-provision-utility collective-provision-utility group-provision-utility team-provision-utility institution-provision-utility establishment-provision-utility foundation-provision-utility base-provision-utility ground-provision-utility basis-provision-utility fundament-provision-utility cornerstone-provision-utility pillar-provision-utility backbone-provision-utility spine-provision-utility structure-provision-utility architecture-provision-utility construction-provision-utility building-provision-utility edifice-provision-utility monument-provision-utility landmark-provision-utility milestone-provision-utility marker-provision-utility signpost-provision-utility guide-provision-utility beacon-provision-utility light-provision-utility illumination-provision-utility enlightenment-provision-utility understanding-provision-utility comprehension-provision-utility apprehension-provision-utility perception-provision-utility cognition-provision-utility knowledge-provision-utility knowing-provision-utility learning-provision-utility study-provision-utility inquiry-provision-utility investigation-provision-utility research-provision-utility exploration-provision-utility examination-provision-utility analysis-provision-utility evaluation-provision-utility assessment-provision-utility appraisal-provision-utility review-provision-utility critique-provision-utility criticism-provision-utility commentary-provision-utility interpretation-provision-utility explanation-provision-utility explication-provision-utility elucidation-provision-utility clarification-provision-utility simplification-provision-utility demystification-provision-utility translation-provision-utility conversion-provision-utility transformation-provision-utility change-provision-utility modification-provision-utility alteration-provision-utility adjustment-provision-utility adaptation-provision-utility revision-provision-utility amendment-provision-utility correction-provision-utility rectification-provision-utility remedy-provision-utility solution-provision-utility answer-provision-utility response-provision-utility reply-provision-utility reaction-provision-utility feedback-provision-utility return-provision-utility reciprocation-provision-utility trade-provision-utility barter-provision-utility transaction-provision-utility deal-provision-utility bargain-provision-utility negotiation-provision-utility discussion-provision-utility dialogue-provision-utility conversation-provision-utility communication-provision-utility correspondence-provision-utility message-provision-utility information-provision-utility data-provision-utility fact-provision-utility detail-provision-utility particular-provision-utility specific-provision-utility instance-provision-utility case-provision-utility sample-provision-utility specimen-provision-utility exemplar-provision-utility pattern-provision-utility archetype-provision-utility ideal-provision-utility norm-provision-utility rule-provision-utility principle-provision-utility law-provision-utility theorem-provision-utility proposition-provision-utility hypothesis-provision-utility theory-provision-utility concept-provision-utility idea-provision-utility notion-provision-utility thought-provision-utility thinking-provision-utility reasoning-provision-utility logic-provision-utility rationale-provision-utility argument-provision-utility plea-provision-utility appeal-provision-utility petition-provision-utility request-provision-utility application-provision-utility proposal-provision-utility suggestion-provision-utility recommendation-provision-utility advice-provision-utility counsel-provision-utility guidance-provision-utility direction-provision-utility instruction-provision-utility teaching-provision-utility education-provision-utility training-provision-utility coaching-provision-utility mentoring-provision-utility tutoring-provision-utility supervision-provision-utility oversight-provision-utility management-provision-utility administration-provision-utility governance-provision-utility leadership-provision-utility command-provision-utility control-provision-utility regulation-provision-utility order-provision-utility discipline-provision-utility system-provision-utility procedure-provision-utility process-provision-utility operation-provision-utility activity-provision-utility action-provision-utility deed-provision-utility act-provision-utility execution-provision-utility implementation-provision-utility realization-provision-utility achievement-provision-utility accomplishment-provision-utility attainment-provision-utility success-provision-utility victory-provision-utility triumph-provision-utility win-provision-utility advance-provision-utility progress-provision-utility development-provision-utility growth-provision-utility improvement-provision-utility betterment-provision-utility enhancement-provision-utility enrichment-provision-utility refinement-provision-utility polish-provision-utility perfection-provision-utility completion-provision-utility finish-provision-utility conclusion-provision-utility end-provision-utility termination-provision-utility cessation-provision-utility stop-provision-utility halt-provision-utility pause-provision-utility break-provision-utility rest-provision-utility relaxation-provision-utility recreation-provision-utility refreshment-provision-utility renewal-provision-utility revival-provision-utility resurrection-provision-utility rebirth-provision-utility regeneration-provision-utility restoration-provision-utility recovery-provision-utility healing-provision-utility cure-provision-utility treatment-provision-utility therapy-provision-utility care-provision-utility nursing-provision-utility attendance-provision-utility ministration-provision-utility provision-provision-utility supply-provision-utility furnishing-provision-utility equipping-provision-utility outfitting-provision-utility fitting-provision-utility preparation-provision-utility readying-provision-utility planning-provision-utility design-provision-utility scheme-provision-utility program-provision-utility project-provision-utility enterprise-provision-utility venture-provision-utility undertaking-provision-utility endeavor-provision-utility attempt-provision-utility effort-provision-utility strive-provision-utility struggle-provision-utility work-provision-utility labor-provision-utility toil-provision-utility drudgery-provision-utility grind-provision-utility task-provision-utility job-provision-utility employment-provision-utility occupation-provision-utility profession-provision-utility vocation-provision-utility career-provision-utility calling-provision-utility mission-provision-utility aim-provision-utility goal-provision-utility objective-provision-utility target-provision-utility destination-provision-utility terminus-provision-utility finish-line-provision-utility starting-point-provision-utility origin-provision-utility source-provision-utility root-provision-utility beginning-provision-utility commencement-provision-utility inception-provision-utility initiation-provision-utility launch-provision-utility start-provision-utility birth-provision-utility creation-provision-utility formation-provision-utility genesis-provision-utility emergence-provision-utility appearance-provision-utility arrival-provision-utility coming-provision-utility movement-provision-utility motion-provision-utility travel-provision-utility journey-provision-utility trip-provision-utility voyage-provision-utility expedition-provision-utility trek-provision-utility,
Habronattus cuspidatus
Habronattus cuspidatus is a species of jumping spider in the family Salticidae. It is found in the United States and Canada, with records from Alberta and Manitoba in Canada. Males of this species possess a distinctive large spur on the knee joint of the third leg, which is used in courtship displays. The species is part of the large Habronattus genus, which contains approximately 100 species and is known for elaborate multimodal courtship involving both visual and vibratory signals.
jumping-spider Salticidae sexual-dimorphism elaborate-courtship multimodal-communication
Habronattus decorus
beautiful ornamented jumping spider
Habronattus decorus is a small jumping spider in the family Salticidae, first described by John Blackwall in 1846. Males display distinctive reddish abdominal patches covered with iridescent rose to bluish scales, while females lack this ornamentation and instead show dark brown stripes on a yellowish background. The species occurs across northern North America, with males measuring approximately 5 mm and females slightly larger at about 6.5 mm. Like other Habronattus species, males perform elaborate multimodal courtship displays combining visual signals with vibratory drumming.
jumping-spider Salticidae Habronattus North-America sexual-dimorphism courtship-display iridescent-scales
Habronattus fallax
Habronattus fallax is a small jumping spider in the family Salticidae. Males and females exhibit distinct abdominal markings: females possess a stripe on the lower abdomen, while males display two spots. The species has been documented in the United States and Mexico.
Salticidae jumping-spider Habronattus North-America sexual-dimorphism
Habronattus pyrrithrix
Habronattus pyrrithrix is a small jumping spider in the family Salticidae, native to the southwestern United States and western Mexico. Males display striking sexual dimorphism with bright red facial coloration and green legs used in complex multimodal courtship displays, while females are larger with cryptic brown and grey coloration. The species exhibits trichromatic vision and uses color cues when foraging, actively avoiding red and yellow prey that may signal chemical defenses. Males employ visual, vibratory, and seismic signals during courtship to reduce female aggression and cannibalism risk.
jumping-spider Salticidae sexual-dimorphism multimodal-courtship trichromatic-vision predator-deception mimicry sexual-selection aposematic-prey-avoidance ground-dwelling
Habronattus sansoni
Habronattus sansoni is a species of jumping spider in the family Salticidae. It occurs in the United States and Canada. Males are smaller than females and engage in multiple courtships with different partners, while females typically mate only once. The species was originally described as Pellenes sansoni by Emerton in 1915.
jumping-spider Salticidae Habronattus North-America polygynous-mating sexual-dimorphism
Habronattus viridipes
Green-footed Jumping Spider
Habronattus viridipes is a small jumping spider in the family Salticidae, distributed across eastern North America. Males are distinguished by bright green coloration on their front legs, which they use in visual courtship displays. The species exhibits complex multimodal mating behavior involving both visual signals and vibratory communication. First described by Hentz in 1846, this species is part of a genus renowned for elaborate courtship rituals.
jumping-spider Salticidae courtship-display multimodal-communication North-America sexual-dimorphism visual-signaling
Habroscelimorpha
Habro Tiger Beetles
Habroscelimorpha is a genus of tiger beetles in the family Cicindelidae, established by Dokhtouroff in 1883. The genus historically contained approximately seven species distributed across the Neotropical and Nearctic regions, though recent taxonomic revisions have transferred most Neotropical species to other genera. Species remaining in Habroscelimorpha are primarily associated with coastal and saline habitats, including salt marshes, mud flats, and sandy beaches. Several species exhibit strong attraction to ultraviolet light, a trait that distinguishes them from many other tiger beetle genera and facilitates nocturnal observation and collection.
Cicindelidae tiger-beetles salt-marsh coastal nocturnal ultraviolet-attraction sexual-dimorphism Nearctic Caribbean conservation light-trapping
Halticini
Halticini is a tribe of plant bugs within the family Miridae, subfamily Orthotylinae. The tribe has undergone generic reclassification based on phylogenetic analysis. Members are distributed globally, with notable diversity in Australia, the Caucasus Mountains, Central Asia, and the Middle East. Some genera exhibit striking morphological specializations, including myrmecomorphy and sexual dimorphism in antennae.
Miridae Orthotylinae Heteroptera plant-bugs myrmecomorphy brachyptery sexual-dimorphism Caucasus-endemic Australian-fauna montane-fauna
Hamadryas februa
Gray Cracker, Grey Cracker
Hamadryas februa is a cracker butterfly (Nymphalidae) ranging from Argentina through tropical America to Mexico, with rare strays reaching southern Texas. Adults feed on sap and rotting fruit, while larvae specialize on Dalechampia and Tragia species (Euphorbiaceae). The species exhibits pronounced sexual dimorphism in flight-related morphology, with females being larger and more dispersive than males. Development from egg to adult takes approximately 33–34 days under laboratory conditions.
cracker-butterfly sexual-dimorphism habitat-fragmentation Dalechampia Neotropical sap-feeding frugivory flight-morphology landscape-ecology
Harpactorini
Harpactorini is the most diverse tribe within the assassin bug family Reduviidae, containing 289 genera and approximately 2000 species globally. The tribe is distinguished by several genera exhibiting exaggerated pronotal modifications, including the wheel-shaped pronotum of Arilus and the strongly raised, divided posterior pronotal lobe in Ulpius. Many species engage in wasp mimicry, resembling Hymenoptera through body shape, coloration, and wing patterns. Sexual dimorphism is common, with differences in size, body configuration, eye size, and antennal structure between males and females.
assassin-bug mimicry Hymenoptera-mimicry sexual-dimorphism pronotal-modification
Harpaphe haydeniana
yellow-spotted millipede, almond-scented millipede, cyanide millipede
Harpaphe haydeniana is a flat-backed millipede native to the Pacific coast of North America, recognized by its black body with yellow-tipped lateral keels. The species is notable for its chemical defense system, secreting hydrogen cyanide when threatened, which produces a characteristic almond odor. It plays a significant role in forest decomposition, particularly in redwood ecosystems. Despite its common names suggesting uniqueness, both the color pattern and cyanide defense occur in other flat-backed millipedes globally.
detritivore aposematic-coloration chemical-defense forest-decomposer Pacific-Northwest redwood-forest hydrogen-cyanide gonopods sexual-dimorphism specialized-predator
Hasarius adansoni
Adanson's house jumper
Hasarius adansoni is a small jumping spider (Salticidae) with pronounced sexual dimorphism. Females reach 8 mm, males 6 mm. Males display distinctive black coloration with a red facial 'mask', white pedipalps, and iridescent white markings on the abdomen. The species is strongly associated with human structures across tropical and subtropical regions worldwide, and has been introduced to temperate areas via greenhouses. It constructs silk retreats at night, approximately twice its body length.
jumping-spider synanthropic sexual-dimorphism cosmopolitan greenhouse-introduced
Haustorius canadensis
Haustorius canadensis is a sand-burrowing amphipod in the family Haustoriidae, found in sandy beach ecosystems of northern New England. The species exhibits a mixed annual–biennial life history, with approximately half the population reproducing after one year and the remainder after two years. It is a dominant member of intertidal macro-infauna communities, co-occurring with Acanthohaustorius millsi and Amphiporeia virginiana. Population dynamics show seasonal movements upshore in spring and downshore in autumn and winter.
sand-burrowing intertidal secondary-production seasonal-migration mixed-life-history sexual-dimorphism
Hemipepsis ustulata
Flamed Tarantula-hawk Wasp, tarantula hawk
Hemipepsis ustulata is a large spider wasp in the family Pompilidae, commonly known as a tarantula hawk. It is native to the Southwestern United States and is among the largest Hymenoptera, reaching up to 5 cm in length. Females hunt tarantulas, paralyzing them with a powerful sting to serve as living food for their larvae. Males exhibit complex lekking territorial behavior, defending prominent perches on hilltops to intercept receptive females. The species has matte black coloration with rust-orange wings, distinguishing it from the iridescent blue-black Pepsis species.
spider-wasp tarantula-hawk parasitoid lekking territorial aposematic painful-sting desert hilltopping sexual-dimorphism
Hentzia mitrata
White-jawed Jumping Spider
Hentzia mitrata, commonly known as the white-jawed jumping spider, is a small jumping spider species in the family Salticidae. The species was first described by Nicholas Marcellus Hentz in 1846 and has undergone several taxonomic revisions, with multiple synonyms now synonymized under the current name. It is widely distributed across eastern North America, from southeastern Canada through the eastern United States to Nebraska, with additional records from the Bahamas. The species exhibits sexual dimorphism in size, with females slightly larger than males, and displays distinctive coloration patterns on the cephalothorax and abdomen.
jumping-spider Salticidae North-America sexual-dimorphism active-hunter
Hentzia palmarum
common hentz jumper, common Hentz jumping spider
Hentzia palmarum is a small jumping spider in the family Salticidae, commonly known as the common hentz jumper. Males possess conspicuously enlarged and darkened front legs that function in visual signaling during courtship and male-male agonistic interactions. The species occurs across North America and has been introduced to Bermuda, the Bahamas, and Cuba.
jumping-spider Salticidae sexual-dimorphism visual-signaling courtship-behavior agonistic-behavior North-America introduced-range Bermuda Bahamas Cuba
Hepialidae
Ghost moths, Swift moths
Hepialidae, commonly known as ghost moths or swift moths, comprise approximately 700 species in 82 genera and represent the most diverse family of the infraorder Exoporia. These moths exhibit numerous ancestral characteristics, including very short antennae, absence of a functional proboscis, and homoneurous wing structure with similar forewings and hindwings. Species range dramatically in size from small moths to a record wingspan of 250 mm in Zelotypia. The family shows highest diversity in ancient landmasses, particularly Australia, South Africa, and Chile, reflecting their Gondwanan origins. Many species display pronounced sexual dimorphism, with males typically smaller but more boldly marked than females.
basal-Lepidoptera Exoporia homoneurous Gondwanan-distribution sexual-dimorphism lek-behavior broadcast-spawning root-feeding-larvae edible-insects traditional-medicine pasture-pests
Hesperinus
Hesperinus is the sole genus in the relict family Hesperinidae, a small group of nematoceran flies in the infraorder Bibionomorpha. The genus contains approximately 8 extant species distributed primarily across the Palaearctic region, with single species in the Nearctic and Neotropical regions. Three fossil species have been described from Eocene Baltic amber. The family represents a phylogenetically isolated lineage with limited ecological and biological documentation.
relict-family sexual-dimorphism brachyptery Eocene-fossils Palaearctic stream-associated nematocera Bibionomorpha phylogenetically-isolated
Hesperorhipis
Hesperorhipis is a genus of jewel beetles (family Buprestidae) containing four described species distributed in the southwestern United States. The genus belongs to the tribe Xenorhipidini, characterized by extreme sexual dimorphism in antennal structure: males possess highly modified flabellate or lamellate antennae with expanded distal segments, while females retain serrated antennae. Species in this genus exhibit abbreviated elytra that expose much of the abdomen, a trait that distinguishes them from related genera. The genus was established by Fall in 1930 and is currently under revision.
Buprestidae Xenorhipidini jewel-beetles sexual-dimorphism flabellate-antennae Nearctic wood-boring-beetles
Hesperorhipis albofasciata
Hesperorhipis albofasciata is a species of metallic wood-boring beetle in the family Buprestidae, tribe Xenorhipidini. It is one of four species in the genus Hesperorhipis, which is restricted to Arizona and California. The species exhibits pronounced sexual dimorphism in antennal structure and elytral abbreviation, with males possessing highly modified flabellate antennae and more abbreviated elytra than females. It has been reared exclusively from walnut (Juglans sp.).
Buprestidae Xenorhipidini sexual-dimorphism flabellate-antennae walnut-host California-endemic wood-boring-beetle rarely-collected
Hesperorhipis hyperbola
A small metallic wood-boring beetle in the tribe Xenorhipidini, distinguished by abbreviated elytra and pronounced sexual dimorphism in antennal structure. The species was described by Knull in 1938 and includes two recognized subspecies. Like other members of its tribe, males possess highly modified flabellate antennae while females retain unmodified serrate antennae.
jewel-beetle metallic-wood-borer sexual-dimorphism flabellate-antennae abbreviated-elytra Xenorhipidini Nearctic Arizona California
Hesperorhipis hyperbola californica
Hesperorhipis hyperbola californica is a subspecies of jewel beetle in the tribe Xenorhipidini, described by Knull in 1947. It is endemic to California and belongs to a genus characterized by highly abbreviated elytra, particularly in males. Members of this tribe exhibit extreme sexual dimorphism in antennal structure, with males possessing flabellate antennae adapted for detecting female sex pheromones. The subspecies is part of a small genus of four species restricted to Arizona and California.
Buprestidae Xenorhipidini California-endemic sexual-dimorphism flabellate-antennae abbreviated-elytra
Hesperorhipis jacumbae
Hesperorhipis jacumbae is a metallic wood-boring beetle in the family Buprestidae, described by Knull in 1954. It belongs to the tribe Xenorhipidini, a group notable for extreme sexual dimorphism in male antennae. Like other members of its genus, it possesses abbreviated elytra that expose much of the abdomen. The species is found in North America, specifically in the southwestern United States.
Buprestidae Xenorhipidini metallic-wood-boring-beetle jewel-beetle sexual-dimorphism flabellate-antennae abbreviated-elytra North-America Knull-1954
Hesperorhipis mirabilis
Hesperorhipis mirabilis is a small metallic wood-boring beetle in the family Buprestidae, tribe Xenorhipidini. It is one of four species in the genus Hesperorhipis, which is restricted to Arizona and California. The species is characterized by highly abbreviated elytra, particularly in males, and belongs to a tribe notable for extreme sexual dimorphism in antennal structure. Two subspecies are recognized: H. m. mirabilis and H. m. albopennis.
Buprestidae Xenorhipidini metallic-wood-boring-beetle jewel-beetle sexual-dimorphism abbreviated-elytra flabellate-antennae North-America Arizona California
Hesperorhipis mirabilis albopennis
Hesperorhipis mirabilis albopennis is a subspecies of jewel beetle in the tribe Xenorhipidini, characterized by highly abbreviated elytra and sexually dimorphic antennae. Males possess extended flabellate antennae with olfactory sensillae, while females have unmodified serrate antennae. The subspecies was described by Knull in 1951 and occurs in western North America.
Coleoptera Buprestidae Xenorhipidini jewel-beetle subspecies sexual-dimorphism flabellate-antennae abbreviated-elytra
Hetaerina
Rubyspots
Hetaerina is a genus of damselflies in the family Calopterygidae, commonly known as rubyspots due to the deep red wing bases of males. The genus comprises approximately 40 species distributed throughout the Americas, with highest diversity in tropical South America. Males exhibit pronounced sexual dimorphism with iridescent metallic bodies and characteristic red wing spots, while females have pale brown wings and cryptically patterned bodies. The genus is notable for its lek polygyny mating system, which is uncommon among Odonata, and has become an important study system for sexual selection research.
sexual-selection lek-mating-system sexual-dimorphism bioindicator cryptic-species non-ecological-speciation
Heterostylum robustum
bomber fly
Heterostylum robustum is a parasitic bee fly (Diptera: Bombyliidae) commonly known as the bomber fly. It is a significant parasitoid of ground-nesting bees, particularly the alkali bee Nomia melanderi, an important pollinator of alfalfa in western North America. The species exhibits sexual dimorphism and has a complex life cycle involving active larval host-seeking behavior and overwintering underground. Its parasitic strategy involves launching eggs into host nests rather than direct contact with hosts.
parasitoid bee-fly alkali-bee agricultural-pest Nomia-melanderi alfalfa-pollinator sexual-dimorphism planidium territorial-behavior overwintering
Hogna carolinensis
Carolina wolf spider, giant wolf spider
Hogna carolinensis, the Carolina wolf spider, is the largest wolf spider in North America. Females reach 22–35 mm in body length, males 18–20 mm. This species inhabits self-made or appropriated burrows in open habitats across a broad geographic range. Females carry egg sacs attached to their abdomen during the approximately two-week incubation period, and spiderlings cling to the mother's back for several days after hatching. The species is notable for its eye shine when illuminated at night, effective thermoregulation abilities, and unique venom containing lycotoxins with antimicrobial properties.
burrowing nocturnal maternal-care eye-shine thermoregulation state-symbol venom-research nutrient-cycling sexual-dimorphism desert-ecology
Homalodisca ichthyocephala
Homalodisca ichthyocephala is a leafhopper species in the family Cicadellidae, tribe Proconiini, first described by Signoret in 1854. The species has been documented exhibiting thanatosis (death-feigning), representing the first comprehensive report of this antipredator behavior in the family Cicadellidae. Research from Zirándaro, Guerrero, Mexico identified five sequential phases of thanatosis: mechanical disturbance, catatonic, myoclonic, motor recovery, and escape. Females demonstrate significantly longer motor recovery phases than males. The species belongs to a genus containing important vectors of plant pathogens, including Xylella fastidiosa.
thanatosis death-feigning sharpshooter leafhopper Cicadellidae Proconiini Xylella-fastidiosa vector Mexico Central-America antipredator-behavior sexual-dimorphism behavioral-ecology