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Sydney funnel-web spider

The Sydney funnel-web spider (Atrax robustus) is a large, shiny black mygalomorph spider native to eastern Australia, renowned for its potent neurotoxic venom that ranks among the most dangerous to humans.^[1] Measuring 2.0–4.0 cm in body length, it features a robust build, finger-like spinnerets at the abdomen's end, and, in males, a prominent mating spur on the second pair of legs; females are generally larger and more sedentary, while males are more mobile and aggressive during the breeding season.^[1] This species belongs to the Atracidae family and is one of five species in the genus Atrax, distinguished by its funnel-shaped silk retreats rather than typical orb webs.^[2] Primarily found within approximately 100 km of Sydney, the Sydney funnel-web inhabits moist, sheltered environments such as bushy suburban gardens, sclerophyll forests, and woodlands, where it constructs silk-lined burrows up to 60 cm deep with a funnel-like extension for ambushing prey.^[1] Its distribution extends from the Central Coast southward to the Georges River, westward to Baulkham Hills, and includes scattered records in the Blue Mountains and around Wollongong, though it avoids arid or coastal dune areas.^[1] These spiders are ground-dwellers, often burrowing under rocks, logs, or bark, and their populations thrive in humid conditions, making urban fringes particularly risky for encounters.^[3] Behaviorally, Sydney funnel-webs are solitary predators that feed on insects like beetles and cockroaches, as well as small vertebrates such as frogs and lizards, using their large fangs to inject venom and subdue prey.^[1] Males leave their burrows in summer and autumn to search for females, wandering into homes, clothing, or swimming pools, which increases human encounters; when threatened, both sexes display aggression by rearing up and biting repeatedly.^[1] Reproduction involves males producing sperm webs for transfer, but courtship can be fatal for males if the female attacks post-mating; females guard egg sacs containing 100–200 eggs, with spiderlings dispersing after hatching.^[1] The spider's venom, composed of atracotoxins, targets the nervous system, causing rapid symptoms like muscle spasms, hypertension, and respiratory failure, particularly potent in male venom which is up to six times stronger than females'.^[4] Prior to 1981, 13 human deaths were recorded from bites, all attributed to males, with 30–40 envenomations occurring annually in New South Wales. An effective antivenom, developed by immunizing rabbits with male venom at the Commonwealth Serum Laboratories, was introduced in 1981 and has prevented all fatalities since, though immediate first aid—such as pressure immobilization bandages—and hospital treatment remain essential.^[5] Ongoing venom extraction programs at facilities like the Australian Reptile Park ensure antivenom supply, highlighting the species' medical significance despite no current threat to human life with proper care.^[5]

Taxonomy and phylogeny

Classification

The Sydney funnel-web spider bears the binomial name Atrax robustus O. Pickard-Cambridge, 1877, originally described from a female specimen collected in New South Wales, Australia. This naming reflects its robust build and placement within the genus Atrax, established by the same author for this type species.^[6] The species is classified in the family Atracidae Hogg, 1901, a group of mygalomorph spiders endemic to Australia known as funnel-web spiders, which was elevated from subfamily status within Hexathelidae to full family rank based on phylogenetic analyses.^[7] The genus Atrax O. Pickard-Cambridge, 1877, comprises five accepted species, including A. christenseni Dupérré & Smith, 2025, A. montanus (Rainbow, 1914), A. robustus, A. sutherlandi Gray, 2010, and A. yorkmainorum Gray, 2010, all restricted to eastern Australia.^[6] Historically, A. robustus was initially placed in the subfamily Euctimeninae of the family Dipluridae upon description; it was later transferred to Hexathelidae by Raven in 1980 and subsequently to Atracidae following revisions that recognized distinct morphological and molecular traits separating Australian funnel-webs from other hexathelids.^[6] A 2025 study confirmed that the traditional concept of A. robustus represents a species complex, describing A. christenseni as a new species from the Newcastle region and restricting A. robustus to the Sydney metropolitan area southward, while recognizing A. montanus in the Blue Mountains.^[2] Diagnostic features distinguishing Atrax robustus within Atracidae include its robust chelicerae bearing a series of small, obliquely aligned teeth along the retrolateral furrow, facilitating prey capture, and notably long spinnerets—among the longest in the family—with the median pair exceeding the length of the paturon. These traits, combined with a broad clypeus and two pairs of spinnerets (lacking a median pair of small ones), align it closely with congeners while differentiating it from the related genus Hadronyche, which includes several tree-dwelling funnel-web species.

Evolutionary relationships

The Sydney funnel-web spider (Atrax robustus) is positioned within the infraorder Mygalomorphae as part of the family Atracidae, which phylogenomic analyses place as sister to Actinopodidae in a clade that diverged from other mygalomorph lineages approximately 98 million years ago during the Late Cretaceous.^[8] This divergence reflects broader patterns in mygalomorph evolution, where Atracidae emerged from tarantula-like ancestors (Avicularioidea) much earlier, around 200–250 million years ago, but underwent significant radiation in Australia following Gondwanan vicariance events.^[9] The isolation of the Australian continent facilitated the development of unique adaptations, including a robust, heavily sclerotized body suited for burrowing in humid, forested soils—a primitive mygalomorph trait that evolved in response to the stable, moist environments of ancient Gondwana.^[2] These features distinguish Atracidae from more derived mygalomorph groups like tarantulas, emphasizing their retention of basal burrowing behaviors amid continental isolation. Genetic studies highlight the adaptive evolution of A. robustus venom, which has diverged from typical mygalomorph profiles through extensive gene duplication and neofunctionalization of toxin families, particularly δ-hexatoxins (δ-HXTXs).^[10] Unlike the venoms of most invertebrate-prey specialists in Mygalomorphae, which primarily target insect ion channels, δ-HXTXs in funnel-web spiders have evolved to potently inhibit vertebrate voltage-gated sodium channels, enhancing lethality against mammalian predators and incidentally humans.^[10] This vertebrate-oriented venom composition likely arose as a defensive innovation in Australia's predator-scarce but increasingly mammalian-influenced ecosystems post-Gondwana, with sequence conservation across species indicating deep evolutionary origins within the Atracidae clade dating back tens of millions of years.^[9] The 2025 taxonomic revision further clarifies that venom potency variations, such as in A. christenseni, stem from shared ancestral traits within the Atrax complex.^[2] Fossil evidence for related atracid-like mygalomorphs from Miocene deposits in Australia, such as amber-preserved burrowing spiders, underscores the long-term persistence of funnel-web ecological niches in the region.^[11] These records, combined with molecular clock estimates, suggest that the ancestors of modern Atracidae occupied similar Gondwanan habitats as early as the Eocene-Oligocene transition around 40–50 million years ago, aligning with Australia's final separation from Antarctica and the onset of aridification that shaped burrowing adaptations.^[2] Within the genus Atrax, A. robustus shares close phylogenetic ties with species like A. christenseni and A. montanus, diverging from the related genus Hadronyche in the Late Cretaceous, approximately 70–100 million years ago.^[2]

Physical characteristics

Morphology

The Sydney funnel-web spider (Atrax robustus) is a robust mygalomorph arachnid with a body length typically ranging from 20 to 40 mm in adults, where females measure up to 40 mm and males up to 30 mm, and a leg span that can reach up to 75 mm.^[3]^[12]^[13] The overall build is sturdy, with females generally larger and more robust than males.^[4] The cephalothorax is glossy and nearly hairless, appearing smooth and blue-black to black in coloration, while the abdomen is matte and similarly dark.^[12]^[1] The legs are strong and robust, equipped with spines along the tibiae and metatarsi.^[14] Prominent fangs, part of the chelicerae, measure up to 5 mm in length and are capable of delivering a powerful bite.^[15] The spider features eight eyes arranged in two rows but lacks color vision, relying instead on tactile setae distributed across the body and legs to detect vibrations and environmental cues.^[16] At the posterior end of the abdomen are distinctive finger-like spinnerets, used for producing silk.^[1] Adult coloration is uniformly dark.^[17]

Sexual dimorphism

The Sydney funnel-web spider (Atrax robustus) exhibits pronounced sexual dimorphism, with females generally larger and more robust than males. Adult females measure 35–40 mm in total length and 12 mm in width, while males are smaller at 25–30 mm in length and 8 mm in width.^[18] This size disparity contributes to females having a stockier build suited to maintaining permanent burrows, whereas males possess a slenderer form with proportionally longer legs that facilitate wandering in search of mates.^[4]^[3] Males are distinguished by prominent bulbous pedipalps used for sperm transfer and tibial spurs on the ventral side of the second pair of legs, which develop upon reaching sexual maturity around the fifth year of life.^[18]^[19] These structures, along with their lighter build, imply a more mobile and potentially aggressive lifestyle post-maturity. In contrast, females lack these spurs and instead feature larger chelicerae, which become more pronounced at maturity and support their sedentary, burrow-dwelling existence.^[18] These morphological differences have significant survival implications. Females can live 2–10 years in captivity and potentially up to 20 years under natural conditions, allowing multiple breeding cycles.^[18]^[20] Males, however, typically survive only 6–9 months after maturing, with an average of 3 months under frequent handling, reflecting the risks associated with their dispersive behavior.^[18]

Distribution and ecology

Geographic range

The Sydney funnel-web spider (Atrax robustus) is endemic to New South Wales, Australia, with its native range confined to the Sydney Basin bioregion.^[1]^[2] The species' distribution centers on the Sydney metropolitan area, extending northward to the Central Coast, southward to the Georges River and Stanwell Tops near Wollongong, and westward into the lower Blue Mountains.^[1]^[2] Following a 2025 taxonomic revision that split the complex into three species, the range of A. robustus is now more narrowly defined from the Central Coast southward to the Georges River, westward to Baulkham Hills, with scattered records in the Blue Mountains and around Wollongong, and its core habitat in the leafy northern suburbs such as those on the Hornsby Plateau.^[21]^[2] Overall, the species occupies an area within a 100-160 km radius of central Sydney, at elevations generally below 1,000 m, though records extend into foothill regions of the Blue Mountains.^[3]^[22]^[2] Urban expansion has facilitated its presence in Sydney suburbs, particularly in modified habitats with retained moist, upland forest remnants like those on the Woronora Plateau to the south.^[4] No established populations exist outside Australia, as the species is non-migratory and dispersal is limited by its dependence on specific moist clay, shale, or basaltic soil types suitable for burrowing.^[18]^[23] Occasional vagrants, primarily wandering males, appear in gardens or via human-transported soil and rocks, but these do not lead to viable expansions beyond the native range.^[18]^[24]

Habitat preferences

The Sydney funnel-web spider (Atrax robustus) prefers moist, loamy soils in forested and suburban environments, where it constructs burrows to maintain humidity levels essential for its survival. These spiders are commonly found in lush, shaded gullies and south- or east-facing slopes within open and closed sclerophyll forests, woodlands, and bushy suburban gardens, avoiding drier or sandy areas that would lead to desiccation. High soil moisture is critical, as the species thrives in areas with consistent dampness, such as under compost heaps or in garden rockeries, which help regulate the microclimate around their silk-lined burrows.^[3]^[1] Shelter preferences center on protected, humid microhabitats that provide stability against environmental fluctuations. Burrows are typically excavated in soil banks, beneath rocks, fallen logs, or at the bases of trees, extending 20 to 60 cm deep with trip-line extensions for prey detection. In urban settings, they adapt to similar sheltered sites, including moist soil under houses, crevices in retaining walls, or along poolside edges, where cool and dark conditions mimic natural refuges. These locations allow the spiders to remain concealed during the day while facilitating access to foraging areas at night.^[3]^[1] The species is suited to temperate, humid climates with mild temperatures, showing reduced activity during extreme heat or cold that could disrupt burrow humidity. Optimal conditions include shaded, cool daytime environments and humid nights, which prevent dehydration and support metabolic functions; prolonged exposure to dry conditions can be lethal. Within their range, A. robustus coexists with other mygalomorph spiders, such as the southern Sydney funnel-web (Atrax montanus), partitioning burrow sites through microhabitat selection to minimize direct competition.^[1]^[25]

Behavior and life cycle

Daily activities and web construction

The Sydney funnel-web spider exhibits predominantly nocturnal habits, remaining active primarily at night when it forages or maintains its territory, while retreating into its burrow during the day to avoid desiccation and predation.^[1] This behavior is particularly pronounced in males, who wander more extensively at night during the summer months, often leaving their burrows to explore surrounding areas.^[4] Females, in contrast, tend to stay closer to their established burrows, which are typically located in moist, shaded soil in gardens, under rocks, or at the base of trees.^[17] The spider's web construction centers on a silk-lined tubular retreat dug into the ground, forming a secure burrow that can extend up to 60 cm deep.^[1] From the burrow entrance, the spider weaves a funnel-shaped silk sheet that acts as an extension of the trap, with irregular trip-lines radiating outward like spokes to detect vibrations from potential prey or intruders.^[4] Unlike orb-weaving spiders, this structure is not a classic web but a ground-based ambush system, where the silk is periodically repaired or extended as needed.^[4] As an ambush predator, the Sydney funnel-web spider positions itself at the burrow entrance, relying on the sensitivity of its trip-lines to vibrations to alert it to passing prey, which it then rapidly captures with a swift lunge.^[1] Its diet primarily consists of insects such as beetles, cockroaches, and larvae, though it occasionally preys on small vertebrates like frogs or lizards that venture near the burrow.^[1] Seasonal activity intensifies during the warmer months from November to April, when higher temperatures and humidity prompt increased foraging and movement, particularly among males; activity diminishes in winter, with spiders entering a period of reduced metabolic rate and minimal surface exposure.^[4]

Reproduction and development

Males of the Sydney funnel-web spider (Atrax robustus) become sexually mature at around four years of age and leave their burrows during the summer and autumn breeding season to search for receptive females, often wandering at night over distances of several hundred meters.^[3] Upon encountering a female's web, the male produces vibrations by tapping the silk trip lines with his legs to announce his presence and avoid aggression. Courtship follows, featuring ritualized displays such as leg waving, palp rubbing against the substrate, and abdominal pressing, which typically last 2-10 minutes and culminate in the transfer of sperm via the male's palps after he constructs a small sperm web to collect the semen.^[26]^[27] Copulation itself is brief, often under a minute, and males may mate with multiple females before dying shortly after the season ends.^[26] Following successful mating, the female produces one or more white, spherical silk egg sacs in late spring or summer, each containing 100-200 eggs, which she constructs within her burrow and attaches to the silk lining.^[28]^[29] The female guards the egg sac aggressively until the spiderlings hatch, remaining nearby and providing limited protection, after which the spiderlings stay clustered with the mother for a brief period before dispersing to build their own burrows; cannibalism among siblings is common and contributes to high early-stage mortality rates exceeding 90%.^[29] Spiderlings disperse from the maternal burrow by walking, typically after their first molt, marking the end of maternal protection.^[30] Development proceeds via molting, with juveniles constructing smaller versions of adult burrows and feeding on small insects; full maturity is reached after approximately 4-5 years, with females maturing at about five years and living up to 10 years or more, while males have shorter post-maturity lifespans of 6-9 months.^[3] This extended developmental period reflects the spider's adaptation to its stable, moist habitat, where growth is gradual and tied to seasonal conditions.^[20]

Venom and interactions with humans

Venom properties

The venom of the Sydney funnel-web spider (Atrax robustus) primarily consists of peptide neurotoxins, with robustoxin (also known as δ-atracotoxin-Ar1 or δ-HXTX-Ar1a) serving as the principal lethal component in males. This 42-amino-acid polypeptide targets voltage-gated sodium channels in nerve cells, binding to site-3 on the channel's extracellular surface to inhibit inactivation. This action prolongs sodium influx during action potentials, leading to repetitive neuronal firing and massive release of neurotransmitters such as acetylcholine at neuromuscular junctions.^[31]^[10]^[32] Robustoxin exhibits high potency against vertebrates, with an LD₅₀ of approximately 0.16 mg/kg via subcutaneous injection in newborn mice, underscoring its mammalian toxicity. In contrast, the venom shows minimal insecticidal activity, as δ-hexatoxins like robustoxin are largely ineffective against arthropods, relying instead on other components for prey immobilization. This vertebrate specificity highlights an evolutionary divergence in toxin function.^[15]^[10] The spider possesses large venom glands extending posteriorly from the chelicerae into the prosoma, enabling substantial yields of up to 2 mg of crude venom per milking in adult males, compared to less than 0.5 mg in females. Fangs, measuring 4-5 mm in length, deliver 0.5-2 mg during a bite, sufficient for rapid envenomation. Male venom is notably more potent due to higher concentrations of robustoxin, enhancing lethality to vertebrates. Evolutionary adaptations in the venom appear geared toward subduing large vertebrate predators rather than primary insect prey, with δ-hexatoxins providing defensive potency during male dispersal. Research on venom peptides began in the 1970s, culminating in robustoxin's isolation and sequencing in the mid-1980s, which facilitated antivenom development.^[10]

Bite effects and symptoms

The bite of the Sydney funnel-web spider (Atrax robustus) typically involves a painful puncture wound due to the spider's large chelicerae, which can penetrate clothing and deliver venom rapidly through subcutaneous injection. Local effects at the bite site often include intense pain, a wheal with surrounding erythema, localized sweating, piloerection, and minor swelling, though significant tissue damage or necrosis is uncommon. Muscle fasciculations may occur locally shortly after the bite.^[33]^[34] Systemic envenomation, if it occurs, manifests as an autonomic storm characterized by hypertension, tachycardia, profuse salivation, lacrimation, diaphoresis, and piloerection across the body. Neuromuscular symptoms include widespread muscle fasciculations, twitching, hyperreflexia, and occasionally tetany or myoclonus, while respiratory effects can involve laryngeal spasm, stridor, and pulmonary edema. Other early systemic signs encompass perioral tingling or numbness, nausea, vomiting, agitation, confusion, and metabolic acidosis; in severe cases, cardiac arrhythmias or arrest may develop.^[33]^[35] Symptoms of severe envenomation typically onset within 10 to 30 minutes of the bite, with a median time of 28 minutes reported across documented cases, though progression can extend to 175 minutes in some instances. Most recorded severe cases showed initial symptoms within 30 minutes. The venom's neurotoxic components, particularly δ-atracotoxins prevalent in male spiders, drive this rapid physiological disruption.^[36]^[33] Severity is influenced by several factors, including the spider's sex, with male bites causing more potent envenomation due to higher concentrations of key neurotoxins, accounting for all 13 historical fatalities prior to antivenom availability. Children are particularly vulnerable owing to lower body mass and immature physiological responses, experiencing faster symptom progression and higher risk of complications. Untreated systemic envenomations had a high fatality rate, with 13 deaths out of 23 recorded cases prior to 1981. Only about 10-15% of bites result in significant envenomation, with the remainder causing mild or no systemic effects.^[36]^[4]^[33] In Australia, Sydney funnel-web spider bites number approximately 30-40 annually, primarily in New South Wales, with most occurring during warmer months when males are more active. Since the introduction of effective antivenom in 1981, all cases have been non-fatal when treated promptly, reflecting a dramatic reduction in mortality from pre-antivenom levels.^[37]^[4]

Medical treatment

The primary first aid for a suspected Sydney funnel-web spider bite involves applying a pressure immobilization bandage to the bitten area and immobilizing the affected limb to slow venom spread, while avoiding any movement of the patient and seeking immediate transport to a hospital.^[38]^[39] This technique, which uses a firm elastic bandage applied from the bite site proximally with the limb splinted, has been standard since the 1980s and is critical for bites from this species due to the rapid onset of severe symptoms.^[40] Funnel-web spider antivenom was developed in 1981 by the Commonwealth Serum Laboratories (now Seqirus) through immunization of rabbits with venom extracted ("milked") from male Sydney funnel-web spiders (Atrax robustus), marking a pivotal advancement in managing envenomations from this and related species.^[36]^[41] The resulting CSL Funnel-web Spider Antivenom is administered intravenously after reconstitution, with no need for premedication in most cases, and has proven effective against bites from other funnel-web genera like Hadronyche.^[41]^[42] The recommended initial dosage is typically 1-2 vials (each containing 100 mg of IgG), with additional vials given if symptoms persist, though most cases resolve with 1-3 vials total; this antivenom neutralizes the key neurotoxin robustoxin, often reversing systemic effects within 1-4 hours of administration.^[33]^[36]^[4] In clinical reviews, antivenom achieved complete symptom resolution in 97% of treated patients, including children, underscoring its high efficacy even in moderate to severe envenomations.^[36] Contemporary management protocols emphasize rapid antivenom delivery in a hospital setting, often with intensive care unit monitoring for patients showing systemic symptoms such as autonomic instability or respiratory compromise, alongside supportive measures like oxygen and fluid resuscitation but without routine use of adjunctive medications like sedatives or vasopressors.^[33]^[43] Since the antivenom's introduction, there have been no recorded fatalities from Sydney funnel-web spider bites in Australia, reflecting the success of these integrated protocols.^[4]^[36]

Conservation and cultural significance

Protection status

The Sydney funnel-web spider (Atrax robustus) is not classified as a protected species under Australian federal or New South Wales state legislation, allowing for its collection and handling under specific research or venom production protocols without special permits.^[44] Despite this, the species faces potential threats from ongoing urbanization and habitat fragmentation in its native Sydney Basin range, which can disrupt burrow sites in moist, sheltered areas, as well as indirect impacts from pesticide applications in residential and agricultural zones.^[2] However, populations remain stable and locally abundant, with evidence of successful adaptation to urban environments, including gardens and building foundations, contributing to sustained numbers despite human expansion.^[18] No formal population estimates exist, but the species is considered of least concern with no assessment on the IUCN Red List, though the 2025 taxonomic revision (published January 13, 2025) splitting the former A. robustus complex into three distinct species—A. robustus (restricted to the Sydney metropolitan region), A. montanus (southern Sydney and Illawarra regions), and A. christenseni (Newcastle region)—may necessitate separate future evaluations for each, given their differing ranges and potential vulnerabilities.^[2] Monitoring occurs through institutions such as the Australian Museum and the Australian Reptile Park, which track encounters and collections to support venom research and assess distribution trends.^[45] In response to encounters, relocation efforts emphasize ethical handling over extermination, particularly to aid antivenom production; the Australian Reptile Park runs a public drop-off program encouraging safe capture using sealable plastic containers without direct contact, as the spiders cannot climb smooth surfaces.^[28] These guidelines prioritize human safety while preserving spiders for milking, with over 2,000 specimens donated annually in peak seasons to maintain antivenom stocks.^[46]

Role in research and culture

The venom of the Sydney funnel-web spider (Atrax robustus) has been a focal point in neuropharmacological research since the 1980s, particularly for its peptides that modulate voltage-gated sodium ion channels. The primary lethal component, robustoxin, was isolated in 1983 and characterized for delaying sodium channel inactivation, leading to prolonged action potentials and neurotoxic effects; this discovery facilitated early electrophysiological studies on ion channel gating mechanisms.^[47] Subsequent analyses of δ-atracotoxins (δ-HXTXs), key venom peptides, revealed their high potency in primates and potential as molecular probes for sodium channel subtypes, advancing understanding of neuronal excitability disorders.^[48] These peptides have shown promise in drug development, with δ-HXTXs explored for pain management due to their interaction with sensory neuron channels and for insecticides targeting insect sodium channels, though clinical applications remain preclinical.^[10] Cardiovascular effects of the venom, including hypertension induction, have also prompted investigations into peptide derivatives for treating stroke and heart conditions by modulating ion channel activity.^[49] In captivity, Sydney funnel-web spiders are bred and maintained at the Australian Reptile Park in New South Wales, the sole facility producing antivenom since 1981 through a venom-milking program that relies on public donations and captive breeding to sustain stocks.^[5] The park houses hundreds of specimens in controlled enclosures, using breeding pairs to produce spiderlings that support antivenom yields; no human fatalities from bites have occurred since the program's inception.^[50] Public displays at the park and zoos like Taronga Zoo educate visitors on the species' biology and dangers, featuring live exhibits in secure habitats to demystify the spider while emphasizing safe handling.^[51] Culturally, the Sydney funnel-web spider symbolizes Australia's perilous wildlife, embedded in Sydney folklore as a harbinger of danger since colonial times, with tales exaggerating its aggression to reflect broader fears of the untamed bush.^[4] In media, it gained international notoriety through films like Crocodile Dundee (1986), where protagonist Mick Dundee boasts of its lethality compared to the American black widow, reinforcing stereotypes of Australian ruggedness and hazard.^[52] Recent genomic studies in the 2020s have provided insights into the species' biodiversity, revealing through DNA sequencing and phylogenetics that what was classified as A. robustus comprises three distinct species across Sydney's regions, enhancing conservation genetics and evolutionary understanding of funnel-web diversification.^[2]

References

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Bite causes severe local pain, in part due to mechanical injury from large powerful fangs. Some local erythema may develop. Local necrosis not recorded.Missing: Pocock 1902<|control11|><|separator|>
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Funnel web spiders are typically sturdy, glossy black spiders with a hard carapace, large fangs, and long, strong legs. Their bodies can grow up to 5 ...The Role Of The Australian... · Funnel Web Breeding Program · Silk-Lined Burrows And...
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[30]
Synthesis and characterization of delta-atracotoxin-Ar1a, the lethal ...
Delta-atracotoxin-Ar1a (delta-ACTX-Ar1a) is the major polypeptide neurotoxin isolated from the venom of the male Sydney funnel-web spider, Atrax robustus.Missing: atracotoxins | Show results with:atracotoxins
[31]
Characterisation of the effects of robustoxin, the lethal neurotoxin ...
The present study investigates the actions of robustoxin (atracotoxin-Ar1) purified from the venom of the male Sydney funnel-web spider Atrax robustus on sodium ...
[32]
Funnel-Web Spider Toxicity - StatPearls - NCBI Bookshelf - NIH
Feb 26, 2024 · The Hadronyche, Illawarra, and the Atrax are 3 genera restricted to Australia. The Atrax robustus is implicated in most human fatalities due to ...Missing: placement | Show results with:placement
[33]
Funnel-web spider bite - WikEM
May 29, 2022 · 90% of bites will not involve significant envenomation. · Local Symptoms: Intense pain, wheal with erythema at injection site, localized sweating ...
[34]
Funnel-Web Spider • LITFL • Toxinology Library
Nov 3, 2020 · Funnel-web spider bite: a systematic review of recorded clinical cases. Medical Journal of Australia 2005; 182:407-411; Isbister GK, Sibbritt ...
[35]
Funnel-web spider bite: a systematic review of recorded clinical cases
Apr 18, 2005 · Time to onset of symptoms was known for 42 cases of severe envenoming and ranged from 8 to 175 minutes (median, 28 min; IQR, 15–45 min). Two ...
[36]
Spider facts - The Australian Museum
There have been only 13 deaths recorded from male Sydney Funnel-webs, but up to 30-40 people are bitten by funnel-web spiders each year. Mouse spiders may have ...On This Page · Are Huntsman Spiders... · Spider Biology Facts
[37]
Guideline 9.4.2 - First Aid Management of Spider Bite
Symptoms and signs of funnel Web spider bite may include: pain at the bite ... Antivenom is available for treatment of funnel-web spider envenomation ...
[38]
Pressure Immobilisation - NSW Poisons Information Centre
How to apply a pressure-immobilisation bandage · Call 000 · Keep the person who has been bitten as still as possible. · Apply a firm bandage over the bitten area ( ...
[39]
Spider bites - treatment, symptoms and first aid - Healthdirect
Putting on a pressure immobilisation bandage. Only use an immobilisation bandage for funnel web or mouse spider bites. Using an elasticated roller bandage is ...
[40]
[PDF] FUNNEL WEB SPIDER ANTIVENOM Powder for injection 1 NAME ...
Aug 20, 2019 · FUNNEL WEB SPIDER ANTIVENOM is prepared from the plasma of rabbits immunised with the venom of the male Sydney funnel web spider (Atrax robustus) ...
[41]
Funnel Web Spider Antivenom - NPS MedicineWise
Funnel Web Spider Antivenom is a spider antivenom and is an injection designed to help neutralise the effect of the poison (venom) of the funnel web spider.<|control11|><|separator|>
[42]
[PDF] Snake and Spider Bites Clinical Management - NSW Health
Jun 21, 2024 · They vary from no evidence or minimal signs of bite marks to obvious bite marks, local pain, swelling, or bruising.Missing: statistics | Show results with:statistics
[43]
Behaviour of the Sydney funnel-web spider Atrax robustus over ...
This is the first study to assess changes in behavioural traits of A. robustus over different contexts and time. We found that adult female spiders made more ...
[44]
A venomous Australian spider turns out to be 3 species, not 1
Jan 17, 2025 · The Southern Sydney funnel-web (Atrax montanus) occurs mostly south and west of Sydney, with some overlap in its distribution with A. robustus.Missing: urban suburbs<|separator|>
[45]
'Learn how to safely catch funnel-webs': Sydneysiders tasked with ...
Nov 14, 2024 · Baby spiders collected from egg sacs via Australian Reptile Park's yearly callout are vital to creating lifesaving antivenom.
[46]
Characterisation of the effects of robustoxin, the lethal neurotoxin ...
The main action of robustoxin was a concentration-dependent slowing or removal of TTX-S sodium current inactivation. This steady-state current was maintained ...
[47]
Selective alteration of sodium channel gating by Australian funnel ...
The actions of potent mammalian neurotoxins isolated from the venom of two Australian funnel-web spiders were investigated using both electrophysiological ...
[48]
Research: Spider venom may offer stroke therapy - EMS1
Oct 24, 2017 · The venom of one of the world's deadliest spiders, the Australian funnel-web, may be used to treat nervous-system disorders including pain, epilepsy and stroke.
[49]
Record-breaking Sydney funnel-web spider dubbed 'Hemsworth' to ...
Jan 7, 2025 · The Australian Reptile Park relies on spider donations to create life-saving anti-venom from its male funnel-webs, which are milked for venom ...
[50]
Funnel-Web Egg Sac Season Has Arrived! - Australian Reptile Park
Aug 22, 2025 · Four funnel-web egg sacs laid at the Reptile Park, each holding 150 spiderlings that will help support Australia's venom program.
[51]
Quotes - Crocodile Dundee (1986) - IMDb
"Crocodile" Dundee: I don't mean to put down your black widow spider, but the funnelweb spider can kill a man in eight seconds, just by lookin' at him. Helpful• ...
[52]
Why don't we cuddle funnel-webs? - The Conversation
Mar 5, 2012 · When first describing Atrax robustus in 1877, British arachnologist Octavius Pickard Cambridge referred to this “primitive” spider's “large, ...<|separator|>