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webs and egg sacs
Trichonephila edulis (JS)
female: 23 mm|
male: 6 mm
In a large yellow web strung between dead tree branches or onto electricity poles; the males tend to occupy the edge of the female's web
Not aggressive (the spider normally runs to the top of the web when alarmed) and not considered very toxic
but potentially able to cause necrotising arachnidism, though this almost never occurs
In early 2020 the correct generic name for this spider and the family it belongs to are uncertain. In 2017 Dimitrov et al (Cladistics 33(3) 221-250)
moved back to the Araneidae all of the species that had previously been placed in a new family, the Nephilidae, and continued to use Nephila as the generic name for the common Australian golden orb weavers.
Then in 2019 Kintner et al (Systematic Biology 68(4) 557-572) resurrected the Family Nephilidae and changed to Trichonephila the generic name of some of the species that had
long been known as Nephila species. This seems to have confused the compilers of the World Spider Catalog because in February 2020 the WSC uses the names Trichonephila edulis and
Trichonephila plumipes but has left them in the Family Araneidae.
The species shown above exhibits striking sexual dimorphism, the small male often waiting on the periphery of the web. An important characteristic of the female is the present of black brushes along the legs.
The web is remarkably strong and has a characteristic yellow colour as does the fluffy egg sac which tends to be left in the tree the spider was using for support. Nephila/Trichonephila webs normally contain a string of debris masses which are the remains of insects the spider has eaten. The tendency to produce such a string is rare among orb weaver species so this is a useful identification feature.
In many parts of south-east Queensland this species is present in very large numbers, especially throughout the warmer months of the year. It is common for a single dead tree to have as many as 30 individual golden orb-weaver webs attached to it.
Known Range: This species is very common over all parts of Australia and Tasmania, even in relatively arid inland areas.
Spider(s) with a very similar appearance: Trichonephila plumipes and Nephila pilipes
Email Ron Atkinson for more information.
Last updated 2 January 2022.