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Author: Tracey Hawthorne
These natural history guides have been developed in the hope that young people and anyone with a budding interest in natural history will take up the challenge to learn the secrets of southern Africas fascinating fauna and flora.
These little guides are an invaluable resource for the beginner, providing information at a glance through superb photographs, maps and easy-to-read text.
• handy pocket size
Long-legged Sac Spider
Afrikaans name: Langbeensakspinnekop
Average size: Length: 10-16 mm
Identification: ‘Black-faced’ appearance
Characteristic: Long legs. Short, stout, black chelicerae
Where found: Built-up areas and forests; bark, stones, bushes, low vegetation, flowers, leaves, leaf litter and rotting logs.
Often found in citrus trees, strawberries and cotton; also in houses, where spins retreat sac in fabric folds.
Habits: Free-running. Agile, aggressive hunter, leaping on prey
Notes: It is these spiders that are responsible for most cytotoxic bites in southern Africa, as they crawl over sleeping humans
Bite: is not initially painful
Venom: Cytotoxic, causing inflammation and ulceration, fever and headache; wounds slow to heal, sometimes leading to secondary infections
Reproduction: Egg sac similar to retreat, but smaller and denser
Other genera: Griswoldia, Para- postenus, Phanotea, Syrisca
Similar species: Some Sac Spiders (family Clubionidae) have maroonish chelicerae and shorter first pair of legs; Mouse Spider (family Gnaphosidae).
Spiders and scorpions