The Find-a-Spider Guide

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Water spider

Fact Box
Species:
Megadolomedes australianus (QM)
(Note that some older books may refer to this spider as Dolomedes)
Family:
Pisauridae
Body length:
female: at least 25 mm
male: at least 20 mm
Habitat:
This spider is most often seen on the surface of still-water ponds. It can run on water surfaces and lay eggs in underwater retreats involving large air bubbles. It may also be found above the water surface in an irregular web in green vegetation
Toxicity:
May cause mild illness in humans
Megadolomedes australianus
Click to enlarge
Adult female
Click to enlarge
Another female
Click to enlarge
Another female

Spider(s) with a very similar appearance: The water spider Dolomedes instabilis and wolf spiders such as Lycosa godeffroyi, although it is noteworthy that water spiders lack the pair of large eyes that characterise lycosids.


Email Ron Atkinson for more information.    Last updated 9 February 2011.