Invertebrate Sydney Funnel Web Spider (Atrax robustus).

Steve

Mors Kochanski
Joined
Jun 11, 2011
Messages
389
Reaction score
22
Atrax robustus (Sydney Funnel Web Spider).

Common Name: Sydney Funnel Web Spider

Warning Dangerous and life threatening - Funnel-web spider venom is highly toxic and all species should be considered potentially dangerous.

Other names: Funnel Web Spider

Order: Atrax

Family: Hexathelidae

Subfamily: Atracinae

Genus: Hexathelinae

Species: Atrax robustus

Distribution: Distribution is primarily South of the Hunter River to the Illawarra region, and west to the Blue Mountains in New South Wales.

Habitat: They are mostly terrestrial spiders, favouring habitat with moist sand and clays. They typically build silk-lined tubular burrow retreats with collapsed "tunnels" or open "funnel" entrances from which irregular trip lines radiate out over the ground. In some exceptions, which lack trip lines but may have trapdoors, the silk entrance tube may be split into two openings, in a Y or T form. The burrow may be in the hollow of a tree trunk or limb, many metres above ground level.
Funnel-web spiders live in burrows in sheltered positions in the ground, or in stumps, tree trunks or ferns above the ground. Their burrows are lined with a sock of opaque white silk and several strong strands of silk radiating from the entrance.

Field Notes: Funnel-webs are large black spiders with a shiny head/thorax. The body may range from 1.5 cm up to more than 5 cm long depending on the species.
Female funnel-web spiders are stockier than males, with shorter legs and a bigger abdomen, which may be brown or bluish. The eyes are small and closely grouped, the fang bases extend horizontally from the front of the head and the long fangs lie parallel underneath (do not check this on a live spider!).






Image Source: http://www.spiderzrule.com/spider3.htm
http://www.abcpestcontrolsydney.com.au/images/sydneyfunnelwebspider1.jpg

Reference: http://www.csiro.au/resources/Funnelweb-Spider-Facts.html

http://en.wikipedia.org/wiki/Atrax_robustus
 
Last edited:
Top