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Cyrtophora hirta

Fact Box
Species:
Cyrtophora hirta (RM)
( Note: Cyrtophora parnasia has a very similar appearance)
Family:
Araneidae
formerly Argiopidae
Body length:
female: 10 mm
male: 5 mm
Habitat:
On a web with a central retreat shaped like an inverted cone with a lacy lower edge and suspended by a less uniform, tangled web
Toxicity:
Unknown; may cause mild illness but this species is not normally aggressive towards humans
Cyrtophora hirta
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Female and cone retreat
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The male
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Female from above
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In its retreat
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Its web and egg sac
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Female from front
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Underside of female

The cone-shaped tent which this spider uses as a retreat, a nursery, and a garbage dump, is distinctive. This species is most common in eucalypt forests and if present at all is likely to be found as large numbers of individual webs quite close to each other. A curious characteristic of this species appears to be that in spring and early summer large numbers of small webs can be found but most of these are soon empty, presumably because the spiders fail to grow to adulthood.

The male is quite unlike the female in appearance. Also noteworthy is the fact that adult webs usually have several small theridiid spiders (not necessarily all of the same species) scavenging around their edges.

Spider(s) with a very similar appearance: Some Araneus and Eriophora species, as well as Acroaspis species.



Email
Ron Atkinson for more information.    Last updated 15 January 2008.