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• Redback_spider abstract "The redback spider (Latrodectus hasseltii) is a species of venomous spider indigenous to Australia. It is a member of the cosmopolitan genus Latrodectus, the widow spiders. The adult female is easily recognised by her spherical black body with a prominent red stripe on the upper side of her abdomen and an hourglass-shaped red/orange streak on the underside. Females have a body length of about 10 millimetres (0.4 in), while the male is much smaller, being only 3–4 mm (0.12–0.16 in) long.Mainly nocturnal, the female redback lives in an untidy web in a warm sheltered location, commonly near or inside human residences. It preys on insects, spiders and small vertebrates that become ensnared in its web. It kills its prey by injecting a complex venom through its two fangs when it bites, before wrapping them in silk and sucking out the liquefied insides. Male spiders and spiderlings often live on the periphery of the female spiders' web and steal leftovers. Other species of spider and parasitoid wasps prey on this species. The redback is one of few arachnids which usually displays sexual cannibalism while mating. The sperm is then stored in the spermathecae, organs of the female reproductive tract, and can be used up to two years later to fertilise several clutches of eggs. Each clutch averages 250 eggs and is housed in a round white silken egg sac. The redback spider has a widespread distribution in Australia, and inadvertent introductions have led to established colonies in New Zealand, Japan, and in greenhouses in Belgium.The redback is one of the few spider species that can be seriously harmful to humans, and its preferred habitat has led it to being responsible for the large majority of serious spider bites in Australia. Predominantly neurotoxic to vertebrates, the venom gives rise to the syndrome of latrodectism in humans; this starts with pain around the bite site, which typically becomes severe and progresses up the bitten limb and persists for over 24 hours. Sweating in localised patches of skin occasionally occurs and is highly indicative of latrodectism. Generalised symptoms of nausea, vomiting, headache, and agitation may also occur and indicate severe poisoning. An antivenom has been available since 1956, and there have been no deaths directly due to redback bites since its introduction.".
• Redback_spider binomialAuthority Tamerlan_Thorell.
• Redback_spider class Arachnid.
• Redback_spider family Theridiidae.
• Redback_spider genus Latrodectus.
• Redback_spider kingdom Animal.
• Redback_spider order Spider.
• Redback_spider phylum Arthropod.
• Redback_spider synonym "*Latrodectus ancorifer".
• Redback_spider synonym "*Latrodectus cinctus".
• Redback_spider synonym "*Latrodectus hasselti ancorifer".
• Redback_spider synonym "*Latrodectus hasselti aruensis".
• Redback_spider synonym "*Latrodectus hasselti indicus".
• Redback_spider synonym "*Latrodectus indicus".
• Redback_spider synonym "*Latrodectus mactans hasselti".
• Redback_spider synonym "*Latrodectus scelio indicus".
• Redback_spider synonym "*Latrodectus scelio".
• Redback_spider thumbnail Latrodectus_hasseltii_close.jpg?width=300.
• Redback_spider wikiPageExternalLink Latrodectus+hasseltii.
• Redback_spider wikiPageID "723992".
• Redback_spider wikiPageRevisionID "602478490".
• Redback_spider binomial "Latrodectus hasseltii".
• Redback_spider binomialAuthority "Thorell, 1870".
• Redback_spider classis Arachnid.
• Redback_spider familia Theridiidae.
• Redback_spider genus "Latrodectus".
• Redback_spider hasPhotoCollection Redback_spider.
• Redback_spider image "Latrodectus hasselti male.png".
• Redback_spider image2Caption "Adult male".
• Redback_spider image2Width "270".
• Redback_spider imageCaption "Adult female".
• Redback_spider imageWidth "270".
• Redback_spider name "Redback spider".
• Redback_spider ordo Spider.
• Redback_spider phylum Arthropod.
• Redback_spider regnum "Animalia".
• Redback_spider species "L. hasseltii".
• Redback_spider synonyms "*Latrodectus scelio *Latrodectus scelio indicus *Latrodectus indicus *Latrodectus hasselti indicus *Latrodectus ancorifer *Latrodectus hasselti aruensis *Latrodectus hasselti ancorifer *Latrodectus cinctus *Latrodectus mactans hasselti".
• Redback_spider subject Category:Animals_described_in_1870.
• Redback_spider subject Category:Endemic_fauna_of_Australia.
• Redback_spider subject Category:Latrodectus.
• Redback_spider subject Category:Spiders_of_Australia.
• Redback_spider subject Category:Venomous_spiders.
• Redback_spider type Animal100015388.
• Redback_spider type Arachnid101769347.
• Redback_spider type Arthropod101767661.
• Redback_spider type Invertebrate101905661.
• Redback_spider type LivingThing100004258.
• Redback_spider type Object100002684.
• Redback_spider type Organism100004475.
• Redback_spider type PhysicalEntity100001930.
• Redback_spider type Spider101772222.
• Redback_spider type SpidersOfAustralia.
• Redback_spider type VenomousSpiders.
• Redback_spider type Whole100003553.
• Redback_spider type Animal.
• Redback_spider type Arachnid.
• Redback_spider type Eukaryote.
• Redback_spider type Species.
• Redback_spider type Animal.
• Redback_spider type Arachnid.
• Redback_spider type BiologicalLivingObject.
• Redback_spider type EukaryoticCell.
• Redback_spider type Organism.
• Redback_spider comment "The redback spider (Latrodectus hasseltii) is a species of venomous spider indigenous to Australia. It is a member of the cosmopolitan genus Latrodectus, the widow spiders. The adult female is easily recognised by her spherical black body with a prominent red stripe on the upper side of her abdomen and an hourglass-shaped red/orange streak on the underside.".
• Redback_spider label "Latrodectus hasselti".
• Redback_spider label "Latrodectus hasselti".
• Redback_spider label "Latrodectus hasselti".
• Redback_spider label "Latrodectus hasselti".
• Redback_spider label "Latrodectus hasseltii".
• Redback_spider label "Redback spider".
• Redback_spider label "Roodrugspin".
• Redback_spider label "Rotrückenspinne".
• Redback_spider label "ريدباك (عنكبوت)".
• Redback_spider label "セアカゴケグモ".
• Redback_spider label "紅背蜘蛛".
• Redback_spider sameAs Rotrückenspinne.
• Redback_spider sameAs Latrodectus_hasselti.
• Redback_spider sameAs Latrodectus_hasselti.
• Redback_spider sameAs セアカゴケグモ.
• Redback_spider sameAs Roodrugspin.
• Redback_spider sameAs Latrodectus_hasselti.
• Redback_spider sameAs Latrodectus_hasseltii.
• Redback_spider sameAs m.035vf5.
• Redback_spider sameAs Q82544.
• Redback_spider sameAs Q82544.
• Redback_spider sameAs Redback_spider.
• Redback_spider wasDerivedFrom Redback_spider?oldid=602478490.
• Redback_spider depiction Latrodectus_hasseltii_close.jpg.
• Redback_spider isPrimaryTopicOf Redback_spider.
• Redback_spider name "Redback spider".