Goblin Spiders are very similar to the Six-eyed Ground Spiders (Orsolobidae) and some Australian genera were initially placed in the oonopids until the family Orsolobidae was established. Differences between both families are subtle and include a peculiar, raised morphology of a tarsal chemosensory organ in orsolobids.
Araneae (Spiders)
Spiders are one of the largest orders of the class Arachnida, which also includes the scorpions (Scorpiones), pseudo- or bookscorpions (pseudoscorpiones), havestmen (Opiliones), a variety of orders of mites and ticks (Acari).
Spiders can be recognised by a body consisting of two major parts, the cephalothorax (or prosoma) and the abdomen (or opisthosoma). They are the only group of animals with spinnerets at the back of their abdomen and in which males use modified, secondary organs, the pedipalps, to transfer sperm to the female. The morphology of the male pedipalps and the female copulatory organ, the epigyne, are crucial for identification, specifically at the species level.
There are approximately 4,000 species of spiders described from Australia, but this represents probably only about 25% of the total fauna. Framenau (2023) provides a checklist of all described species of Australia (download at the bottom of this page).
Raven and Beard (2022) provide an interactive key to the subfamilies of spiders in Australia.
Publications
Framenau VW (2023): Checklist of Australian Spiders. Version 1.51 (18 November 2023). Harry Butler Institute, 105 pp.,
Raven RJ, Beard JJ (2022): Key to the spiders subfamilies of Australia. Department of Climate Change, Energy, the Environment and Water & Australian Biological Resources Study, WEB