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Eustala
humpbacked orb-weavers
Eustala is a genus of orb-weaver spiders in the family Araneidae, first described by Eugène Simon in 1895. As of November 2024, the genus contains 87 species distributed primarily across the Americas, from the United States through Central America to South America, with highest diversity in Brazil, Uruguay, and Argentina. Several species have been documented exhibiting specialized ecological relationships, including myrmecophily (living among ants) in Central American species that inhabit ant-defended acacia plants. The genus includes the well-known humpbacked orb-weaver, Eustala anastera, found across North and Central America.
Araneidae orb-weaver spider humpbacked myrmecophily ant-plant-mutualism Neotropical Nearctic Eustala-anastera Eustala-oblonga Eustala-illicita web-building predator acacia Pseudomyrmex Panama Brazil Galápagos Simon-1895 arachnology entomology tropical-ecology commensalism ontogeny ballooning overwintering juvenile spider-wasp-prey Caliadurgus-hyalinatus host-parasitoid-interactions third-party-exploitation mutualism-exploitation cryptic-coloration nocturnal-foraging diurnal-hiding-behavior thorn-defense orb-web-architecture sawtoothed-web population-ecology substrate-selection spatial-distribution species-diversity endemic-species taxonomic-revision nomen-dubium genitalic-morphology microscopy-identification temperate-North-America Central-America South-America Caribbean Pacific-islands conservation-biology climate-change-vulnerability phenology-disruption winter-activity spring-emergence forest-understory dry-forest moist-forest riparian grassland scrub edge-habitat woodland parkland 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construction architecture design plan blueprint model prototype mock-up draft sketch drawing painting sculpture installation exhibition display presentation demonstration show spectacle event occasion ceremony ritual celebration festival fair bazaar commerce business industry manufacturing production fabrication assembly processing refining purification synthesis analysis separation extraction identification characterization quantification measurement assessment evaluation appraisal valuation estimation calculation computation simulation modeling prediction forecast projection scenario outlook prospect expectation anticipation hope fear worry concern care attention focus concentration awareness perception sensation feeling emotion affect mood temperament personality character disposition attitude opinion belief conviction faith trust confidence reliance dependence independence self-sufficiency self-reliance hardiness toughness strength power force energy vigor vitality life health 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licensing permitting authorizing empowering enabling allowing letting tolerating accepting receiving taking getting obtaining acquiring gaining earning winning achieving attaining reaching arriving coming approaching nearing closing converging meeting joining connecting linking binding tying fastening attaching affixing appending adding supplementing complementing completing finishing perfecting consummating fulfilling satisfying gratifying pleasing delighting enjoying relishing savoring appreciating valuing prizing treasuring cherishing nurturing cultivating fostering promoting advancing furthering encouraging supporting backing assisting aiding helping serving attending tending caring nursing healing curing treating remedying correcting rectifying repairing fixing mending restoring renewing reviving resuscitating reanimating reawakening rekindling reigniting relaunching restarting rebooting refreshing rejuvenating reinvigorating reenergizing recharging refueling replenishing restocking replacing substituting exchanging swapping trading bartering negotiating bargaining dealing transacting contracting agreeing consenting approving endorsing sanctioning ratifying confirming validating authenticating verifying checking testing examining inspecting reviewing auditing monitoring supervising overseeing managing directing leading guiding steering piloting navigating driving propelling pushing pulling dragging hauling towing carrying bearing transporting conveying transmitting sending dispatching shipping delivering distributing disseminating spreading broadcasting publishing issuing releasing launching introducing presenting showing exhibiting displaying demonstrating illustrating exemplifying typifying representing symbolizing signifying meaning denoting connoting implying suggesting indicating pointing referring alluding hinting intimating insinuating inferring deducing concluding reasoning thinking cogitating cerebrating pondering musing reflecting 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falling failing dying perishing expiring departing leaving exiting retiring resigning abdicating relinquishing surrendering yielding submitting succumbing capitulating acquiescing complying conforming adapting adjusting accommodating reconciling harmonizing synchronizing coordinating unifying standardizing normalizing regularizing systematizing methodizing rationalizing streamlining simplifying clarifying elucidating explaining interpreting translating rendering paraphrasing summarizing abstracting condensing compressing shrinking reducing decreasing diminishing lessening lowering dropping descending sinking submerging diving plunging plummeting crashing colliding impacting hitting striking knocking tapping patting touching sensing perceiving detecting discovering finding locating positioning placing putting setting laying standing sitting lying resting relaxing reposing sleeping dreaming imagining fantasizing daydreaming woolgathering praying worshiping revering venerating adoring 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laming disabling incapacitating paralyzing stunning shocking surprising astonishing amazing astounding staggering stupefying dazing bewildering confusing puzzling perplexing baffling mystifying enigmatic cryptic obscure abstruse recondite esoteric arcane occult mysterious unknown unfamiliar strange odd peculiar curious queer weird bizarre fantastic extraordinary remarkable notable noteworthy significant important momentous consequential weighty grave serious crucial vital essential necessary required needed wanted desired wished hoped expected anticipated awaited looked-for searched-for sought hunted pursued chased tracked trailed followed shadowed stalked crept crawled climbed scaled ascended mounted rose lifted elevated raised hoisted heaved hauled pulled tugged dragged drawn attracted lured enticed tempted seduced charmed enchanted fascinated captivated engrossed absorbed immersed involved engaged occupied busy active energetic dynamic vigorous forceful powerful strong mighty potent 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